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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 2 Common Control Cards
2.7.6 Data Communications Channel
2.7.6 Data Communications Channel
The DCC features a dedicated data channel of 576 kbps (D4 to D12 bytes) between two nodes in an
ONS 15454 SDH network. Each AIC-I card provides two DCCs, DCC-A and DCC-B, through separate
RJ-45 connectors on the front of the AIC-I. Each DCC can be routed to an individual optical interface
in the ONS 15454 SDH system.
Note DCC connection cannot be provisioned if DCC tunneling is configured on this span.
The DCC ports are standard RJ-45 receptacles. Table 2-17 describes the GCC pin assignments.
3RXN
4RXP
5TXP
6 For future use
Table 2-16 UDC Pin Assignments (continued)
RJ-11 Pin Number Description
Table 2-17 GCC Pin Assignments
RJ-45 Pin Number Description
1TCLKP
2TCLKN
3TXP
4TXN
5RCLKP
6RCLKN
7RXP
8RXN