Specifications

4-38
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
DS1-14 Card
4.12 DS1-14 Card
The ONS 15454 DS1-14 card provides 14 Telcordia-compliant, GR-499 DS-1 ports. Each port operates
at 1.544 Mbps over a 100
ohm twisted-pair copper cable. The DS1-14 card can function as a working or
protect card in 1:1 protection schemes and as a working card in 1:N protection schemes. Figure 4-14
shows the DS1-14 faceplate and a block diagram of the card.
Figure 4-14 DS1-14 faceplate and block diagram
You can install the DS1-14 card in any multispeed or high-speed card slot on the ONS 15454. Each
DS1-14 port has DSX-level (digital signal cross-connect frame) outputs supporting distances up to 655
feet.
The DS1-14 card supports 1:1 protection. The DS1-14 can be a working card in a 1:N protection scheme
with the proper backplane EIA and wire-wrap or AMP Champ connectors. You can also provision the
DS1-14 to monitor for line and frame errors in both directions.
You can group and map DS1-14 card traffic in STS-1 increments to any other card in an ONS 15454
except DS-3 cards. Each DS-1 is asynchronously mapped into a SONET VT1.5 payload and the card
carries a DS-1 payload intact in a VT1.5. For performance monitoring purposes, you can gather
bidirectional DS-1 frame-level information (loss of frame, parity errors, cyclic redundancy check [CRC]
errors, etc.).
Cross
Connect
14 Line
Interface
Units
STS1 to
14 DS1
Mapper
Matrix
FLASH
DRAM
Mux/Demux
ASIC
Protection
Relay
Matrix
STS-1 / STS-12
uP
BTC
ASIC
61345
B
a
c
k
p
l
a
n
e
FAIL
ACT/STBY
DS1-
14
SF
33678 12931