[Asterisk-Dev] MGCP and ChanIsAvail problem

[James Golovich]

I originally wrote ChanIsAvail to be for Zap devices, and then with some
ideas from Mark I made it generic enough to work for any channel driver.
Unfortunately for the voip protocols it doesn't really work very well.
It basically grabs starts a call but never actually makes a call, and I
don't know how the different channel drivers will handle it.

I don't really see anything that points to ChanIsAvail to being the
problem, it looks more like the Wait is whats causing the problem.  or
maybe a combination of using ChanIsAvail and the Wait

James

On Tue, 1 Apr 2003, Pavel Litvinenko wrote:

> With sip and h323 * works fine  ... but when I use MGCP endpoints :
> 
> with this config:
> 
> exten => 1001,1,ChanIsAvail(MGCP/aaln/1 at MGCP)
> exten => 1001,2,Ringing()
> #exten => 1001,3,Wait(1)
> exten => 1001,3,Dial,MGCP/aaln/1 at MGCP
> exten => 1001,102,Busy()
> 
> when I dial 1001 , the phone (Dlink DPH-100m)  just ringing one time and 
> connection is lost ...
> 
>     -- Executing ChanIsAvail("H323/ip$192.168.161.248:33283/3917", 
> "MGCP/aaln/1 at MGCP") in new stack
>     -- Executing Ringing("H323/ip$192.168.161.248:33283/3917", "") in 
> new stack
>     -- Executing Dial("H323/ip$192.168.161.248:33283/3917", 
> "MGCP/aaln/1 at MGCP") in new stack
>     -- Called aaln/1 at MGCP
>     -- MGCP/aaln/1 at MGCP is ringing
>   == No one is available to answer at this time
> 
> everything is ok when
> 
> exten => 1001,1,ChanIsAvail(MGCP/aaln/1 at MGCP)
> exten => 1001,2,Ringing()
> exten => 1001,3,Wait(1)
> exten => 1001,4,Dial,MGCP/aaln/1 at MGCP
> exten => 1001,102,Busy()
> 
>   -- Executing ChanIsAvail("H323/ip$192.168.161.248:33284/3918", 
> "MGCP/aaln/1 at MGCP") in new stack
>     -- Executing Ringing("H323/ip$192.168.161.248:33284/3918", "") in 
> new stack
>     -- Executing Wait("H323/ip$192.168.161.248:33284/3918", "1") in new 
> stack
>     -- Executing Dial("H323/ip$192.168.161.248:33284/3918", 
> "MGCP/aaln/1 at MGCP") in new stack
>     -- Called aaln/1 at MGCP
>     -- MGCP/aaln/1 at MGCP is ringing
>     -- MGCP/aaln/1 at MGCP answered H323/ip$192.168.161.248:33284/3918
>   == Spawn extension (default, 1001, 4) exited non-zero on 
> 'H323/ip$192.168.161.248:33284/3918'
> 
> 
> 
> 
> -- 
> ----
> ---------
> Best Regards,
>      Pavel Litvinenko.
>      ICQ: 16224754
>      Ph: (8632) 923540, 923640
>      sip:litw at iptel.org
> 
> 
> 
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