SONET clear channel applications
Overview
Ports on OC-n cards can be used for SONET clear channel applications. SONET or TDM clear channel applications allow you to create a full channel on a port which can be configured as access or network mode for SONET and access only for TDM. For example, when you create a 16 × OC3 SFP card, 16 ports are created. You can create one full channel on each of these ports. For more information about the 4 × OC3/STM1 ASAP SFP and 4 × Channelized OC3/OC12 ASAP SFP adapter cards for clear channel support, see OC3/STM1 clear channel support on the 7705 SAR-8 and 7705 SAR-18 in this section.
STS-192/48/12/3 clear channel applications use the following syntax:
card slot/daughtercard/port.STSType
For example, the clear channel STS-12 on slot 4, MDA 1, port 1 is named 4/1/1.sts12
The following table lists available SONET channel applications and parameters for clear channel, sub-channel, and TDM applications.
Table 16-2: SONET channel parameters
|
Applications |
Channel ranges | ||||||||
|---|---|---|---|---|---|---|---|---|---|
|
STS-192 |
STS-48 |
STS-3 |
STS-1 |
DS3 |
DS1 |
DS0 |
E1 |
DS0 | |
|
SONET Clear channel |
1 |
1 |
1 |
1 |
|||||
|
SONET Sub channel |
1 to 4 |
1 to 3 |
1 |
1 to 28 |
1 to 24 |
1 to 21 |
2 to 32 | ||
|
TDM |
1 |
1 to 28 |
1 to 24 |
1 to 21 |
2 to 32 | ||||
OC3/STM1 clear channel support on the 7705 SAR-8 and 7705 SAR-18
The 7705 SAR-8 and 7705 SAR-18 support the 4 × OC3/STM1 ASAP SFP card. The 4 × OC3/STM1 ASAP SFP card has four SFP-based ports that can be independently configured for ATM in access mode or for Packet over SONET/SDH (POS) in network mode. Each port can be independently configured to be SONET (OC3) or SDH (STM1) framing. See ATM encapsulation in this section for more information. The interface must be configured as UNI. The transmit clock rate for a port can be device- or loop-timed.
Note: Channels on the 4 × OC3/STM1 ASAP SFP adapter card cannot be configured as IES SAPs.
The section trace (J0) byte can be configured by the operator to check the physical cabling. The port can activate and deactivate local line and internal loopbacks. The MTU size for a 4-port OC3/STM1 ASAP SFP access port is fixed at 1572 for ATM encapsulation.
CSM activity switches for a 4-port OC3/STM1 ASAP SFP card on the 7705 SAR-8 and 7705 SAR-18 are hitless on the data path.
The 7705 SAR-8 and 7705 SAR-18 support the 4 × Channelized OC3/OC12 ASAP SFP adapter card. In OC3 mode, the card supports path sts3 under SONET and path sts3 with payload sts3 under SDH for clear channel POS and network APS. In OC12 mode, the card supports sts3 and sts12 under SONET and SDH for clear channel POS and network APS.
The 7705 SAR-8 and 7705 SAR-18 support the 2-port OC3/STM1 ASAP SFP card. The 2-port OC3/STM1 ASAP SFTP card has two SFP-based ports (optical or electrical) that can be configured for ATM/IMA or TDM in access mode or for MLPPP in access or network mode. The port type must be configured to be either SONET (OC3) or SDH (STM1).