IPmux-1/1E Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics
Diagnostic Tests 4-5
IPmux-1
ISDN S
Figure 4-4. IPmux-1E/BRI Internal Loop
To run a loopback test:
Press the <Spacebar> on your keyboard to toggle between the values:
Internal/External /Disable.
Internal: Data rece ived from the IP network side is looped back to the
network transmit line.
External: Data rece ived from the PBX at the receive ISDN S line is looped
back to the ISDN S Tx path (toward the same PBX). Data coming from the
IP network is ignored.
Disable: No loopback. Regular ope ration.
Default value: Disable
FXS

Remote Loopback

You can set a remote loopback analog signal, per port, in IPmux-1E with FXS
interface. The analog signal is looped back towards the IP network.

Tone Injection

A 1 kHz tone, per port, is injected towards the local telephone set.
To run a test:
Press the <Spacebar> on your keyboard to toggle between the values:
Remote Loopback/Tone Injection/Disable.
Default value: Disable
Main Menu
2. Configuration
2. ISDN
Configuration
3. Channel
Configuration
1. Choose
Channel
3. Loopback
State
Main Menu
2. Configuration
2. ISDN
Configuration
3. Channel
Configuration
1. Choose
Channel
5. Testing
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