Avaya Communication Manager Administrator's Manual page 1566

Screen Reference
Valid entries
sdn
sub-operator
tandem
tie
wats-max-bnd
Signaling Group
The screen displays this field only when the value of the entry in the Group Type field is sip.
Valid
entries
1 to 650
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 Country Protocol field 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.
1566 Administrator Guide for Avaya Communication Manager
Usage
Software Defined Network (SDN) — an AT&T communications
offering that provides a virtual private network using the public
switched network. SDN can carry voice and data between
customer locations as well as off-net locations.
Presubscribed Common Carrier Operator — provides access to
the presubscribed common carrier operator.
Tandem tie trunks integral to an ETN
Tie trunks — general purpose
Maximum Banded Wats — a WATS-like offering for which a user's
calls are billed at the highest WATS band subscribed to by users.
Usage
Type the number of the SIP signaling group associated
with this trunk group in the Group Number field on the
Signaling Group screen.
2 of 2