Specifications

Troubleshoot the PA-E3 Port Adapter
Configuring Serial Interfaces IC-93
If you need to change any of the default configuration attributes, use the first command in global
configuration mode, followed by any of the optional commands in interface configuration mode:
Troubleshoot the PA-E3 Port Adapter
To set the following loopbacks to troubleshoot the PA-E3 port adapter using Cisco IOS software, use
the first command in global configuration mode, followed by any of the other commands, depending
on your needs:
These loopback commands loop all packets from the E3 interface back to the interface and also
direct the packets to the network.
international bit 0 0
invert data data is not inverted
national bit 0
scramble disabled
Command Purpose
interface serial slot/port-adapter/port
(Cisco 7500 series and Cisco 7000 series routers
with the RSP7000 and RSP7000CI)
or
interface serial slot/port (Cisco 7200 series)
Select the PA-E3 interface and enter interface
configuration mode.
dsu bandwidth kbps Change the DSU bandwidth.
dsu mode {0 | 1} Change the DSU mode. To connect to another PA-E3
port adapter or a Digital Link DSU, use the default
mode (0). To connect to a Kentrox DSU, use mode 1.
framing {g751 | bypass} Change the framing used by the interface.
international bit {0 | 1} {0 | 1} Change the international bit used by the interface.
invert data Invert the data stream on the interface.
national bit {0 | 1} Change the national bit used by the interface.
scramble Enable scrambling on the interface.
Command Purpose
loopback dte Loopback after the LIU toward the terminal.
loopback local Loopback after going through the framer toward the
terminal.
loopback network line Loopback toward the network before going through the
framer.
loopback network payload Loopback toward the network after going through the
framer.
Table 7 PA-E3 Port Adapter Defaults (continued)
Command Default Value