27 Feb
2011
27 Feb
'11
9:35 p.m.
Hi,
Can you tell me what advantage on INVITE has against REFER?
REFER is a kind of blind transfer and INVITE in sipXbridge is 3PCC?
Thanks in advance.
Youngjin
On Sun, Feb 27, 2011 at 6:40 AM, Grzegorz Stanislawski <
stangrze(a)netitel.pl> wrote:
Hi.
We have proverb for this, i don't know english version but it goes like
this:
"When it isn't known what it's all about, it's about money"
Your ITSP had troubles with proper handling second transfer for billing
purposes so decided to disable it.
Proxy doesnt participate in call transfer, but ITSP it must charge users
properly: Alice should pay just for call to Bob, Bob for "his" call to
Charlie and so on.
If You are using sipX You should use sipXbridge, it replaces REFER with
INVITE and bridges calls.
Grzegorz Stanislawski
W dniu 2011-02-25 11:40, niklas rehnberg pisze:
Hi,
Thank for the quick response.
The issue occur only when the Alice is a PSTN client.
My ITSP says that they only supporting one call transfer (very strange).
They can not explain why etc...
PSTN client: Alice
MGW/MGC(ITSP): Cisco/SER
Our sip server: SIPX
BR Niklas
2011/2/25 Iñaki Baz Castillo <ibc(a)aliax.net <mailto:ibc@aliax.net>>
2011/2/25 niklas rehnberg <niklas.rehnberg(a)gmail.com
<mailto:niklas.rehnberg@gmail.com>>:
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Hi,
Have following issue:
Alice calling Bob.
Bob make call transfer to Charlie (works fine)
Charlie transfer Alice to David. (the call break)
Why is not possible to transfer the call more than one time?
Is it any parameters?
My ITSP use SER together with Cisco MGW.
Niklas, nothing in SIP protocol neither in SER/Kamailio makes your
scenario to fail. It must be a problem in your custom setup. Try
identifying the problem capturing SIP traces.
Also take into account that a proxy doesn't participate at all in the
process of a "call transfer". It's just a transparent mechanism for a
proxy.
--
Iñaki Baz Castillo
<ibc(a)aliax.net <mailto:ibc@aliax.net>>
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