Inter-Tel AXXESS Manual page 1105

Answer Supervision Type
4.373 (Non-T1 Loop Start and E&M only) Answer supervision determines whether the system
should consider a call valid (or disconnected). Available answer supervision types depend on
whether a loop-start or E&M trunk is being programmed, as described below. To set the
Answer Supervision Type select the current Value and scroll to the desired option. Then press
ENTER
•
Non-T1 Loop Start:
—
—
—
•
E&M:
—
—
Connect Trunk-to-Trunk Call on Polarity Reversal
4.374 This is programmed for non-T1 Loop Start and B-channel trunks only. It is located in
System\Devices and Feature Codes\Trunks\<individual trunk>.
•
If the flag is set to Yes, when an ISDN incoming call is made to a loop start trunk
(trunk-to-trunk call), the call will be validated when a polarity reversal is received. The
Inter-Tel system will connect the voice path to hear progress tones and then will send
the ISDN connect message when the loop start polarity reversal is detected.
•
If the flag is set to No, when an ISDN incoming call is made to a loop start trunk (trunk-
to-trunk call), the call will be validated after receiving an end of dialing handshake.
After the handshake, the CO [local exchange] may provide progress tones, such as ring-
back.
Trunks
INTER-TEL
or click outside the field to save your change.
Polarity Reversal: A loop reversal must be received to consider the call valid.
When the first loop reversal is received, the call is made valid immediately, and
the phone display will begin call cost. When a second loop reversal is received,
the system will terminate the call.
NOTE:
If a second loop reversal is not received, the system will not terminate the
call unless the inside party hangs up or loss-of-loop is received from the CO [local
exchange].
Valid Call Timer: After the Valid Call Timer expires, the call is validated. All
polarity reversals received before and after the Valid Call Timer are ignored.
Valid Call Timer with Polarity Reversal: If a loop reversal is received before the
Valid Call Timer expires, the call will be made valid immediately, and the phone
display will begin call cost. When a second loop reversal is received, the system
will terminate the call. If a loop reversal is not received before the Valid Call
Timer expires, the call will be validated by the timer. If a loop reversal is received
after the timer expires, the loop reversal is ignored, but the call cost is reset. If a
second loop reversal is then received, the system will terminate the call.
NOTE:
If a second loop reversal is not received, the system will not terminate the
call unless the inside party hangs up or loss-of-loop is received from the CO [local
exchange].
Off-Hook Debounce Timer: After the Off-Hook Debounce Timer expires, the
call is validated. All polarity reversals received before and after the Off-Hook
Debounce Timer duration are ignored.
Answer Recognition Timer: After the Answer Recognition Timer expires, the
call is validated. All polarity reversals received before and after the Answer Rec-
ognition Timer duration are ignored.
® ®
AXXESS MANUAL VERSION 11.0 – May 2008
Programming
Page 6-255
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