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FAQ-How to Configure Cross-Connections Between RX TXs and LP Paths for a TOM Board in Case of Interconnection Between a TOM Board on the OptiX OSN 6800 and an LDGF Board on the OptiX OSN 1800

Publication Date:  2012-07-25 Views:  55 Downloads:  0
Issue Description

Q:

A TOM board on an OptiX OSN 6800 NE is interconnected with an LDGF board on an OptiX OSN 1800 NE on a network. A bidirectional GE service is configured between the two NEs. For the LDGF board, the cross-connections between RX/TXs and LP paths are already configured. For the TOM board that is in tributary-line mode, however, the cross-connections between RX/TXs and LP paths need to be configured. Then, how to configure the cross-connections for a TOM board to transmit services successfully?

 
Alarm Information
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Handling Process

A:

1. Configuring principle: The RX1/TX1 to RX4/TX4 (the corresponding interface number on the NM is 3, 4, 5, and 6) on the LDGF board are cross-connected to path 1-4 of LP1 port on the TOM board. That is, RX1/TX1 (3) is cross-connected to LP1.1, RX2/TX2 (4) is cross-connected to LP1.2, RX3/TX3 (5) is cross-connected to LP1.3, and RX4/TX4 (6) is cross-connected to LP1.4.
2. A TOM board that is in tributary-line mode and in non-cascading mode is used as an example. RX1/TX1 to RX4/TX4 on the TOM board are client-side interfaces, and RX5/TX5 to RX8/TX8 on the TOM board are WDM-side interfaces. Assume that GE service signals from the LDGF board are dropped on a D40 board of the OptiX OSN 6800, and the TOM board receives the signals on the WDM-side RX5/TX5 and outputs them on the client-side RX1/TX1.

If a GE service is added on the LDGF board by RX1/TX1 (3), on the TOM board, RX1/TX1 should be cross-connected to LP1.1.

If an FE service is added on the LDGF board by RX4/TX4 (6), on the TOM board, RX1/TX1 should be cross-connected to LP1.4.
3. RX1/TX1 to RX2/TX2 on the LDGF board are always for GE services, and RX3/TX3 to RX4/TX4 on the LDGF board are always for FE services. Therefore, according to the preceding configuring principle, if an FE service is added on the LDGF board, you cannot configure RX/TX to cross-connect to a LP port with only two paths for the TOM board.
 
Root Cause
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Suggestions
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