Figure 1-13 Bnc Backplane For Use In 1:1 Protection Schemes; Bnc Connectors - Cisco ONS 15454 Reference Manual

1.5 1.5.3 BNC EIA
type. Use RG-59/U cable to connect to the ONS 15454 BNC EIA. These cables are recommended to
connect to a patch panel and are designed for long runs. You can use BNC EIAs for DS-3 (including the
DS3XM-6 and DS3XM-12) or EC-1 cards.
Figure 1-13
To install coaxial cable with BNC connectors, refer to the "Install Shelf and Backplane Hardware"
chapter in the Cisco ONS 15454 Procedure Guide.
Figure 1-13

1.5.3.1 BNC Connectors

The EIA side marked "A" has 24 pairs of BNC connectors. The first 12 pairs of BNC connectors
correspond to Ports 1 to 12 for a 12-port card and map to Slot 2 on the shelf assembly. The BNC
connector pairs are marked "Tx" and "Rx" to indicate transmit and receive cables for each port. You can
install an additional card in Slot 1 as a protect card for the card in Slot 2. The second 12 BNC connector
pairs correspond to Ports 1 to 12 for a 12-port card and map to Slot 4 on the shelf assembly. You can
install an additional card in Slot 3 as a protect card for the card in Slot 4. Slots 5 and 6 do not support
DS-3 cards when the standard BNC EIA panel connectors are used.
The EIA side marked "B" provides an additional 24 pairs of BNC connectors. The first 12 BNC
connector pairs correspond to Ports 1 to 12 for a 12-port card and map to Slot 14 on the shelf assembly.
The BNC connector pairs are marked "Tx" and "Rx" to indicate transmit and receive cables for each
port. You can install an additional card in Slot 15 as a protect card for the card in Slot 14. The second
12 BNC connector pairs correspond to Ports 1 to 12 for a 12-port card and map to Slot 16 on the shelf
assembly. You can install an additional card in Slot 17 as a protect card for the card in Slot 16. Slots 12
and 13 do not support DS-3 cards when the standard BNC EIA panel connectors are used.
When BNC connectors are used with a DS3N-12 card in Slot 3 or 15, the 1:N card protection extends
only to the two slots adjacent to the 1:N card due to BNC wiring constraints.
Cisco ONS 15454 Reference Manual, R7.0.1
1-18
shows the ONS 15454 with preinstalled BNC EIAs.
BNC Backplane for Use in 1:1 Protection Schemes
B
16 14
TX RX TX RX TX RX TX RX
1 7 1 7
2 8 2 8
3 9 3 9
4 10 4 10
5 11 5 11
TX RX TX RX TX RX TX RX
6 12 6 12
A
4 2
TX RX TX RX TX RX TX RX
1 7 1 7
2 8 2 8
3 9 3 9
4 10 4 10
5 11 5 11
TX RX TX RX TX RX TX RX
6 12 6 12
Chapter 1 Shelf and Backplane Hardware
BNC backplane
connectors
Tie wrap posts
OL-9217-01