Avaya Communication Manager Administrator's Manual page 1282

Screen Reference
Trunk Group
Sig Bit Inversion
When transmission facilities use bit-oriented signaling (such as CAS), 2 bits are used to transmit seizure
and release signals for calls. Called the A-bit and the B-bit, their meaning can vary. For example, in the
A-bit a "1" might mean on-hook and a "0" might mean off-hook. The entry in the
on the DS1 Circuit Pack screen sets the default meaning of these bits.
For trunk ports on TN2242 and TN464B and later circuit packs, this field allows you to invert the A- and
B-bits as necessary so that the far-end server/switch can understand seizure and release signals from
Communication Manager. If the far-end media server or switch, such as a central office, on this trunk
group interprets the A- and B-bits differently from the default, you may need to invert one or both bits —
to change "1" to "0" and vice-versa in the A-bit, for example.
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
1282
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
AT&T custom supplementary services.
When the Country Code field on the DS1 screen is
Bellcore Supplementary Services.
When the Country Code field on the DS1 screen is
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. For more information, see
Avaya MultiVantage™ Call Center Software Release 11 — Network
Call Redirection.
ECMA QSIG
Administrator's Guide for Avaya Communication Manager
Country Protocol
, SSA selects
1A
, SSA selects
1B
, SSA selects
1C
November 2003
field