User guide

Phone and System Administration
Individual Trunk Programming Options
Mitel
®
5000 CP Administrator Phone Guide – Issue 3.2, September 2009 Page 25
Individual Trunk Programming Options
You can program the following individual trunk options:
• “Programming the Trunk Answer Supervision Type” below
• “Programming Caller ID” on page 27
• “Programming the Hybrid Balance Option” on page 28
• “Programming DTMF or Dial Pulse Signalling” on page 29
• “Programming Trunk Group Assignments” on page 30
• “Programming the Busy Trunk Option” on page 31
See Figure 3 on page 36 for the Trunk Database flowchart.
Programming the Trunk Answer Supervision Type
Answer Supervision determines whether the system should consider a call valid when it
receives polarity reversal from the CO, or wait for the Valid Call timer to expire. Any outside call
put on hold becomes valid immediately, regardless of Answer Supervision or Valid Call timer
status. There are three Answer Supervision Type options:
• 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
shows the call cost. When a second loop reversal is received, the system terminates the
call. If a second loop reversal is not received, the system does not terminate the call
unless the inside party hangs up or loss-of-loop is received from the telephone company.
• Valid Call Timer: The call is validated after the Valid Call Timer expires. 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 shows
call cost. When a second loop reversal is received, the system terminates the call. If a
loop reversal is not received before the Valid Call Timer expires, the call is made valid 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 terminates
the call. 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 telephone company.
See page 26 for programming instructions.