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Author Topic: ringback  (Read 1727 times)

Offline mah437

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ringback
« on: June 30, 2015, 09:54:19 AM »
have searched the forum and have not found a solution for my issue.  When an internal caller makes a call or is transferred they are getting no ringback. I have checked the "Music on Hold on Transfer" and they are all set to No.   
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Offline ralph

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Re: ringback
« Reply #1 on: June 30, 2015, 03:20:12 PM »
Let me be sure I understand the call flow.

User A has a caller on line, presses xfer, dials user B and then releases the caller to user B.

Who is not hearing ring back?   The person being transferred or User A?

Is User B on the phone when the call is released or is the phone idle?

Ralph
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Offline ralph

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Re: ringback
« Reply #2 on: June 30, 2015, 04:02:48 PM »
It just so happened that I stumbled across something on MOL.
This is regarding Level 3 and their SIP trunks.

Quote
Unsupervised Transfer

When doing an unsupervised transfer of call that originated on the
trunk there is no audible ringback to the callee during the
unsupervised transfer.

Recommendation: Level 3 does not support PRACK, support of
PRACK should fix this issue. Please contact Level 3 for updates on
PRACK support. Level 3 does support blind transfer using the web
portal. You can support the desired call behavior by hairpinning media
through the customer’s network before answer with something like a
conference port or T1 loop.

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