Configuration overview

The 16-port T1/E1 ASAP Adapter card, 32-port T1/E1 ASAP Adapter card, and the T1/E1 ports on the 4-port T1/E1 and RS-232 Combination module each support fractional T1/E1 on a PPP channel group in network mode. Fractional T1/E1 allows one or more DS0 channels to be bundled together (up to the maximum bandwidth of the network link), allowing the customer to use only that portion of the link that is needed. This means that the PPP service can use a selected number of timeslots (octets) in the network T1 or E1 link, therefore reducing the amount of T1 or E1 bandwidth that must be leased or purchased from the attached carrier. This leads to multiplexing efficiencies in the transport network.

Only one channel group can be configured per port. When the channel group is configured for ppp-auto encapsulation and network mode, all timeslots (channels) are automatically allocated to the channel group. The user can then configure the number of timeslots needed. Timeslots not selected cannot be used.

The 6-port Ethernet 10Gbps Adapter card has four SFP ports for 1-Gb/s fiber or copper SFP transceivers and two SFP+ ports for 10-Gb/s fiber or copper SFP+ transceivers. The card also supports synchronous Ethernet timing. The 6-port Ethernet 10Gbps Adapter card is designed to complement or replace the 8-port Gigabit Ethernet Adapter card in situations where greater processing power and higher throughput capacity are required.

There are three versions of this card: 6-port Ethernet 10Gbps Adapter card version 1, 6-port Ethernet 10Gbps Adapter card version 2, and 6-port Ethernet 10Gbps Adapter card-E. All versions provide the same features as the 8-port Gigabit Ethernet Adapter card except that the 6-port Ethernet 10Gbps Adapter card-E does not have encryption functionality and the 6-port Ethernet 10Gbps Adapter card, version 2, also supports MACsec.

The 8-port Gigabit Ethernet Adapter card has eight SFP ports for fiber or copper SFPs. The card supports dual rate (100 Mb/s and 1000 Mb/s) and Gigabit (1000 Mb/s) fiber connections and 10/100/1000Base-T copper connections. The card also supports synchronous Ethernet timing.

There are three versions of the 8-port Gigabit Ethernet Adapter card. Version 1 and version 2 are identical except that version 2 provides larger table space for FIBs, ACLs, and so on. Version 2 also supports the full IPv6 subnet range for IPv6 static routes and interface IP addresses. The static route range is from /1 to /128, and the default route is ::/0. Supported interface IP address prefixes are from /4 to /127, and /128 on system or loopback interfaces. Version 3 is identical to version 2 except that it is equipped with a hardware-based encryption engine to support features such as IPSec.

Higher limits and full subnet ranges are supported only when all the adapter cards in a particular node are equipped with hardware for larger table support.

Gigabit Ethernet optical ports offer significant advantages over fast Ethernet ports, even where lower-speed services are currently offered. With Gigabit Ethernet, service providers have the opportunity to standardize access infrastructure, ensure that capacity is available to accommodate growing bandwidth requirements, and minimize the operational costs associated with future service upgrades to hardware and software.

There are two versions of the 10-port 1GigE/1-port 10GigE X-Adapter card. Both versions are identical except that version 2 is equipped with a hardware-based encryption engine to support features such as IPSec. The card is supported only on the 7705 SAR-18.

The 10-port 1GigE/1-port 10GigE X-Adapter card has 10 small form-factor pluggable (SFP) ports on its faceplate.

When the 10-port 1GigE/1-port 10GigE X-Adapter card is configured in 10-port GigE mode, the 10 SFP ports are available for fiber SFP transceivers. In this mode, the card supports dual-rate (100 Mb/s and 1000 Mb/s) and Gigabit (1000 Mb/s) fiber connections. The card also supports synchronous Ethernet timing.

When the 10-port 1GigE/1-port 10GigE X-Adapter card is configured in 1-port GigE mode, only one SFP+ (port 1) of the 10 ports is active and available for use with fiber SFP+ transceivers. The card supports 10-Gb/s fiber connections. The card also supports synchronous Ethernet timing. The 1-port GigE mode is designed for use in situations where greater processing power and higher throughput capacity are required.

The 10-port 1GigE/1-port 10GigE X-Adapter card provides larger table space for FIBs, ACLs, and so on. The card also supports the full IPv6 subnet range for IPv6 static routes and interface IP addresses. The static route range is from /1 to /128, and the default route is ::/0. Supported interface IP address prefixes are from /4 to /127, and /128 on system or loopback interfaces.

Higher limits and full subnet ranges are supported only when all the adapter cards in a particular node are equipped with hardware for larger table support.

