Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations Mike Lewis on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

Call forwarding not working right on a SIP extension?

Siemens/Rolm

Call forwarding not working right on a SIP extension?

by  LoPath  Posted    (Edited  )
This was on a HiPath 4000 V5.

What was happening was that if a SIP station was busy, incoming calls from Sprint phones would get a busy indication and not use call forwarding (to go to voicemail or another line).

The SIP station was setup originally for forwarding using service type “SPR- voice (DSS1)”. When we added service type “TEL3K1 – telephony (3,1 khz, anate)” then the forwarding would work. Conversely, if we removed SPR and left TEL3K1, then only Sprint callers could get through. I killed a couple more brain cells and found that Sprint is sending a progress message in the ISDN SETUP message indicating the “Origination address is non-ISDN”, which was not in the SETUP message from an AT&T call. So I suspect this was the cause. Alternatively, you COULD just enable every forwarding type!
Register to rate this FAQ  : BAD 1 2 3 4 5 6 7 8 9 10 GOOD
Please Note: 1 is Bad, 10 is Good :-)

Part and Inventory Search

Back
Top