This section briefly describes the major topologies supported for Alcatel-Lucent 1665 DMX.
Alcatel-Lucent 1665 DMX supports Unidirectional Path Switched Rings (UPSR) at the STS-n and VT1.5 level. When both Main slots are equipped with OC-192/48/12 VLF or large VT fabric circuit packs, an STS-1/VT1.5 switching fabric (STS-1, STS-3c, STS-12c, STS-48cSTS-48c, or STS-192c) supports the low-speed interfaces. OC-48/12 medium VT fabric cards, supporting STS-1, STS-3c, STS-12c, and STS-48c are also available. Each circuit pack establishes both an east-to-west and a west-to-east rotation on the ring. A UPSR ring provides a very valuable and reliable foundation for services protecting against fiber cuts and node failures.
Alcatel-Lucent 1665 DMX supports an OC-192/48 Bidirectional Line Switched Ring (BLSR). When both Main slots are equipped with OC-192/48 high-speed circuit packs, an STS-1 switch fabric supports the low-speed interfaces (STS-1, STS-3c, STS-12c, or STS-48c. When both Main slots are equipped with VLF packs, in addition to low-speed interfaces (STS-1, STS-3c, STS-12c, or STS-48c), STS-192c is also a supported rate.). A 2-fiber bidirectional line-switched ring (BLSR) is a self-healing ring configuration in which bidirectional traffic travels over the same set of nodes in each direction. Bidirectional switching makes use of redundant (protection) bandwidth on the bidirectional lines that interconnect the nodes in the ring to provide protection for traffic carried on the working bandwidth. Because the traffic is bidirectional, a single circuit does not necessarily consume bandwidth on every span in the ring. This leaves the spans between other nodes available for additional traffic. Therefore, with distributed switching patterns, a BLSR can carry more traffic than the same facilities could carry if configured for a unidirectional path-switched ring. In BLSR configurations, the VT switch fabric located in the MAIN packs is used only for Function Unit or Growth Slot hairpins.
Alcatel-Lucent 1665 DMX supports VT BLSRs on all high speed OC-192 interfaces and on high-speed OC-48 interfaces that have a 48 STS-1 VT fabric or VLF (LNW29, LNW27, LNW32, LNW56, LNW58, LNW59, LNW76, LNW82, LNW202, LNW502,LNW504).
Alcatel-Lucent 1665 DMX supports multiple BLSRs on the low-speed interfaces. Alcatel-Lucent 1665 DMX supports 15 simultaneous BLSR protection groups in a single shelf. The 15 protection groups can be provisioned on any available OC-48 and OC-192 port pairs within the high-speed and low-speed groups.
When equipped with VLF Main packs (LNW59/LNW82/LNW504), Alcatel-Lucent 1665 DMX allows true 0x1 unprotected circuit pack applications. That means that any slot can be equipped with any pack (some restrictions apply). For example, an LNW170 could be used to provide switched Ethernet services in slot D1, while slot D2 could be equipped with another pack, like an LNW62. Two of the same circuit packs can also populate adjacent slots in the same group, yet certain restrictions apply. For more information on 0x1, including circuit pack/slot equipage restrictions, see Chapter 6, System planning and engineering.
When VLF Mains are used, the 0x1 OCn application is used instead of 0x1Sn functionality. 0x1Sn is still supported when the shelf is equipped with non-VLF Mains. 0x1 is available on both low-speed/tributary packs, and VLF Main (M1/M2) interfaces. When all lines on an OCn pack are set to 0x1, the pack becomes unprotected and the companion slot can be equipped with a different pack.
Alcatel-Lucent 1665 DMX supports GR-1230 compliant VT grooming and squelching on OC-48/192 BLSRs. Alcatel-Lucent 1665 DMX also support the automatic generation of VT squelch maps.
Alcatel-Lucent 1665 DMX supports 1+1 protected linear optical extensions. The high-speed linear optical extension may connect the Alcatel-Lucent 1665 DMX shelf, by way of OC-3/12/48/192 network interfaces in the MAIN slots, to an OC-3/12/48/192 node.
Revertive unidirectional and bidirectional 1+1 are supported, as well as non-revertive.
Beginning in Release 9.0, you can change 1+1 protection group from unidirectional to bidirectional in-service without deleting cross-connections.
Alcatel-Lucent 1665 DMX can host multiple rings on the low-speed interfaces of the Alcatel-Lucent 1665 DMX shelf. Each circuit pack establishes both an east-to-west and a west-to-east rotation on the ring. A UPSR ring provides a very valuable and reliable foundation for services protecting against fiber cuts and node failures.
Alcatel-Lucent 1665 DMX supports UPSRs on all lines of all equipped function group or growth slots.
Alcatel-Lucent 1665 DMX supports 1+1 protected linear optical extensions for data transport originating at a data device. The low-speed linear optical extension may connect the Alcatel-Lucent 1665 DMX shelf, by way of by way of OC-3/12/48/192 tributary interfaces in the Function or Growth slots, to an OC-3/12/48/192 node.
