[asterisk-users] Aastra phones cannot transfer calls?

[Ernie Dunbar]

>> On 16 February 2011 00:22, Ernie Dunbar <maillist at lightspeed.ca> wrote:
>>>> At 12:12 PM 2/15/2011, you wrote:
>>>>>I have two Aastra phones, a 6730 and a 6757, both connected to
>>>>> Asterisk
>>>>>v1.6.2.1. They can call each other's extensions (and make and receive
>>>>>calls otherwise), but they cannot transfer calls, not even to outside
>>>>
>>>> I'm running 1.6.2.16.1 and have three Aastra 480i phones and have had
>>>> no problem at all with transfers. Have you considered trying a newer
>>>> version?
>>>>
>>>
>>> Nope. Upgraded to 1.6.2.16.1, and I still see the same effect.
>>>
>>> It may be a setting on the phone or a SIP setting. I'll investigate
>>> this
>>> elsewhere but report back about the solution.
>>>
>>>
>>
>> I also tried this with a 6757i and a 6753i with no problems (blind and
>> attended) on Asterisk 1.6.2.16.1. Have you updated the handset
>> firmware to 2.6.0.2010?
>>
>
> What SIP settings do you have in Asterisk?
>

Actually, I found the problem. "Allowtransfer" is a new SIP setting (it
certainly isn't in sip.conf on the old server) and by default it's set to
"no" globally. Changing this to "yes" fixes the problem.