The 2-port 10GigE (Ethernet) Adapter card/module is used to connect to and from access rings carrying a high concentration of traffic. The following table lists the maximum number of cards or modules that are supported on each platform. A single card can be installed in the 7705 SAR-8 Shelf V2 or the 7705 SAR-18; however, it is strongly recommended that a minimum of two cards be installed for redundancy.

The 2-port 10GigE (Ethernet) Adapter card/module has two small form-factor pluggable (XFP) ports on its faceplate. The two XFP ports are for 10-Gigabit Ethernet XFPs. The card provides high processing power and throughput capacity and operates at 10 Gb/s for Ethernet ports and 2.5 Gb/s for the virtual port (v-port).

The 2-port 10GigE (Ethernet) Adapter card provides larger table space for FIBs, ACLs, and so on. The card also supports the full IPv6 subnet range for IPv6 static routes and interface IP addresses on the v-port. The supported range for statically provisioned or dynamically learned routes is from /1 to /128. Supported interface IP address prefixes are from /4 to /127, and /128 on system or loopback interfaces.

The 2-port 10GigE (Ethernet) module supports IPv6 on the v-port. The supported range for statically provisioned or dynamically learned routes is from /1 to /64 or is /128 (indicating a host route). Supported interface IP address prefixes are from /4 to /64, and /128 on system or loopback interfaces.

The 2-port 10GigE (Ethernet) Adapter card/module supports LLDP on the Ethernet ports but not on the v-port.

The Packet Microwave Adapter card has two RJ45 ports (ports 1 and 2) and six SFP ports (ports 3 through 8). All ports provide 10/100/1000 Mb/s connections (when connected to an MPR-e radio, they are always in Gigabit Ethernet (1-Gb/s) mode). Ports 1 through 4 support microwave awareness (MWA) and Ethernet/IP/MPLS networking; ports 5 through 8 support Ethernet/IP/MPLS networking only.

All Gigabit Ethernet ports provide the same networking feature capability as the 8-port Gigabit Ethernet Adapter card. For frequency synchronization, synchronous Ethernet and SSM are the mechanisms that are applied when using optical 1000Base-SX to connect to an MPR-e radio. When using electrical 1000Base-T to connect the Packet Microwave Adapter card and an MPR-e radio, proprietary clock recovery (PCR) is used (a copper SFP is mandatory on ports 3 and 4).

The 4-port SAR-H Fast Ethernet module has four RJ45 Fast Ethernet ports (10/100 Mb/s) on its faceplate. Any functionality supported on the 7705 SAR-H Ethernet ports is also supported on the 4-port SAR-H Fast Ethernet module, with the exception of hierarchical QoS (H-QoS) functionality and hybrid mode.

The 6-port SAR-M Ethernet module has six Ethernet ports:

• two SFP Fast Ethernet ports (10/100 Mb/s) (ports 1 and 2)

• two XOR (combination) SFP/RJ point five Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 3a/3b and 4a/4b)

• two PoE-capable RJ point five copper Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 5 and 6)

Ports 5 and 6 can each support Power over Ethernet (PoE). Port 5 can also support PoE+, but if it is configured for PoE+, then port 6 cannot support PoE power.

Any functionality supported on the 7705 SAR-M Ethernet ports is also supported on the 6-port SAR-M Ethernet module, with the exception of half-duplex mode (all ports) and hybrid mode (Fast Ethernet ports only).

The 7705 SAR-A has two variants with fixed physical configurations. Both variants have 12 Ethernet ports:

• four XOR (combination) Gigabit Ethernet ports, either 10/100/1000Base-T RJ45 (ports 1A to 4A) or 100/1000 Mb/s SFP (ports 1B to 4B)

• four SFP Gigabit Ethernet ports (100/1000 Mb/s) (ports 5 to 8)

• four RJ45 Fast Ethernet ports (10/100 Mb/s) (ports 9 to 12)

The 7705 SAR-Ax has a fixed physical configuration that has 12 Ethernet ports:

• four XOR (combination) Gigabit Ethernet ports, either 10/100/1000Base-T RJ45 (ports 1A to 4A) or 100/1000 Mb/s SFP (ports 1B to 4B)

• eight SFP Gigabit Ethernet ports (100/1000 Mb/s) (ports 5 to 12)

The 7705 SAR-H has a fixed physical configuration that has eight Ethernet ports:

• two SFP Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 1 and 2)

• two XOR (combination) RJ45/SFP Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 3 and 4)

• four PoE-capable RJ45 Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 5 to 8)

The 7705 SAR-H also has two module slots.

If a PoE Power Supply is connected, it increases the number of Ethernet ports that can supply PoE to a connected device.

