Gigaset gives a busy message on Transfer (##)

Hi everybody, let me explain you my situation :

  • I have installed a freepbx distribution (FreePBX Framework, Asterisk 10.5.0)
  • I have defined many extensions, IVR, Trunks, etc … everything is working fine
  • I have bought a Gigaset phone C610IP with 2 phones and one basis plugged on my network. I can receive calls from each phone, which are connected to the same asterisk and with 2 differents extensions

So far everything is great !

The strange think is when I want to do a call forwarding from a phone to another phone. I receive a call from an external number (inbound route) or internal extension (an android phone connected with csipsimple) to a gigaset device. I answer, and I can talk. But when I want to transfer it to the other gigaset device I get a busy message.

I can transfer it to any softphone connected, but not to the second device. Note that my extensions are connected with 2 differents ports (IP are same) :

[2012-08-22 12:41:46] VERBOSE[13900] chan_sip.c: -- Registered SIP '3304' at 88.x8x.11.xx:58673 [2012-08-22 12:41:54] VERBOSE[13900] chan_sip.c: -- Registered SIP '3300' at 88.x8x.11.xx:46853

When the first device is on call, I can call the second device from any other account (connected with a softphone) or I can call from the second device to anything.

To try to most extreme case I have done the following :

  • gigaset device 1 receives an external call
  • it transfers it to a connected extension via a softphone
  • this softphone transfers it to the gigaset device 2 => Working

When :

  • gigaset device 1 receives an external call
  • it transfers it to the gigaset device 2 => NOT Working

I get the following message :

[2012-08-22 13:33:27] VERBOSE[13900] chan_sip.c: -- Got SIP response 486 "Busy Here" back from 88.x8x.11.xx:46853 [2012-08-22 13:33:27] VERBOSE[21512] app_dial.c: -- SIP/3300-0000006b is busy [2012-08-22 13:33:27] VERBOSE[21512] app_dial.c: == Everyone is busy/congested at this time (1:1/0/0)

Does somebody has an idea ?

Thanks by advance

It looks like a phone problem. Did you take it up with Siemens support?