1213-06: Loopback Mode [System: Ports: Slot x: T1/PRI Slot Configuration (1213): Loopback]

Use this option to enable T1 PCB loopback. Although loopbacks are generally used for factory testing, you may find Remote and Payload Loopback helpful for on-site troubleshooting. The available loopback entries are:

None

• Loopback is not enabled.

Metallic

• This option loops the T1 PCB internal analog output to the PCB internal analog input. The PCB external (telco side) connection is isolated during this test. Metallic Loopback is not normally used as a field test.

Digital

• This option loops the T1 PCB internal digital output through the PCB’s framer chip and then back to the PCB internal digital input. Digital Loopback is not normally used as a field test.

Remote

• This option loops any analog signal on the T1 PCB external (telco side) receive tip and ring to the external (telco side) transmit tip and ring. Remote Loopback may be useful for field testing because it loops any analog test signal on the PCB receive tip and ring back to the transmit tip and ring.

ST-Bus

• This option loops the T1 PCB internal digital output to the PCB internal digital input. It does not loop back through the framer chip. ST-Bus Loopback is not normally used as a field test.

Payload

• This option loops any digital signal on the T1 PCB external (telco side) receive tip and ring to the external (telco side) transmit tip and ring. Payload Loopback may be useful for field testing because it loops any digital test signal on the PCB receive tip and ring back to the transmit tip and ring.

Features Related to this Program

Telephone Features

• T1 Lines

IntraMail Features

• None

Program Options