Can only tranfer (refer) a call one time - sr-users - kamailio.org

List overview All Threads
Download

Can only tranfer (refer) a call one time

how to route to new URI on failure

Lcr Command Disabled

niklas rehnberg

25 Feb 2011 25 Feb '11

9:21 p.m.

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. BR Niklas

Attachments:

attachment.html (text/html — 444 bytes)

Reply

Show replies by date

Iñaki Baz Castillo

25 Feb 25 Feb

9:28 p.m.

2011/2/25 niklas rehnberg <niklas.rehnberg(a)gmail.com>om>:

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>

Reply

Carsten Bock

9:34 p.m.

Hi, also you should check, what your ITSP really supports. I don't think our Cisco PGW's here at Telefonica Germany supports properly Call-Transfer and it is absolutely ok, since we are providing Class 4 services and not Class 5 services (which would be handled by our Class 5 infrastructure). Call-Transfer ist a typical Class 5 feature which is normally supported by a PBX and not natively by a class 4 infrastructure. Kind regards, Carsten 2011/2/25 Iñaki Baz Castillo <ibc(a)aliax.net>et>:

2011/2/25 niklas rehnberg <niklas.rehnberg(a)gmail.com>om>:

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> _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

-- Carsten Bock Schomburgstr. 80 22767 Hamburg Germany Mobile +49 179 2021244 Home +49 40 34927217 Büro (Verl) +49 5246 801427 Fax +49 40 34927218 mailto:carsten@bock.info

Reply

niklas rehnberg

9:40 p.m.

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>

2011/2/25 niklas rehnberg <niklas.rehnberg(a)gmail.com>om>:

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>

Reply

Grzegorz Stanislawski

28 Feb 28 Feb

1:40 a.m.

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>>:

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>> _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

Reply

5099

days inactive

5101

days old

sr-users@lists.kamailio.org

Manage subscription

4 comments

4 participants

tags (0)

participants (4)

Carsten Bock
Grzegorz Stanislawski
Iñaki Baz Castillo
niklas rehnberg