Bruce,
What you asked earlier and what you are asking now seems different. If you
just need to check if a trunk has a channel available,
For latter, you can simply use groups and function group_count in your
dialplan. Something like
exten => _X.,n,GotoIf($[GROUP_COUNT(gvbridge) = 0]?:gvinuse);
exten => _X.,n,Set(GROUP()=gvbridge);
...
exten => _X.,n,Hangup()
exten => _X.,n(gvinuse),Swift("All channels are busy.")
exten => _X.,n(gvinuse),Hangup() ; Put a busy signal later
Another option is to use CHANNELS function and filter out the how many
channels is being used in that trunk.
Can you elaborate on why you need to know the codec on a channel? It seems
you just need to know if a channel is available or not.
On 10-06-21 1:10 AM, "Bruce N" <[email protected]> wrote:
>
> Remzi,
>
>
>
> Thanks for pointing me to that. That's amazing but it only outputs the dialed
> channel related info.
>
>
>
> exten => s,1,Answer()
> exten => s,n,Set(foo=${CHANNEL(audioreadformat)})
> exten => s,n,NoOp(${foo})
>
> That sets $foo = ulaw and it's perfect except for I don't need the channel
> info for what I just dialed in but rather those of another channel that may or
> may not be in progress is need.
>
>
>
> In a nutshell, it's a DISA. Caller A calls into the system and is verfied by a
> PIN. Afterwards, the dial-plan should check to see if a Specific dialout trunk
> is available (as in there are no channels on that Trunk at all) and then place
> a call out through that channel. So, the info gather by function CHANNEL won't
> help me since it's only related to the DISA-in CHANNEL rather than those of
> the trunk that I mentioned.
>
>
>
> Or maybe there is a way to do it and I have to put some other variable in
> CHANNEK(???)?
>
>
>
> Thanks again,
>
> Bruce
>
>
>> Date: Sun, 20 Jun 2010 23:35:25 -0400
>> From: [email protected]
>> To: [email protected]
>> Subject: Re: [on-asterisk] How to check in dial-plan for a specific codec if
>> it's being used?
>>
>> Wouldn't this do the trick?
>>
>> http://www.voip-info.org/wiki/view/Asterisk+func+channel
>>
>> Synopsis:
>> CHANNEL(item)
>>
>> Description:
>> Gets/set various pieces of information about the channel. (New in 1.4)
>>
>> item may be one of the following:
>> Read/write Item Description
>> R/O audioreadformat format currently being read
>> R/O audionativeformat format used natively for audio
>> R/O audiowriteformat format currently being written
>> R/W callgroup call groups for call pickup
>> R/O channeltype technology used for channel
>> R/W language language for sounds played
>> R/W musicclass class (from musiconhold.conf) for hold music
>> R/O state state for channel
>> R/W tonezone zone for indications played
>> R/O videonativeformat format used natively for video
>>
>> Items available in 1.6:
>> Standard items (provided by all channel technologies) are:
>> Read/write Item Description
>> R/O audioreadformat format currently being read
>> R/O audionativeformat format used natively for audio
>> R/O audiowriteformat format currently being written
>> R/W callgroup call groups for call pickup
>> R/O channeltype technology used for channel
>> R/W language language for sounds played
>> R/W musicclass class (from musiconhold.conf) for hold music
>> R/W parkinglot parkinglot for parking
>> R/W rxgain set rxgain level on channel drivers that support it
>> R/O state state for channel
>> R/W tonezone zone for indications played
>> R/W txgain set txgain level on channel drivers that support it
>> R/O videonativeformat format used natively for video
>>
>>
>> On 10-06-20 11:29 PM, "Remzi Turer" <[email protected]> wrote:
>>
>>> Why don't you use phpagi to connect to Asterisk management directly, instead
>>> of doing system calls. It is more reliable, plus I have used it many of
>>> times, never had an issue or hanged process.
>>>
>>>
>>> On 10-06-20 10:44 PM, "Bruce N" <[email protected]> wrote:
>>>
>>>>
>>>> Thanks for the input.
>>>>
>>>>
>>>> I have already used system() in phpagi to do an "asterisk -rx" and the "sip
>>>> show channels" and "grep -c" for g729 and that works kind of. But as I
>>>> said,
>>>> it's not very responsive and it hangs sometimes. It probably be the same
>>>> results even if I used some php-agi parameter to harvest the info I want.
>>>> Overall, it's not as clean of a method as a dialplan method would be if it
>>>> was
>>>> doable.
>>>>
>>>>
>>>> I am amazed that there is no easy dial-plan method to tell if a trunk is
>>>> being
>>>> used or if a codec is being used.
>>>>
>>>>
>>>> P.S. GROUP_COUNT seems to be useless in my case as well.
>>>>
>>>>
>>>> Thanks
>>>>
>>>>> Date: Sun, 20 Jun 2010 20:44:53 -0400
>>>>> From: [email protected]
>>>>> To: [email protected]
>>>>> CC: [email protected]
>>>>> Subject: Re: [on-asterisk] How to check in dial-plan for a specific codec
>>>>> if
>>>>> it's being used?
>>>>>
>>>>>>> I have a need to check and see if a G.729 channel is up and running
>>>>>>> and then to set a variable as FALSE and TRUE based on the outcome.
>>>>>>> Can this be done with the dial-plan?
>>>>>>>
>>>>>>>
>>>>>>> I can also live with a dial-plan code that check to see if a Trunk
>>>>>>> is being used and if it is to set a variable to FALSE or TRUE based
>>>>>>> on the condition.
>>>>>>>
>>>>>>>
>>>>>>> I can also work with a method that can check to see if a number
>>>>>>> dialed on the system start with 678 and if a call is on progress and
>>>>>>> set a variable to TRUE or FALSE.
>>>>>>>
>>>>>>>
>>>>>>> All of the above approaches are fine by me but I prefer the Trunk
>>>>>>> option to be checked if it's used, and then the G.729 check option.
>>>>>>>
>>>>>>>
>>>>>>> Any input is appreciated.
>>>>>>>
>>>>>>>
>>>>>>> Running Asterisk v1.4.x
>>>>>>>
>>>>>>>
>>>>>>> Note: I have used phpagi to do a system call for "asterisk -rx" and
>>>>>>> that is not a good solution as the php file itself hangs sometimes
>>>>>>> in Asterisk dial-plan. Something dial-plan native would make my life
>>>>>>> much easier.
>>>>>
>>>>> Well "sip show channel" shows the codec in use for a given channel. I
>>>>> would
>>>>> have said to use an AGI script for that, but you don't want to. How about
>>>>> scanning logs, (although that could take time?)
>>>>>
>>>>> You could hack a variable into AGI command to specify the codec. There is
>>>>> a
>>>>> var called ${SIP_CODEC} that says it's used to set the codec, maybe it
>>>>> shows
>>>>> the codec too (long shot?)
>>>>>
>>>>> --
>>>>> John Van Ostrand
>>>>> CTO, co-CEO
>>>>> Net Direct Inc.
>>>>> 564 Weber St. N. Unit 12, Waterloo, ON N2L 5C6
>>>>> Ph: 866-883-1172 x5102
>>>>> Fx: 519-883-8533
>>>>>
>>>>> Linux Solutions / IBM Hardware
>>>>>
>>>>
>>>> _________________________________________________________________
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>>>
>>>
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