The 7705 SAR-Hc has a fixed physical configuration that has six Ethernet ports:

• two SFP Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 1 and 2)

• two Gigabit Ethernet RJ45 ports (10/100/1000 Mb/s) (ports 3 and 4)

• two PoE-capable RJ45 Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 5 and 6)

The 7705 SAR-M has four variants with fixed physical configurations. All variants have seven Ethernet ports:

• four SFP Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 1 to 4)

• three Gigabit Ethernet RJ45 ports (10/100/1000 Mb/s) (ports 5 to 7)

Two variants of the 7705 SAR-M also have a module slot.

The 7705 SAR-Wx has four variants with fixed physical configurations that provide the following Ethernet interfaces.

Two variants have the following five Gigabit Ethernet ports:

• three SFP Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 1 to 3)

• two Gigabit Ethernet RJ45 ports (10/100/1000 Mb/s) (ports 4 and 5)

Two variants have the following five Gigabit Ethernet ports:

• three SFP Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 1 to 3)

• one Gigabit Ethernet RJ45 port (10/100/1000 Mb/s) (port 4)

• one PoE+ Gigabit Ethernet RJ45 port (10/100/1000 Mb/s) (port 5)

The 7705 SAR-X has a fixed physical configuration that has 14 Ethernet ports:

• four XOR (combination) RJ45/SFP Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 2/1A, 2/2A, 3/1A, 3/2A for RJ45 and 2/1B, 2/2B, 3/1B, 3/2B for SFP)

• eight SFP Gigabit Ethernet ports (10/100/1000 Mb/s) (ports 2/3 to 2/6 and 3/3 to 3/6)

• two SFP+ 10-Gigabit Ethernet ports (ports 2/7 and 3/7)

On the16-port T1/E1 ASAP Adapter card, channelization is supported down to the DS0 level. To change port types, all ports must first be shut down. The ports can be configured for DS1 (T1) or E1 operation. All ports on the card must be either T1 or E1; there cannot be a mix of the two types. When the first port is configured on a card, all other ports on the card must be set to the same type.

The 16-port T1/E1 ASAP Adapter card supports fractional T1/E1 on network ports configured for PPP. Fractional T1/E1 allows a portion of the link to be used for traffic (up to the full link bandwidth).

DS1 ports on the adapter card can be configured for either bipolar with eight-zero substitution (B8ZS) zero code suppression or alternate mark inversion (AMI). B8ZS and AMI are line coding techniques.

On the 32-port T1/E1 ASAP Adapter card, channelization is supported down to the DS0 level. To change port types, all ports must first be shut down. The ports can be configured for DS1 (T1) or E1 operation. All ports on the card must be either T1 or E1; there cannot be a mix of the two types. When the first port is configured on a card, all other ports on the card must be set to the same type.

The 32-port T1/E1 ASAP Adapter card supports fractional T1/E1 on network ports configured for PPP. Fractional T1/E1 allows a portion of the link to be used for traffic (up to the full link bandwidth).

DS1 ports on the card can be configured for either bipolar with eight-zero substitution (B8ZS) zero code suppression or alternate mark inversion (AMI). B8ZS and AMI are line coding techniques.

On the 2-port OC3/STM1 Channelized Adapter card, channelization is supported down to the DS0 level. To change port types, all ports must first be shut down. The ports can be configured for DS1 (T1) or E1 channelization. All ports on the card must be either SONET or SDH; there cannot be a mix of the two types. When the first port is configured on a card, all other ports on the card must be set to the same type.

The 2-port OC3/STM1 Channelized Adapter card also supports DS3 channelization on access for TDM services as well as network mode with PPP.

The 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card can be configured to be in 4-port OC3/STM1 mode or 1-port OC12/STM4 mode (using the mda-mode command).

When the 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card is configured in 4-port OC3/STM1 mode, four SFP ports are available for optical and electrical SFP transceivers. In this mode, the card supports OC3 SONET or STM1 SDH transmission.

When the 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card is configured in 4-port OC3/STM1 mode, channelization is supported down to the DS1 level. To change port types, all ports must first be shut down. The ports can be configured for DS1 (T1) or E1 channelization in access mode, or PPP/MLPPP or POS in network mode. All ports on the card must be either SONET or SDH; there cannot be a mix of the two types. When the first port is configured on a card, all other ports on the card must be set to the same type. Switching between port types causes the adapter card to reset.

When the 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card is configured in 1-port OC12/STM4 mode, SFP port 1 is available for optical SFP transceivers. Ports 2 through 4 are not available. In this mode, the card supports OC12 SONET and STM4 SDH transmission. The 1-port OC12/STM4 mode is designed for use in situations where greater bandwidth is required on a single port.

