User`s guide

SFVRA Connection Manager 71
C ONFIGURING U SERS
Access
CyberSWITCH is found which has at least two more free channels than the CyberSWITCH that
received the call, SFVRA-CONN instructs a selected CyberSWITCH to re-establish a connection to
this user.
Note: In order for the Callback feature to work properly, the user must be properly configured
for Dial Out, and call restrictions must be disabled, or non-zero values must be configured
for outgoing calls.
E
NABLE
Select this option if this user is to negotiate compression during WAN communication. Combinet
Compression is used if the “Layer 2 Protocol” is CPP, standard compression is used if the PPP has
been selected. This feature is optional.
S
TARTING PPP STAC-LZS NUMBER
Default value is 1. When using PPP Compression with the STAC-LZS protocol, a sequence-
numbering scheme can be used whose initial value is required to be 1 by the protocol specification.
Some devices from other vendors do not start with 1. This results in a resynchronization sequence
on the first frame that is exchanged. When the user device fully supports the CCP protocol’s Reset
mechanism, this will only result in the minor inconvenience of a lost frame at the beginning of a
session. However, if such a device’s resynchronization mechanism is to completely renegotiate
CCP, this sequence will repeat infinitely.
This option provides an escape mechanism to allow interworking with such devices by modifying
the initial PPP STAC sequence number.
The Starting PPP STAC Sequence Number is maintained for each user. The value that appears on
this configuration screen provides the default value for the per-user value. When you add a new