Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP) Guía De Diseño

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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. 
 

 
The ONS 15454 high-density BNC EIA supports 48 DS-3 circuits on each side of the ONS 15454 
(48 transmit and 48 receive connectors).  If you install BNC EIAs on both sides of the unit, the 
ONS 15454 hosts up to 96 circuits.  The high-density BNC EIA supports Trompeter UCBJ224 (75 
ohm) 4 leg connectors (King or ITT are also compatible).  Use straight connectors on RG-59/U 
cable to connect to the high-density BNC EIA.  Cisco recommends these cables for connection to 
a patch panel; they are designed for long runs.  You can use high-density BNC EIAs for DS-3 
(including the DS3XM-6) or EC-1 cards. Figure 6-18 shows the ONS 15454 with pre-installed 
high-density BNC EIAs.