[Asterisk-Users] Static on outgoing calls (Quad E1)

[Ben Merrills]

I placed a call as follows:

SIP (Cisco Phone) -> Asterisk PRI (outgoing) -> Asterisk PRI (incoming)
-> Sip (Cisco)

The call exhibited the same problems as before, static crackle on the
line. (Dialled party)

I still think this is an issue with the Digium card, but I'm unsure as
to what. 

I've been playing with the rxgain and txgain, although I think this just
has the effect of making the call so quiet that there's little noise to
hear.

Hope this provides some help... confused :(

Ben

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Andres
Sent: 11 August 2004 18:53
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] Static on outgoing calls (Quad E1)

Ben Merrills wrote:

>If I call a number from my mobile say, it sounds fine! Nothing is wrong
>with the call quality at all. If I call asterisk (via the digium card)
>then route that call out to another mobile, that sounds just as bad as
>making the call from asterisk...
>
>So, to cap off,
>
>OK: Mobile -> EuroISDN -> Asterisk (TE410P E1) -> Anything
>BAD: SIP (Cisco) -> Asterisk (TE410P E1) -> Anything (Mobile, landline
>etc)
>Bad: Mobile -> Asterisk (TE410P E1) ReDialed -> Anything (Mobile,
>landline etc)
>
>  
>
Can you try a SIP - Asterisk -PSTN - SIP call?

What I want to know is if you dial out of your Cisco SIP Phone via the 
PRI and force that call to loop back immediately (by dialing one of your

DIDs) to your Asterisk an then get answered by another SIP Phone, does 
the call sound bad?  I think the idea here is to isolate wether the bad 
sound is due to your hardware and immediate PSTN switch or some farther 
away PSTN switch.

Calls that go out of your Asterisk get routed one way in the PSTN jungle

and calls coming to you probably get routed another way.  Thats is one 
way to explain why there is bad audio on outgoing calls and good on 
incoming.

>It's rather confusing...
>
>Any help with this would of course be greatly appreciated. I called
>Digium last week, and they didn't seem to know what to do. Except
>replace the card, which I'm sure isn't what needs doing. It really does
>seem like it's some obscure problem with the configuration... gah! :/
>
>Cheers,
>
>Ben
>
>-----Original Message-----
>From: asterisk-users-admin at lists.digium.com
>[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Andres
>Sent: 11 August 2004 17:19
>To: asterisk-users at lists.digium.com
>Subject: Re: [Asterisk-Users] Static on outgoing calls (Quad E1)
>
>Ben Merrills wrote:
>
>  
>
>>We're using a TE410P connected directly to Kingston Telecom (C7 ->
>>EuroISDN conversion is done along the route to us).
>>
>>Unsure what to change within my setup really. I've played around with
>>the rxgain and txgain, although it's made some difference, nothing
>>special!
>>
>>Does anyone know why I would get static on outgoing calls via the
>>    
>>
>TE410P
>  
>
>>and not incoming?
>>
>>
>> 
>>
>>    
>>
>What happens when you call one of your numbers..ie have the call go out

>the PRI and then come back into your Asterisk.  Does it also sound bad?
>
>
>  
>


-- 
Andres
Network Admin
http://www.telesip.net


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