The 4-port DS3/E3 Adapter card has two versions. Both versions have the same functionality; version 2 of the adapter card is a replacement for version 1.

The 4-port DS3/E3 Adapter card has four TDM DS3/E3 ports. The port type must be configured to be either DS3 or E3. Each DS3 port can be clear channel or channelized down to DS0 (64 kb/s). E3 ports can be clear channel only. Once the first port type has been configured, all other ports on the same 4-port DS3/E3 Adapter card must be set to the same type.

To change between types, the ports must first be deleted. DS3 ports provide bipolar with three-zero substitution (B3ZS) zero code suppression and E3 ports provide high density bipolar of order 3 (HDB3) zero code suppression. B3ZS and HDB3 zero code suppression are line coding techniques.

Channelization is supported down to the DS0 level (for DS3 ports only). To change port types, all ports must first be shut down. The ports can be configured for DS1 (T1) or E1 operation. All ports on the card must be either T1 or E1; there cannot be a mix of the two types. When the first port is configured on a card, all other ports on the card must be set to the same type.

On the 8-port Voice & Teleprotection card, channelization is supported down to the DS0 level. To change port types, all ports must first be shut down. The ports can be configured for DS1 (T1) or E1 operation. All ports on the card must be either T1 or E1; there cannot be a mix of the two types. When the first port is configured on a card, all other ports on the card must be set to the same type.

Channelization is supported on the two codirectional G.703 ports and two IEEE C37.94 teleprotection interface ports.

On the 8-port C37.94 Teleprotection card, channelization is supported down to the DS0 level on the eight IEEE C37.94 teleprotection interface (TPIF) ports.

There are two versions of the 12-port Serial Data Interface card.

Version 2 has four connectors that support three serial data ports each. Each port grouping can be configured for V.35, RS-232, or X.21 operation. When a port has been configured for a specific interface type, the other two ports in that same grouping must be configured for the same type. The card also supports an RS-530 interface with the use of an adapter cable that connects to a DB15 connector on the front of the X.21 distribution panel. There is no configuration specifically for the RS-530 interface; configuration is done in X.21 mode and applies to the RS-530 interface when it is physically enabled through hardware. All X.21 functionality is available on the RS-530 interface, except that only DCE operation is supported for RS-530. However, because X.21 does not support all the control leads available for RS-530, only a subset of the RS-530 control leads are supported.

The 12-port Serial Data Interface card, version 3, has six connectors that support two data ports each. Each port grouping can be configured for V.35, RS-232, X.21, or RS-530 operation. When a port has been configured for a specific interface type, the other port in the group must be configured for the same type.

Channelization on the 12-port Serial Data Interface card is supported down to the DS0 level.

T1/E1 ports on the 4-port T1/E1 and RS-232 Combination module (supported on the 7705 SAR-H) support channelization down to the DS0 level. To change port types, all ports must first be shut down. The ports can be configured for DS1 (T1) or E1 operation. All ports on the module must be either T1 or E1; there cannot be a mix of the two types. When the first port is configured on a module, all other ports on the card must be set to the same type.

The 7705 SAR-A has two variants with fixed physical configurations. One variant supports both Ethernet and T1/E1 ports. The variant that supports T1/E1 ports includes eight RJ45 T1/E1 ports. All ports must be configured as either T1 or E1 ports; a mix of T1 and E1 ports is not allowed.

DS1 (T1) ports on the chassis can be configured for either bipolar with eight-zero substitution (B8ZS) zero code suppression or alternate mark inversion (AMI). B8ZS and AMI are line coding techniques.

The 7705 SAR-Hc has a fixed physical configuration that includes two RS-232 RJ45 ports. The chassis also includes Gigabit Ethernet/Ethernet support via SFP and RJ45 ports.

The 7705 SAR-M has four variants with fixed physical configurations. Two variants support both Ethernet and T1/E1 ports. These variants include 16 RJ45 T1/E1 ports. All ports must be configured as either T1 or E1 ports; a mix of T1 and E1 ports is not allowed.

DS1 (T1) ports on the chassis can be configured for either bipolar with eight-zero substitution (B8ZS) zero code suppression or alternate mark inversion (AMI). B8ZS and AMI are line coding techniques.

The 7705 SAR-X has a fixed physical configuration that provides TDM pseudowire services via eight T1/E1 RJ45 ports.

