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Configuring MCE1 and MCT1 Services

117345-B Rev. 00

7-15

Accepting or Rejecting Port Loopback Requests

By default, the MCT1 port accepts requests from a remote device to go into

loopback mode. During loopback, the port loops receive data back onto the T1

transmit path. The remote or intermediate test equipment then performs

diagnostics on the network between the equipment and the port.

You can disable detection of remote loop-up and loop-down code to prevent the

port from accepting loopback requests. With Accept Loopback Request enabled,

see “Setting a Loopback Configuration” to set the type of loopback.

See the Accept Loopback Request parameter on page A-33

for information.

Setting a Loopback Configuration

Setting this parameter immediately places the port in loopback mode, without a

request from the remote test equipment. Set the loopback configuration by

specifying one of the following options:

• Payload Loopback -- Received signals are looped through the T1 framer, then

looped back for retransmission. This method maintains bit-sequence integrity

for information bits, but does not maintain the integrity of frames or

superframes.

• Line Loopback -- Received signals do not go through the framing device

before being looped back out. This method ensures minimum penetration.

• No Loopback (the default) -- This option deactivates any current loopback.

See the Loopback Configuration parameter on page A-33

for information.

Setting the Source of Send Performance Messages

On DMCT1 net modules and QMCT1 or QMCT1 w/ DS0A link modules only,

you can specify the source of send performance messages:

• Customer Inst -- Indicates that the customer installation supplies the messages

• Carrier -- Indicates that the carrier supplies the messages

See the Send Performance Measurement CR Addr parameter on page A-34

for

information.

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Avaya Configuring WAN Line Services Manual do Utilizador Página 127