Verizon Wireless LTE/4G and SIP Header Manipulation

Tue Sep 22 19:51:02 UTC 2015

On Tue, Sep 22, 2015 at 12:22 PM, Christopher Morrow
<morrowc.lists at gmail.com> wrote:
> On Tue, Sep 22, 2015 at 12:03 PM, Mark Stevens <manager at monmouth.com> wrote:
>> Hi All,
>>
>> Has anyone seen that something (most likely an alg) on Verizon's LTE/4G
>> network is rewriting SIP headers,in particular From Tag identifiers? We
>> cannot make a SIP call from our cellphones (using cellular data) beyond 30
>> seconds because the TAGs are rewritten and the destination Asterisk server
>> drops the call because of this.
>>
>
> I'm shocked that the cellular carrier is making over-the-top phone
> calls non-functional. I'm sure they'll agree to meet you at their CO
> so you can do the proper work request sometime between 6am and 7pm in
> 2 weeks time.
>

joking aside, are you sure the packets get mangledin VZW and not
elsewhere along the path? how would you be able to prove it?

> go incombancy!
>
>> Thanks
>>
>> Mark