The 6-port E&M Adapter card has six RJ45 ports that support the transport of an analog voiceband signal between two analog devices over a digital network. The analog signals are converted into a 64 kb/s digital pulse code modulation (PCM) format using either Mu-Law (North America) or A-Law (rest of world) companding. The type of companding is selectable on a per-card basis. Companding conversion (that is, Mu-Law to A-Law or vice versa) is not supported.

The signaling type is selectable on a per-card basis. When either A-Law or Mu-Law companding is configured, Type I, Type II, or Type V signaling can be selected. However, the only supported configurations are both ends of the connection operating in the same mode (for example, Type I to Type I) or one end operating in Type I mode and the other in Type V mode. The default signaling type for Mu-Law is Type I and the default signaling type for A-Law is Type V.

Each voice port can be configured to operate in either a two-wire or four-wire (default) mode. The ports (in groups of three: ports 1 to 3 and ports 4 to 6) can also be configured to operate in transmission-only mode, which provides a four-wire audio path with no signaling. A transmit and receive transmission level point (the analog-to-digital decibel level) can be configured for each port. The following table shows the signaling type, companding law, and audio wires configuration options on the 6-port E&M Adapter card.

The 8-port Voice & Teleprotection card supports the transport of an analog voiceband signal between two analog devices over a digital network.

The card has two FXS RJ45 ports and two FXO RJ45 ports that support analog voiceband signals. The analog signals are converted into a 64 kb/s digital pulse code modulation (PCM) format using either Mu-Law (North America) or A-Law (rest of world) companding. The type of companding is selectable on a per-card basis. Companding conversion (that is, Mu-Law to A-Law or vice versa) is not supported.

The signaling type is selectable at the port level on a per-port basis depending on companding type.

FXO supports:

• 1511profile1 (1511 loop start) – A-Law companding

• 3600ls (loop start) – Mu-Law companding

• 3600re (remote extension) – A-Law companding

• 1511sn137 (1511 profile 137) – A-Law companding

FXS supports:

• 3600plar (private line automatic ringdown) – A-Law and Mu-Law companding

• 1511plar – A-Law companding

• 1511profile1 (loop start) – A-Law companding

• 3600ls (loop start) – Mu-Law companding

• 3600re (remote extension) – A-Law companding

• 1511sn137 (1511 profile 137) – A-Law companding

The default signaling type for FXO and FXS is 3600ls for Mu-Law companding and 3600re for A-Law companding.

The 8-port FXO Adapter card supports the transport of an analog voiceband signal between two analog devices over a digital network.

The card supports analog voiceband signals through four RJ45 connectors that provide eight foreign exchange office (FXO) ports, with two ports supported per connector. The analog signals are converted into a 64 kb/s digital pulse code modulation (PCM) format using either Mu-Law (North America) or A-Law (rest of world) companding. The type of companding is selectable on a per-card basis. Companding conversion (that is, Mu-Law to A-Law or vice versa) is not supported.

The signaling type is selectable at the port level on a per-port basis depending on companding type.

FXO supports:

• 1511profile1 (1511 loop start) – A-Law companding

• 3600ls (loop start) – Mu-Law companding

• 3600re (remote extension) – A-Law companding

• 1511sn137 (1511 profile 137) – A-Law companding

The default signaling type is 3600ls for Mu-Law companding and 3600re for A-Law companding.

The 6-port FXS Adapter card provides the capability of transporting a large number of voice circuits from one 7705 SAR location and terminating them at another 7705 SAR location that is connected to a PBX.

The card can also be configured for a private line automatic ringdown (PLAR) application, which is typically used outside of a PBX network, in order to provide a site-to-site or remote site-to-control center hotline functionality.

The card has six foreign exchange subscriber (FXS) ports. Each port provides a short-reach, on-premises analog interface to an analog telephone set. After an incoming analog signal from a set is terminated on one of the FXS interfaces, it is converted into a digital 64 kb/s pulse code modulation (PCM) format using either Mu-Law companding (North America) or A-Law companding (rest of world).

The signal is then mapped into the E1 channel associated signaling (CAS) transport scheme for A-Law or the T1 robbed bit signaling (RBS) transport scheme for Mu-Law and transmitted using a Cpipe over any 7705 SAR network interface that supports the Cpipe service. For standard TDM, the network interface can be a T1/E1 or OC3/STM1 channelized interface. For MPLS, an Ethernet, T1/E1, OC3/STM1 channelized MLPPP, or OC3/STM1 clear channel interface can be used.

For a PBX application, the signal is terminated at the 7705 SAR hub location that is connected to a PBX by either an FXO interface or a T1/E1 interface (assuming the signaling formats are compatible). The FXO interface can be provided by either an 8-port FXO Adapter card or 8-port Voice & Teleprotection card that is installed in a 7705 SAR-8 Shelf V2 or 7705 SAR-18 chassis at the 7705 SAR hub location.

