[Asterisk-video] Is it possible to pass through two asterisk ?

[Klaus Darilion]

오상수 schrieb:
> Thanks your advice  :-) 
> 
>  
> 
> I had already tested below two case senerio  
> 
>  
> 
> SIP<-->asterisk<--->SIP (voice, video)
> 
>  
> 
> SIP audio<-->asterisk<-->DAHDI-E1<-->asterisk<-->SIP audio
> 
> But  I didn't test case which was related by 3G mobile phone
> 
>  
> 
> What dose it need ?

If you have a 3G mobile where you can make video calls thiw will help
you debugging a lot.

1. Make a video call from the mobile to your Asterisk server. Enable pri
debugging in Asterisk and take a look at the incoming ISDN SETUP
message. It should have
 "H.223 and H.245"
User Information Layer 1 (UL1)

Further notice if UL1 is set only in the Bearer Capability (BC)
Information Element (IE) or if a Low Layer Compatibility (LLC) IE is
also present. Because usually have to make the same settings for
outgoing calls.

Then, install Asterisk the AMR codec, libh324m and app_h324m.


If you want to make outgoing video calls to mobile phones, you need to
patch Asterisk to signal h324m on outgoing calls using:
https://issues.asterisk.org/view.php?id=13055 and
https://issues.asterisk.org/view.php?id=10217

If the receiver of the video calls is always the other Asterisk server,
you do not need to patch Asterisk as you can for example differ voice
from video calls using different extensions.

regards
klaus

> 
> --> devices or setting
> 
>  
> 
> Dose Telco's help need ? 
> 
>  
> 
> Regards
> Sangsu
> 
>  
> 
> -----Original Message-----
> *From:* "Klaus Darilion"<klaus.mailinglists at pernau.at>
> *To:* "Development discussion of video media support in 
> Asterisk"<asterisk-video at lists.digium.com>
> *Cc:*
> *Sent:* 09-07-02(목) 20:06:23
> *Subject:* Re: [Asterisk-video] Is it possible to pass through two 
> asterisk ?
> 
> sorry, sent too early :-)
> 
> 오상수 schrieb:
>  > Hello all
>  >
>  > I would like to study asterisk video call
>  > But I'm beginner in asterisk
>  >
>  > Is it possible to pass through two asterisk ?
>  >
>  > Sip Phone--> [asterisk1] --Zap ----- E1 ------ Zap --[asterisk2] --> Sip
>  > Phone
>  >
>  > Between Asterisk1 and Asterisk2 is connected by E1(PRI)
>  > For Video Call, libh324m & amr codec is installed
>  >
>  > If it is possible, how to configure extension.conf
> 
> 
> Yes it is possible. But I suggest that you start from the beginning, e.g:
> 
> SIP<-->asterisk<--->SIP
> 
> 3G mobile phone <-->asterisk<--->h324m_loopback()
> 
> 3G mobile phone <-->asterisk<--->h324m_gw<-->echo()
> 
> 3G mobile phone <-->asterisk<--->SIP
> 
> SIP <-->asterisk<--->3G mobile phone
> 
> SIP audio<-->asterisk<-->DAHDI-E1<-->asterisk<-->SIP audio
> 
> only if you manage all of the above scenarios to work successful, then
> try video from Asterisk to Asterisk.
> 
> I think you will experience high delay.
> 
> Start with Asterisk 1.4. on 32bit Linux as it is more tested as 1.6 and
> 64bit.
> 
> regards
> klaus
> 
> 
> 
> 
>  >
>  > Best regards
>  >
>  >
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