DSG Technology IM 2000, User Manual

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Chapter 4 Integration with PBX
4-8
∎
To No-Answer Flow The caller will be taken to the call path that handles the
No-Answer situation for the extension, i.e., playing a personal not-available
greeting and asking the caller to leave a message.
∎
To Access a Mailbox. The caller will be taken to the mailbox whose number is
encoded in the string. This is usually used when the mailbox owner wishes to
retrieve his/her messages and calls the voicemail from the extension directly.
9. Click Update for every String defined or modified.
10. Click OK or Apply when done with all the modifications.
Busy Time Lag
Busy Time Lag is most useful when the PBX does not send No-Answer In-Band DTMF
String or sends the same string for No-Answer and Busy situations. In such case, a
countdown parameter is used to determine if the extension status is Busy or No-Answer.
After the call is released, the countdown will start. If the call is bounced back during the
countdown, the extension status will be identified as Busy. If the call is bounced back after
the countdown, the extension status will be identified as No-Answer.
To set up Non-Supervised Mode using Busy Time Lag
1. Choose
System Parameter > PBX Parameters.
2. Click Edit tab, a PBX Parameters dialog page appears.
3. Choose the Non-Supervised tab.
4. Define the following parameters:
Enable Busy Time Lag Checking this box tells IM1200 to start the timeout counter
for every transferred call.
Busy Time Lag
This parameter sets the timeout value for the count down.
5. Click OK or Apply when done with all the modifications.
Setting Up IM1200 in Supervised Mode
The Supervised Mode will be the only transfer mode available for some PBXes. In
Supervised mode, the line is not released while the call is being transferred. IM1200 will
monitor and decipher the signals sent back by the PBX and perform proper operation
accordingly. If the call is picked up by the extension, the line will be released. This transfer
mode will take up the most resource of IM1200. There are two types of signals IM1200 can
monitor: Call Progress Tone (CPT), and DTMF Signal.
Call Progress Tone
Most PBXes send Call Progress Tones while transferring calls to indicate the status of the
transfer.
To set up Supervise Mode using Call Progress Tone Signal
1.
Choose
System Parameters > PBX Parameters.
2. Click Edit tab, a PBX Parameters dialog page appears.
3.
Choose the Supervised tab.