ADTRAN L128T Probe/Update Window, Connection List/PPP, PPP/Multilink, Multilink/Mode

Chapter 3: Terminal Menu Operation and Structure

Probe/Update Window

Write security: 3; Read security: 5

This is the time the Express L128/L128T stays connected during a probe. Nor- mally route and service tables are exchanged immediately after connection. However, some routers could wait until their regular RIP or SAP time period has been reached before they advertise their routes or services to the Express L128/L128T. The value is in seconds and ranges from 5 to 180. The default is 5 seconds and assumes that a routing update is received upon connection.

Connection List/PPP

The Express L128/L128T supports the IETF standards for the Point-to-Point Protocol. The PPP state machine running in the Express L128/L128T can be fine-tuned to support many applications that can be employed. The config- urable items under this menu can be changed from their default values for spe- cial cases.

PPP/Multilink

Multilink PPP allows the two B-channels to be used together for increased bandwidth.

Multilink/Mode

Write security: 3; Read security: 5

When this item is set to On (def), Multilink PPP is negotiated with the PPP peer. When Off, the Express L128/L128T will only allow one B-channel for this connection.

Multilink/Fragment Write security: 3; Read security: 5

When this item is set to Yes (def), the Express L128/L128T will split outgoing packets greater than 128 bytes into two Multilink fragments and simulta- neously transmit them one per B-channel. The receiving PPP peer will then re- assemble them. This decreases the transport delay. However, some legacy equipment might have trouble handling fragmented packets, in which case this option should be set to No.

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