22 Aug
2005
22 Aug
'05
8:37 p.m.
Dear Klaus,
As i get ideas from three people here i should close this subject. Codec i
use is g729 (it supports g711 too) as it comes default with Zyxel Prestige
2002, even i have a special firmware (engineered one) for this product so it
supports g723 too :P, i think problem is high latencies in ADSL or CableNet
services here, even they're 512/128, 1024/256, 2048/512 in ADSL and 512/256,
1024/512, 2048/1024 in CableNet...
Anyway i will try to find another solution and thanks for your replies...
Ozan...
------------------------------
Message: 3
Date: Sat, 20 Aug 2005 23:03:59 +0200
From: Klaus Darilion <klaus.mailinglists(a)pernau.at>
Subject: Re: [Users] Re: Re: MediaProxy & PSTN GW
To: cosmocid(a)ispro.net.tr
Cc: users(a)openser.org
Message-ID: <43079ABF.9030405(a)pernau.at>
Content-Type: text/plain; charset=us-ascii; format=flowed
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