Configuring The T3 Controller To Enable Loopbacks - Cisco PA-MC-2T3+ Installation And Configuration Manual

Chapter 4 Configuring Unchannelized mode for the Cisco PA-MC-2T3+
Table 4-2 Using loopback Commands
loopback local
loopback network line
loopback network payload
1
loopback remote
2
loopback remote line
loopback remote payload
1. Remote loopback mode works with C-bit framing only. The other loopback modes listed above work with C-bit and M13 framing. Refer to the
the Framing Type for the Serial Interface" section on page 4-6
2. These loopback commands are only available when the DSU mode is set to 1, Kentrox mode.

Configuring the T3 controller to Enable Loopbacks

The PA-MC-2T3+ can be configured to respond to or to ignore remote T3 loopback requests sent to it
from the far end T3 equipment. Equipment customer loopback enables the port adapter to respond to
remote T3 loopback commands from the remote T3 equipment while equipment network loopback
causes the PA to ignore remote T3 loopback commands.
equipment [customer | network] loopback
OL-3526-05
Sets the interface into local loopback
mode. Local loopback loops the router
output data back toward the router at the
framer.
Sets the interface into network line
loopback mode. Network line loopback
loops the data back toward the network
(before the framer).
Sets the interface into network payload
loopback mode. Network payload
loopback loops just the payload data back
toward the network at the T3 framer.
Sends a command to the remote T3 device
instructing it to loop itself back toward
the network (before the framer at the
remote T3 device).
Sends a command to the remote Kentrox
to loop itself back toward the network
before the framer.
2
Sends a command to the remote Kentrox
DSU to loop only the payload after the
framer back toward the network.
Router(config)# controller T3 1/0
Router(config-controller)# equipment customer loopback
Remote loopbacks are only available when you use c-bit parity framing.
Note
Router(config)# interface serial
10/0/0
router(config-if)# loopback local
Router(config)# interface serial
10/0/0
router(config-if)# loopback network
line
Router(config)# interface serial
10/0/0
router(config-if)# loopback network
payload
Router(config)# interface serial
10/0/0
router(config-if)# loopback remote
Router(config)# interface serial
10/0/0
router(config-if)# loopback remote
line
Router(config)# interface serial
10/0/0
router(config-if)# loopback remote
payload
for information on configuring C-bit framing.
PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
Configuring an Unchannelized T3 Link
"Setting
4-11