Vocality V100 Technical Manual page 111

C H A P T E R 3 C O N F I G U R I N G V 1 0 0
US 'S' PMP, NI-1 ISDN, Auto SPID Entry with SPID Guessing.
Only one SPID is supported. In this case, SPID guessing requires the user to enter the LDN field only. This
enables the switch to guess against a likely or similar SPID to reduce the response time. This mode is
recommended. The SPID 1 field is set to SPID guessing format with the code above. The ISDN Terminal
Adaptor is programmed as above. The Auto SPID status is updated to give an indication of the Network
Auto Switch response, once a call is made and the SPID/LDN fields are updated if a SPID response is
received from the network. The SPID/LDN values are not saved in the Configuration.
BOD
The BoD settings control the ISDN call management strategy when the secondary routing mode is set to
BoD. The Bandwidth on Demand (BoD) feature continually monitors the level of traffic that is routed
through the ISDN interface, and raises and clears the second bearer as required and configured. The
traffic levels are calculated with a damping factor to avoid unnecessary dial and clear events in bursty
traffic situations. The lower the damping factor the faster the V100 is to react to changes in traffic
patterns (at the cost of potentially unexpected dial/clear events in bursty networks). When the dampened
traffic level exceeds the dial threshold the second bearer is dialled. Once established, traffic is split
between the two bearers. When both bearers are established and the dampened traffic level drops below
the configured clear threshold, all traffic is routed over the first bearer channel. The second bearer is
dropped if the dampened traffic level remains below the dial threshold for the secondary activity timer.
The parameters and options are shown in the following table:
V100 Versatile Multiplexer Technical Manual Version 2.2
Page 111 of 231