For a PLAR application, the signal is terminated on an FXS interface on either another 6-port FXS Adapter card or an 8-port Voice & Teleprotection card that is installed in a 7705 SAR-8 Shelf V2 or 7705 SAR-18 chassis that is located at a remote location or terminated on TDM-capable equipment such as a 3600 MainStreet or 1511 MAX. The connection is made over an E1 interface or a T1 interface. A hotline call can originate from the TDM-capable node and terminate on an FXS interface on a 6-port FXS Adapter card (or on an FXS interface on an 8-port Voice & Teleprotection card).

The following table shows the configuration options available on a 6-port FXS Adapter card. The companding law type is configured at the card level; the other options are configured at the voice port level.

The 7705 SAR supports egress rate limiting and ingress rate limiting on Ethernet ports.

The egress rate is set at the port level in the config>port>ethernet context.

Egress rate limiting sets a limit on the amount of traffic that can leave the port to control the total bandwidth on the interface. If the egress rate limit is reached, the port applies backpressure on the queues, which stops the flow of traffic until the queue buffers are emptied. This feature is useful in scenarios where there is a fixed amount of bandwidth; for example, a mobile operator who has leased a fixed amount of bandwidth from the service provider.

The ingress-rate command configures a policing action to rate-limit the ingress traffic. Ingress rate enforcement uses dedicated hardware for rate limiting; however, software configuration is required at the port level (ingress rate limiter) to ensure that the network processor or the adapter card or port never receives more traffic than they are optimized for.

The configured ingress rate ensures that the network processor does not receive traffic greater than this configured value on a per-port basis. When the ingress rate value is reached, all subsequent frames are dropped. The ingress rate limiter drops excess traffic without determining whether the traffic has a higher or lower priority.

Access ports on the following can be configured for PPP/MLPPP channel groups:

• 2-port OC3/STM1 Channelized Adapter card

• 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card

• 12-port Serial Data Interface card

• 16-port T1/E1 ASAP Adapter card

• 32-port T1/E1 ASAP Adapter card

• T1/E1 ports on the 4-port T1/E1 and RS-232 Combination module (on 7705 SAR-H)

• T1/E1 ports on the 7705 SAR-A

• T1/E1 ports on the 7705 SAR-M

• T1/E1 ports on the 7705 SAR-X

Customer IP traffic can be transported directly over PPP or MLPPP links. Access ports on the following can also be configured for TDM to transport 2G traffic from BTSs or ATM/IMA to transport 3G UMTS traffic from Node Bs:

• 2-port OC3/STM1 Channelized Adapter card

• 16-port T1/E1 ASAP Adapter card

• 32-port T1/E1 ASAP Adapter card

• T1/E1 ports on the 7705 SAR-M

In access mode, PPP channels can be associated with n ✕ DS0 channel groups. Although multiple PPP channel groups are supported per T1/E1 port, all the channel groups must be the same encapsulation type. For example, if one channel group on a given port is set for ipcp encapsulation, another channel group on the same port cannot be set to cem. If MLPPP channels are used, an MLPPP channel group fills up an entire DS1 or E1 link.

The 2-port OC3/STM1 Channelized Adapter card supports ipcp encapsulation of PPP/MLPPP packets for transport over an Ipipe.

The data ports on the 12-port Serial Data Interface card and the RS-232 ports on the 4-port T1/E1 and RS-232 Combination module provide transport between two data devices. Each data stream that is transported across the network can be mapped into a TDM pseudowire (Cpipe) for transport across an MPLS network. The other end can terminate either on another 7705 SAR or a multiplexer capable of terminating the pseudowire.

The 12-port Serial Data Interface card supports frame relay encapsulation of data on V.35 and X.21 channel groups for transport over a frame relay pseudowire (Fpipe) or IP interworking pseudowire (Ipipe). The 12-port Serial Data Interface card also supports ipcp and cisco-hdlc encapsulation of PPP and Cisco HDLC packets, respectively, for transport over an Ipipe.

The 12-port Serial Data Interface card and the 4-port T1/E1 and RS-232 Combination module can also be part of a system architecture where a circuit originates on an SDI port on the 7705 SAR, transits over an MPLS network, and terminates on a TDM-capable node (such as the 3600 MainStreet) connected to a 7705 SAR over a T1/E1 connection. In addition to the MPLS network functionality, the 12-port Serial Data Interface card and the 4-port T1/E1 and RS-232 Combination module can also operate in a TDM SAP-to-SAP mode where the other SAP can be another port on the 12-port Serial Data Interface card or on a T1/E1 ASAP card.

