asterisk users - Sep 2008 - OT: Cisco 1841 - Can it be made SIP aware?

Hi,
It has IOS is 12.3(14)T7 - I'm wondering if this router can be made SIP
aware. Apparently, this current
firmware/programming is not, one way audio problems.

Is there a version that support VoIP directly for this router?

Thanks, Bart
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Barton

 

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From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Barton
Fisher
Sent: Thursday, September 18, 2008 12:21 PM
To: asterisk-user Discussion
Subject: [asterisk-users] OT: Cisco 1841 - Can it be made SIP aware?

 

Hi,

It has IOS is 12.3(14)T7 - I'm wondering if this router can be made SIP
aware. Apparently, this current

firmware/programming is not, one way audio problems.

 

Is there a version that support VoIP directly for this router?

 

Thanks, Bart

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Barton Fisher schrieb:
> It has IOS is 12.3(14)T7 - I'm wondering if this router can be made SIP
> aware. Apparently, this current
> firmware/programming is not, one way audio problems.
>  
> Is there a version that support VoIP directly for this router?
Do you have firewall feature set? Then you could simply activate the SIP
protocol inspection.
Without firewall feature set, I guess, it's impossible.


Terve,
Stefan

-- 
Last words of a stormchaser:
"Where is that rotation on the radar?!"

On Thu, Sep 18, 2008 at 12:20 PM, Barton Fisher <bart at icpage.com>
wrote:
> Hi,
> It has IOS is 12.3(14)T7 - I'm wondering if this router can be made SIP
> aware. Apparently, this current
> firmware/programming is not, one way audio problems.
>
> Is there a version that support VoIP directly for this router?
>
> Thanks, Bart
Bart,

  IMNSHO, the less SIP aware the better...

  I have to disable SIP inspection on every IOS/PIX device I come
across.  Fix the one-way audio problems on your proxy, registrar, etc
(in the case, Asterisk).

  Most SIP ALGs are broken.

-- 
Kristian Kielhofner
http://blog.krisk.org

Kristian Kielhofner schrieb:
>   IMNSHO, the less SIP aware the better...
> 
>   I have to disable SIP inspection on every IOS/PIX device I come
> across.  Fix the one-way audio problems on your proxy, registrar, etc
> (in the case, Asterisk).
> 
>   Most SIP ALGs are broken.
Interesting. I have my Asterisk with RFC-1918 IPs behid a NATting PIX
and the FIXUP SIP of the PIX makes it very easy for me to use my * as
server for external clients as well as as client for SIP providers.
The PIX nicely replaces the RFC-1918 IP in the SIP-traffic with the
current (dynamic) public IP of itself and keeps track of the RTP
traffic. Actually, it also chages the ports in the RTP negotiation and
then automatically forward the RTP traffic to the ports, the * was offering.
Very very convenient.

If the IOS firewall in the newer routers make problems, maybe I should
not change to an ISR as I planned :).


Terve,
Stefan

-- 
Last words of a stormchaser:
"Where is that rotation on the radar?!"