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»» Frame Relay/Maintenance Protocol
Write security: 3, Read security: 5
The Frame Relay maintenance protocol is used on the WAN port. The
maintenance protocol is used to send link status and virtual circuit in-
formation between Frame Relay switches and other devices (such as
routers) that communicate with them. Possible choices are listed be-
low.
Annex D (def) This is an ANSI standard and is the most com-
monly used standard in the US.
This is the CCITT European standard.
Annex A
LMI
This was developed by a vendor consortium
and is also known as the "consortium" man-
agement interface specification. It is still used
by some carriers in the U.S.
This should be selected when there is no Frame
Static
Relay switch in the circuit. The DLCIs are as-
signed in the DLCI Mapping and must be the
same for the device it will communicate with.
»» Frame Relay/Polling Frequency
Write security: 3, Read security: 5
This parameter is the interval that the Express L768 polls the Frame
Relay switch using the maintenance protocol selected above. The Ex-
press L768 is required to poll the Frame Relay switch periodically to
determine whether the link is active. The value is in seconds and rang-
es from 5 to 30 seconds with a default of 15 seconds.
»» Frame Relay/DLCI Mapping
This menu allows each DLCI to be mapped to a particular Frame Re-
lay maintenance protocol. Each protocol parameter can be individu-
ally configured for each DLCI. By factory default, the DLCI map is
empty.
When empty and a maintenance protocol other than static is used, the
Express L768 will poll the switch to determine which DLCIs are active.
61203192L1-20
Chapter 3. Terminal Menu Operation and Structure
Express L768 User Manual
3-37
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