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Cisco 1841  Sip aware ....

Posted on 2009-07-06
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Last Modified: 2012-05-07
i have 12.4 Version advsecurity but im not sure if this router is able to handle the sip in ways that newer routers or versions can .    i heard something about nat traversal ....

im just using to for sip trunks to my PBX from the internet

if not what a better version IOS to get to or Router it self

Thanks
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Question by:ritztech
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13 Comments
 
LVL 13

Expert Comment

by:3nerds
ID: 24788757
If you plan to do voice and also need security take a look at the -VSEC  IOS path. This will give you voice and security features.

Regards,

3nerds
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Expert Comment

by:lrmoore
ID: 24791139
According to Cisco, Voice features are not supported on 1841 model
http://www.cisco.com/en/US/prod/collateral/routers/ps5853/product_data_sheet0900aecd8016a59b.html
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Expert Comment

by:3nerds
ID: 24794111
Good point lrmoore he would need to look at the 1860 series at a minimum.

Regards,

3nerds
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Author Comment

by:ritztech
ID: 24795403
basically my PBX when i switch to release 9.0 from 8.0 I get 403 Bad request so im assumming it has to do something with the IOS

i have the advsecurity 12.4 (12c)


C1841-advipservicesk9-mz would it be that one





http://tools.cisco.com/ITDIT/CFN/Dispatch

i looked a few things but didnt knwo





he only sip statement i can make is

ip nat service sip tcp 5060
                                 udp

but when i do  that no audio ....

but i also have wacky issue too on a few things like 20 secs sometimes on the first inbound call then it works until 4 min of inactivity....

really odd but other providers work so its like could it partly be this router model....



thanks
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LVL 13

Expert Comment

by:3nerds
ID: 24795480
You can't do any voice commands because the 1841 does not support them.

Regards,

3nerds
0
 
LVL 79

Expert Comment

by:lrmoore
ID: 24799731
You really need a static 1-1 NAT ip address for the PBX public - private
You can also look at the firewall inspect rules and make sure that you are not inspecting SIP traffic.
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Author Comment

by:ritztech
ID: 24841266
is that a bad thing to inspect sip

what exactly is a 1-1 nat


is it where i just do a ip nat inside source static 192.168.14.2 65.xx.xx.232

and tahts it or is it outbound too ....

thanks
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LVL 79

Expert Comment

by:lrmoore
ID: 24841690
>where i just do a ip nat inside source static 192.168.14.2 65.xx.xx.232
Correct. This handles both inbound and outbound traffic.
A "cisco" inspection of the 3rd party SIP traffic may not work. We typically have to disable SIP inspection in the firewall rules on the router when working with other party's equipment.

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Author Comment

by:ritztech
ID: 24843645
so it would be best to take these out

ip inspect name Firewall sip
ip inspect name Firewall sip-tls


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LVL 79

Expert Comment

by:lrmoore
ID: 24844115
I would, but only if you are having problems.
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Author Comment

by:ritztech
ID: 24962602
nothing happens when i do take them out .... hmm wondering if needing to switch to the T train
 
thanks
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Accepted Solution

by:
ritztech earned 0 total points
ID: 25362197
anyone have any info on sip aware IOS images if the one i have could be supported.

Thanks
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Author Comment

by:ritztech
ID: 25602069
ill have to check more thoroughly but even if  i have sip commands i dont  know if there like very limited though
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