Alcatel-Lucent 1665 DMX supports low-speed OC-3/12/48 0x1 protected broadband tributaries, including single- and dual-homed ring extensions. A DDM-2000 OC-3, OC-12, FiberReach, Alcatel-Lucent 1665 DMXtend, Alcatel-Lucent 1665 DMX, or Alcatel-Lucent 1665 DMXplore may be the add/drop multiplexer on the lower-speed ring.
In "hairpinning" topologies, low-speed tributary traffic is routed into the system and back out without ever being placed on the high-speed (OC-12, OC-48 or OC-192) interfaces. When a VLF Main pack is used, all cross-connects use the switch fabric located on the VLF pack. Any switch fabrics located on low-speed, tributary packs are disabled when VLF Mains are used.
Alcatel-Lucent 1665 DMX supports UPSR DRI. The dual node ring interworking (DRI) cross-connections comply with Telcordia ® GR-1400 (which refers to GR-253-CORE) standards. A service selector exists for each STS-N tributary provisioned for DRI.
Both DRI and dual homed rings are designed to protect against a failure of an interconnecting facility or a failure of the node at which the interconnection occurs. The choice of DRI vs. DHA is driven by the network topology. To provide protection when connecting between two UPSRs, DRI is used. To provide protection when connecting between a UPSR and a single NE, dual homing is used.
Alcatel-Lucent 1665 DMX GbE private lines (1000 Mbps) enable premium data transport services offering GbE transport with optional bandwidth provisioning up to full line-rate. GbE private lines provide the user the ability to transport frames completely transparently between two Alcatel-Lucent 1665 DMX NEs. No VLAN knowledge or packet-layer provisioning is required by the user in this application. Simple, SONET cross-connect provisioning is all that is required when using "Private Line" or "no tag" mode. These GbE capabilities allow the Alcatel-Lucent 1665 DMX to provide dedicated bandwidth for individual customers and fast SONET-layer restoration.
Alcatel-Lucent 1665 DMX Fast Ethernet (10/100 Mbps) private lines enable premium data transport services offering 10/100 Mbps transport with optional bandwidth provisioning up to 100Mbps (variable bandwidth provisioning of 1, 2, or 3 STS1s. Fast Ethernet private lines provide the user the ability to transport frames completely transparently between two Alcatel-Lucent 1665 DMX NEs. No VLAN knowledge or packet-layer provisioning is required by the user in this application. Simple, SONET cross-connect provisioning is all that is required. These Fast Ethernet capabilities allow the Alcatel-Lucent 1665 DMX to provide dedicated bandwidth for individual customers and fast SONET-layer restoration. LNW74 or LNW87 must be used to enable Fast Ethernet private lines.
Alcatel-Lucent 1665 DMX supports Gigabit Ethernet (GbE) packet rings that enable cost-effective Internet access and business-to-business LAN services. GbE packet rings allow interworking among 10/100 Mbps and 1000 Mbps (GbE) Ethernet lines while VLAN tagging ensures individual customer privacy. These GbE capabilities allow Alcatel-Lucent 1665 DMX to support various Quality of Service (QoS) features, including fast packet-layer restoration.
Alcatel-Lucent 1665 DMX allows the provisioning of up to 4093 separate IEEE 802.1q VLANs. VLANs are a way in which LAN users at the enterprise level, located on physically separated LAN networks, are assigned priority access privileges across a WAN backbone. Although they are in different locations, they appear to be on the same physical segment of an enterprise-level LAN. Thus, VLANs are logical groupings of various users, regardless of their physical location on the network.
Alcatel-Lucent 1665 DMX allows customer traffic to be identified and segregated using "stacked" IEEE 802.1q VLAN tags. VLAN tags enable the formation of Virtual Private Networks (VPNs) by segregating various units of traffic and isolating different end-customers. This allows data from different customers to efficiently share common bandwidth while simultaneously ensuring a basic level of security for each customer (hence VPN).
The notion of VLAN "transparency" comes from the fact that individual customer packets are tagged using a second tag, a default port tag (default port tag is provided by customer equipment). There is no need to coordinate VLAN tags between the customer and service provider. Therefore, customer packets are transmitted through a service provider's network "transparently".
Alcatel-Lucent 1665 DMX support Ethernet Ring Protection (ERP) functionality, based on ITU-T G.8032 on the LNW170 circuit pack. This feature provides rapid (50ms) revertive switching for
Physically-connected optical Ethernet links connected in a ring configuration
On VCGs, local signal failure is declared when the VCG is failed or transitions into AUTO state (because all cross-connections have been removed).
WDMX is the name of the family of features that adds metro WDM capabilities to the Alcatel-Lucent 1665 DMX product line. For additional details see, WDMX optical multiplexing network models.
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