ADTRAN Express XLT - Manual (Page 89)

Chapter 3: Terminal Menu Operation and Structure
61200070L1-1 Express XL/XLT User Manual 73
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 for special 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 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