Channelized T1 Port Adapter Installation and Configuration 11
2CT1 Port Adapter Cables and Pinouts
Table 2
2CT1 Port LED Indications
2CT1 Port Adapter Cables and Pinouts
Two standard serial cables, null-modem and straight-through, for the 2CT1 port adapter are available
from Cisco Systems and other vendors. Both cables have a 15-pin, D-shell (DB-15) connector at the
router (VIP2 or Cisco 7200 series) end and at the network end. Figure 6 shows the 2CT1 interface
cable, connectors, and pinouts.
Following are the product numbers for the 2CT1 interface cables:
•
Null-modem cable—CAB-7KCT1NULL(=) or equivalent
•
Straight-through cable—CAB-7KCT1DB15(=) or equivalent
Figure 6
2CT1 Interface Cable
Table 3 lists connector pinouts for the 2CT1 null-modem cable, and Table 4 lists the connector
pinouts for the 2CT1 straight-through cable.
Port LED
Status
LB (loopback)
This green LED comes on when the port is in loopback mode
(line or local). The LED remains off during normal operation
of the port adapter.
LA (local alarm)
This green LED comes on when the incoming signal from a
remote source is out-of-frame (OOF), contains more than one
errored second (ES) signal in a ten-second sampling period, or
there is a loss of the incoming signal (LOS). The LED remains
off during normal operation of the port adapter.
RA (remote alarm)
This green LED comes on when the remote source’s incoming
signal is OOF, contains more than one ES in a ten-second
sampling period, or there is LOS. The LED remains off during
normal operation of the port adapter.
Pin 1
DB-15 connector
Pin 9
Pin 11
Pin 3
72-XXXX-01
MIP
H8665
DB-15 connector