Avaya Communication Manager Administrator's Manual page 1205

Supplementary Service Protocol
Indicates which supplementary service protocol to use for services over this trunk group.
Supplementary Service protocols are mutually exclusive.
Valid entries
a
b
c
d
e
f
g
Trunk Hunt
Avaya Communication Manager performs a trunk hunt when searching for available channels
within a facility in an ISDN trunk group. With both ascend and descend, all trunks within an
ISDN trunk group are selected based on this field and without regard to the order in which
trunks are administered within the trunk group. When using ISDN-BRI interfaces, only cyclical
is allowed.
Valid entries
ascend
cyclical
descend
Usage
National
ISO/ETSI QSIG Private Network. Also used for SBS signaling trunks.
ETSI public network
European Computer Manufacturer's Association (ECMA) QSIG private
network (supports only Name Identification and Additional Network Feature
Transit Counter (ANF-TC))
DCS with Rerouting
Do not use the Service Type field entry of dmi-mos or sddn with this
●
option.
Set the Used for DCS field (on page 2) to y.
●
ISDN Feature Plus
Public network feature plus signaling.
ANSI. Available only if, on the System-Parameters Customer-Options
screen, the ISDN-PRI or ISDN-BRI field is y or the Used for DCS field is y.
Usage
Enter to enable a linear trunk hunt search from the lowest to highest
numbered channels.
Enter to enable a circular trunk hunt based on the sequence the trunks
were administered within the trunk group.
Enter for a linear trunk hunt search from the highest to lowest numbered
channels.
ISDN Trunk Group
Issue 2.1 May 2006 1205