Avaya Communication Manager Administrator's Manual page 1567

Valid entries
A
B
A&B
none
A and none
Supplementary Service Protocol
Appears only when trunk group Type is ISDN.
Valid entries
a
b
c
d
e
f
g
Usage
For the TN464B and later circuit packs, indicate which
bits, if any, should be inverted.
For the Japanese 2Mbit trunk circuit pack, indicate
which bits, if any, should be inverted.
Usage
Allows ASAI Flexible Billing.
AT&T, Bellcore, Nortel.
When the Country Code field on the DS1 screen is 1A, SSA selects
AT&T custom supplementary services.
When the Country Code field on the DS1 screen is 1B, SSA selects
Bellcore Supplementary Services.
When the Country Code field on the DS1 screen is 1C, SSA selects
Nortel Proprietary Supplementary Services.
QSIG; also used for SBS signaling trunk groups when full QSIG
functionality is needed.
ETSI
Use c protocol for Network Call Deflection.
ECMA QSIG
Allows ASAI Flexible Billing.
Allows DCS with rerouting. DCS with Rerouting must be y, and the Used
for DCS field on the Trunk Group screen must be y.
Feature Plus
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.
Use g protocol for Network Call Transfer.
Trunk Group
Issue 1 June 2005 1567