[AusNOG] Fixed wireless fun and games with SIP

[Brendan Ord]

The phones usually won't be getting their inbound traffic on 5060.  They might, but not usually.

If the SIP registrar sits out on the internet, the phones will communicate to that on port 5060 but the return traffic will come back on a random high port.  Just bog standard PAT behavious.


Brendan Ord
Voice Engineer

0434 364 432
07 3467 9070
rivernet.net.au

Rivernet Communications Pty Ltd
Suite GE2, Lower East Wing, BTP Conference Centre
1 Clunies Ross Court, Eight Mile Plains. QLD 4113


-----Original Message-----
From: AusNOG <ausnog-bounces at lists.ausnog.net> On Behalf Of Patrick Cole
Sent: Friday, 1 March 2019 1:20 PM
To: Greg McLennan <mclennan at internode.on.net>
Cc: ausnog at ausnog.net <ausnog at lists.ausnog.net>; Narelle Clark <narellec at gmail.com>
Subject: Re: [AusNOG] Fixed wireless fun and games with SIP

I think Greg might be on to something there - If the handsets by chance are doing something like UPNP to request forward of 5060 through from the router, only one might be getting the inbound calls due to that as they would be competing for the port forward.

PC

Fri, Mar 01, 2019 at 02:14:56PM +1100, Greg McLennan wrote:


>    If your sharing(sip?) are you both registering on ports 5060, or
>    reconfigured one user to 5061?. Does the front end router have a sip
>    helper option?
> 
>    Cheers Greg
> 
>    On 1/03/2019 1:14 pm, Narelle Clark wrote:
> 
>      Hi all
>      Wondering if anyone has seen this before: customer has home office, SIP
>      phone on dsl and all works fine.
>      Relocates to another home connected via NBN fixed wireless and shares
>      with another user but wrong handset rings and can't take inbound calls.
>      No apparent issues with video downloads. Makes outbound calls fine.
>      Looks like NAT getting its ports crossed?
>      Ideas anyone?
>      Cheers 
>      Narelle
> 
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--
Patrick Cole <patrickc at spirit.com.au>
Senior Network Engineer
Spirit Telecom Ltd
19-25 Raglan St, South Melbourne VIC 3205
Desk:    0385541391
Mobile:  0410626630
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