RAD Data comm IPmux-1 Manuel D’Utilisation

Chapter 4 Troubleshooting and Diagnostics

IPmux-1/1E Installation and Operation Manual

4-4 Diagnostic Tests

PBX

IPmux-1

Figure 4-1. IPmux-1 External Loop

Internal Loop

The E1/T1 module can be set to an internal loop to test the connection between

the E1/T1 port and the IP network (refer to Chapter 3). In this mode (E1/T1 only),

data coming from the IP network is both looped back to the IP network and an AIS
pattern is transmitted forward to the PBX connected to the E1/T1 port (see

Figure 4-2).

PBX

AIS

IPmux-1

Figure 4-2. IPmux-1 Internal Loop

➤

To run a loopback test:

• Press the <Spacebar> on your keyboard to toggle between the values:

Internal/External /Disable

− Internal: Data received from the IP network side is looped back to the

network transmit line. An unframed all ‘1’ code (AIS) is transmitted in the
E1 Tx path toward the PBX. Incoming data from the PBX is ignored.

− External: Data received from the PBX at the receive E1 line is looped back

to the E1 Tx path (toward the same PBX), and continues its way to the
IP network. Data coming from the IP network is ignored.

− Disable: No loopback. Regular operation.

Default value: Disable

BRI

External Loop

An external loop on IPmux-1E can be set to test the ISDN “S’ line (Figure 4-3). The

test is performed on B channels only.

IPmux-1

ISDN S

Figure 4-3. IPmux-1E/BRI External Loop

Internal Loop

An internal loop on IPmux-1E can be set to test the ISDN “S’ line (Figure 4-4). The

test is performed on B channels only.

Main Menu
↓

2. Configuration
↓

2. E1/T1
Configuration
↓

3. Loopback

State

Order from: Cutter Networks

Ph:727-398-5252/Fax:727-397-9610