22 Aug
2005
22 Aug
'05
8:32 p.m.
Hi Ozan, Hi Klaus,
the default IP routing of the UA may be more poor than forcing the
routing via a additional hop....I encountered couple of times such
situatations........strange, but may happen :).
Ozan, to force mediaproxy in your script, do so:
...
if (uri=~"^sip:0[0-9]*@*") {
rewritehost("195.XXX.122.XXX"); # This is PSTN Gateways's
Public IP
use_media_proxy(); # add this (bogdan)
t_on_reply("1"); # add this (bogdan)
route(1);
break;
};
...
# add this (bogdan)
onreply_route[1] {
use_media_proxy();
}
If it works (the relay), let me know if it really improved the QoS - I
will add your case to my exceptions book ;)
regards,
bogdan
Klaus Darilion wrote:
That does not help you - inserting another hop can not
compensate the
bottleneck between the UAs and the Internet (the ADSL connection).
BTW: 600km is not far away. Which Codec you you use? Try low-babdwidth
codecs like G729, ilbc, GSM and G723
klaus
Ozan Blotter wrote:
> Dear Iqbal and Bogdan,
>
> That is exactly what i need to improve QoS, because the UAs ADSL
> connection is not fast enough, 512/128k in general, OpenSER and UA's are
> located in same city but PSTN GW is nearly 600 km (350 miles nearly)
> away
> from this point. I thought since OpenSER is on a good connection (1Mbit
> Fiber) and can relay to PSTN faster then UA's themselves.
>
> Thanks,
> Ozan
>
> Also in terms of ping times how far is the PSTN gateway, as Bogdan said,
> media proxy will add even more delay, as for sending pstn via
> mediaproxy, you could do all yourprocessing, and once ser detects that
> call must goto PSTN, then do all the NAT checking ...this is a
> oversimplified view...
>
> Iqbal
>
> Bogdan-Andrei Iancu wrote:
>
>
>> Hi Ozan,
>>
>> so, if I get it right, you have a PSTN gw locate far away from the
>> UAs...and instead of letting the media traffic to do directly between
>> GW and UAs, you want to insert in the middle a RTP relay (mediaproxy)
>> in order to improve the QoS, right?
>> If so, I would say this will not help you - having a media relay on
>> your media path leads to QoS degradation due additional delays....
>>
>> If you still want to go for it....I will take a look on tour script.
>>
>> regards,
>> bogdan
>>
>> Ozan Blotter wrote:
>>
>>
>>> Dear List,
>>>
>>> At below config. i setted up OpenSER on Public IP and PSTN Gateway is
>>> again on another Public IP. I use Zyxel Prestige Series 660-HW ADSL
>>> modems on both client side and note that they have SIP ALG, also i've
>>> completed port forwarding in each modem, so SIP2SIP call happens
>>> (voice traffic goes from UA to UA) without need of anything extra as
>>> STUN or RTP RELAY. But since those are very away from each other if a
>>> UA needs to call PSTN the voice traffic flows from UA to PSTN and
>>> that lowers QoS :(
>>>
>>> I would like to activate MediaProxy again but just for one case which
>>> is PSTN, so whenever a UA needs to call PSTN the voice traffic flows
>>> like :
>>>
>>> UA (ATA) >>> OpenSER + MediaProxy >>> PSTN
>>>
>>> How can i setup this like above without touching SIP2SIP calls
>>> between UA's...
>>> or adding the lines beginning with # these to my existing config is
>>> enough ?
>>>
>>> Thanks,
>>> Ozan Blotter
>>