ADTRAN 1200070L2 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 XL/XLT stays connected during a probe. Normal- ly route and service tables are exchanged immediately after connection. How- ever, 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 XL/ XLT. 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 XL/XLT supports the IETF standards for the Point-to-Point Pro- tocol. The PPP state machine running in the Express XL/XLT can be fine- tuned to support many applications that can be employed. The configurable items under this menu can be changed from their default values forspecialcases.

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 XL/XLT 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 XL/XLT 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.

Multilink/BACP

Write security: 3; Read security: 5

The Bandwidth Allocation Control Protocol (BACP) and Bandwidth Alloca- tion Protocol (BAP) are used to enhance Multilink PPP. Together, they allow

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