Access ports on the 8-port Gigabit Ethernet Adapter card, 6-port Ethernet 10Gbps Adapter card, 10-port 1GigE/1-port 10GigE X-Adapter card (10-port 1GigE mode only), and the Packet Microwave Adapter card can transport traffic from sources such as e911 locators, site surveillance equipment, VoIP phones, and video cameras. The Ethernet traffic is transported over the PSN using Ethernet VLLs.

A microwave link from a Packet Microwave Adapter card port in access mode can peer with user equipment such as a node B or MPR-e radio. The 7705 SAR-8 Shelf V2 or the 7705 SAR-18 treat the microwave access link as a normal SAP into a service such as Epipe, Ipipe, or VPLS/VPRN.

Voice ports on the 6-port E&M Adapter card, 8-port Voice & Teleprotection card, and 8-port FXO Adapter card provide voiceband transmission between two analog devices over a digital network. A 7705 SAR-8 Shelf V2 or 7705 SAR-18 terminates the voice circuit and then transmits the data over a TDM-based network interface (SAP-to-SAP) or an MPLS packet-based network interface (SAP-to-SDP). For standard TDM, a T1 or E1 interface is used to transmit the data across the network.

For MPLS, any network interface (that is, Ethernet, T1/E1 MLPPP, or OC3/STM1) can be used. The traffic originating from the 6-port E&M Adapter card, 8-port Voice & Teleprotection card, or 8-port FXO Adapter card can be mapped into a TDM pseudowire (Cpipe) for transport across the MPLS network. The 6-port E&M Adapter card, and 8-port FXO Adapter card support one TDM pseudowire per port.

The voice circuit can terminate on another 7705 SAR-8 Shelf V2 or 7705 SAR-18 over the MPLS or T1/E1 TDM connection, on other TDM-capable equipment (such as a 3600 MainStreet node) over a T1/E1 TDM connection, or on other MPLS-capable equipment over an MPLS pseudowire emulation (PWE) connection. A TDM-capable node (such as a 3600 MainStreet or 1511 MAX) can also connect to an FXO port on the 8-port Voice & Teleprotection card.

Voice ports on a 6-port FXS Adapter card can be configured for a PBX application or a PLAR (hotline) application. For a PBX application, the voice circuits are terminated on an FXO interface at a 7705 SAR hub location that is connected to a PBX. The FXO interface can be provided by either an 8-port FXO Adapter card or 8-port Voice & Teleprotection card that is installed in a 7705 SAR-8 Shelf V2 or 7705 SAR-18 chassis at the 7705 SAR hub location.

For a PLAR application, voice circuits are terminated on an FXS interface on either another 6-port FXS Adapter card or an 8-port Voice & Teleprotection card that is installed in a 7705 SAR-8 Shelf V2 or 7705 SAR-18 chassis located at a remote location or terminated on TDM-capable equipment such as a 3600 MainStreet or 1511 MAX. A hotline call can also originate from the TDM-capable node and terminate on an FXS interface on a 6-port FXS Adapter card (or on an FXS interface on an 8-port Voice & Teleprotection card.

On an 8-port C37.94 Teleprotection card, access traffic over the TPIF interfaces can be mapped into a TDM pseudowire (Cpipe) for transport across an MPLS network. The TPIF interfaces connect teleprotection relays used by utilities. They can also be used with a relay to connect to a TPIF interface on an 8-port Voice & Teleprotection card or to a TPIF interface on equipment such as a 1511 MAX.

SONET/SDH ports in access mode on a 4-port OC3/STM1 Clear Channel Adapter card can be configured for ATM (such as for 3G UMTS Node Bs).

The DS3/E3 clear channel access ports on the 4-port DS3/E3 Adapter card, can be configured for ATM PW services (categories CBR, VBR-rt, VBR-nrt, UBR, and UBR+MCR), for TDM PW services to transport 2G traffic from BTSs, and for frame relay PW service.

Access ports on the 2-port OC3/STM1 Channelized Adapter card can be configured for TDM to transport 2G traffic from BTSs or ATM/IMA to transport 3G UMTS traffic from Node Bs. Access ports on the 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card can only be configured for TDM.

All member links of the IMA group must reside on the same card. The 2G traffic is transported across the PSN encapsulated in a TDM VLL. The 3G traffic is transported using ATM VLLs.

For PPP/MLPPP channel groups, the encapsulation type must be ipcp. For Ethernet VLLs, the encapsulation type can be null, dot1q, or qinq. For TDM VLLs, the encapsulation type must be cem. For ATM VLLs, the encapsulation type must be atm.

