Administrator's Guide

Trunk Group
Issue 5 October 2002 1257555-233-506
NOTE:
When you set this field to y, the Outgoing End of Dial (sec) field is not
displayed. The firmware timeout on circuit packs controlled by the
Outgoing End of Dial (sec) field is automatically set to
0.
Receive Release Ack
This field appears when the Trunk Signaling Type field is cont or dis and only
applies to TN2140 ports (used for Italian and Hungarian tie trunks).
Send Answer Supervision
This field appears when the Trunk Signaling Type field is cont or dis and only
applies to TN2140 ports.
Send Release Ack
This field appears when the Trunk Signaling Type field is cont or dis and only
applies to TN2140 ports (used for Italian and Hungarian tie trunks).
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 switch can
understand your switch’s seizure and release signals. If the far-end switch, such as
a central office, on this trunk group interprets the A- and B-bits differently from
Valid entries Usage
y/n
Enter y if the switch will receive a release acknowledgment
in response to a forward or backward release signal.
Valid entries Usage
y/n
Enter y to make your switch signal the calling switch when
an incoming call is answered. You can only set this field to
y
if the Direction field is
incoming or two-way.
Valid entries Usage
y/n
Enter y to send a release acknowledgment in response to a
forward or backward release signal.