Network uplinks can be configured as standalone PPP ports, or MLPPP can be configured on T1/E1 ports or channels. All member links of an MLPPP group must be of the same type (either E1 or Ds1).

The following cards, modules, and platforms support multilink bundles:

• T1/E1 ports on the 7705 SAR-A

• T1/E1 ports on the 7705 SAR-M

• T1/E1 ports on the 7705 SAR-X

  The following must have all member links of an MLPPP bundle configured on the same card or module:

  • 16-port T1/E1 ASAP Adapter card

  • 32-port T1/E1 ASAP Adapter card

  • T1/E1 ports on the 4-port T1/E1 and RS-232 Combination module (on 7705 SAR-H)

  The following must have all member links of an MLPPP bundle configured on the same card or module, and on the same port:

  • 2-port OC3/STM1 Channelized Adapter card

  • 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card

Ethernet ports on the 8-port Gigabit Ethernet Adapter card, 6-port Ethernet 10Gbps Adapter card, 10-port 1GigE/1-port 10GigE X-Adapter card, and Packet Microwave Adapter card can be configured for network mode. Ethernet uplinks can be used as a cost-effective alternative to T1/E1 links.

On the 2-port 10GigE (Ethernet) Adapter card and 2-port 10GigE (Ethernet) module, the Ethernet ports and the v-port can be configured for network mode only.

A microwave link from a Packet Microwave Adapter card port in network mode provides a network uplink to an MPR-e radio. The 7705 SAR-8 Shelf V2 or 7705 SAR-18 treats the microwave link as a Gigabit Ethernet network link with MPLS always running over it. All standard MPLS/IP functions available on a network port or SDP are also available on the microwave link.

For network uplinks on the 4-port OC3/STM1 Clear Channel Adapter card and 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card, a clear channel port can be configured for POS to connect to the packet network. PPP can be enabled on a port by setting the encapsulation type to ppp-auto.

On the 2-port OC3/STM1 Channelized Adapter card, DS3 clear channels within OC3 or STM1 can be configured for PPP as the network uplink. The encapsulation type must be set to ppp-auto.

On the 4-port DS3/E3 Adapter card, a DS3/E3 clear channel port can be configured for PPP as the network uplink. The encapsulation type must be set to ppp-auto.

The 7705 SAR supports both copper and fiber uplinks.

Hybrid ports are supported on Ethernet ports, where they provide the capabilities and features of access and network mode ports on a per-VLAN basis. The following services support hybrid port functionality: Epipe PW, Ipipe PW, IP-VPN, VPLS, and IES.

For ingress traffic, QoS and traffic management on a hybrid port functions in the same way for access and network port modes. See the 7705 SAR Quality of Service Guide, ‟QoS for hybrid ports on Gen-2 hardware” and ‟QoS for Gen-3 adapter cards and platforms” for details.

Network VLANs on a hybrid port provide OAM down MEP support, as well as port loopback support (in line mode with latched timers only).

The following hardware supports hybrid ports:

• 6-port SAR-M Ethernet module (except for the Fast Ethernet ports (ports 1 and 2))

• 6-port Ethernet 10Gbps Adapter card

• 8-port Gigabit Ethernet Adapter card

• 10-port 1GigE/1-port 10GigE X-Adapter card (only in 10-port 1GigE mode)

• Packet Microwave Adapter card (only in Ethernet port mode (not mw-link mode))

• 7705 SAR-A Ethernet ports (except for the Fast Ethernet ports (ports 9 to 12))

• 7705 SAR-Ax Ethernet ports

• 7705 SAR-M Ethernet ports

• 7705 SAR-H Ethernet ports

• 7705 SAR-Hc Ethernet ports

• 7705 SAR-Wx Ethernet ports

• 7705 SAR-X Ethernet ports

In some scenarios, combining the access and network capabilities under the same port is beneficial. A typical scenario is shown in the following figure, where a single port hosts both access-side services and a traffic management model together with network-side IP/MPLS routing and switching capabilities simultaneously.

In this scenario, a network interface is configured to ensure connectivity between the cell site 7705 SAR and the aggregation site 7705 SAR. The network interface is used for all IP/MPLS traffic and is bound to VLAN-1. Another VLAN (VLAN-2) is configured to bind the management traffic of a microwave radio (an MPR-e) to an access-side service such as an Ethernet PW or VPLS. For security reasons, many mobile operators prefer to transport management traffic of network elements under a service construct as opposed to basic GRT-based routing. To accommodate this preference, an access-side service and a network interface can be configured to coexist on the same port when the port is configured for hybrid mode.