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uk.telecom.voip (UK VOIP) (uk.telecom.voip) Discussion of topics relevant to packet based voice technologies including Voice over IP (VoIP), Fax over IP (FoIP), Voice over Frame Relay (VoFR), Voice over Broadband (VoB) and Voice on the Net (VoN) as well as service providers, hardware and software for use with these technologies. Advertising is not allowed.

Sound/call quality tweaks (on an SPA3102)...



 
 
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  #1  
Old March 25th 08, 09:06 PM posted to uk.telecom.voip
Jose
external usenet poster
 
Posts: 96
Default Sound/call quality tweaks (on an SPA3102)...

Hi All,

I've just started using my SPA3102, and wasn't impressed with both the
sound quality of an incoming PSTN call - I don't know if the person on
the other side was using a poor cordless phone (?) - and an outgoing
call to a mobile in a diferent country - not the easiest scnearios, I
know...

Still, I've changed "Jitter buffer adjustment" from "up and down" to
"up only" - trying to increase the buffer so the sound doesn't have
cuts in the middle, like I noticed today :-(
Does this seem like a reasonable option?

Besides, I'm considering fidling with codecs... Apparently G726 should
allow for fair quality, with smaller packets of data. Right, or not so
much?? I'm trying G726-32

Any other codec sugestions, and why you'd choose them? (I'm presently
using G711a)

Oh, since the SPA3102 is attached to a router port, I've already setup
in the router high priority to that port over the others - wich have
normal priority.

Regards,
Jose
  #2  
Old March 26th 08, 06:21 PM posted to uk.telecom.voip
PeterW
external usenet poster
 
Posts: 18
Default Sound/call quality tweaks (on an SPA3102)...

(Jose) wrote in
:

Hi All,

I've just started using my SPA3102, and wasn't impressed with both the
sound quality of an incoming PSTN call - I don't know if the person on
the other side was using a poor cordless phone (?) - and an outgoing
call to a mobile in a diferent country - not the easiest scnearios, I
know...

Still, I've changed "Jitter buffer adjustment" from "up and down" to
"up only" - trying to increase the buffer so the sound doesn't have
cuts in the middle, like I noticed today :-(
Does this seem like a reasonable option?

Besides, I'm considering fidling with codecs... Apparently G726 should
allow for fair quality, with smaller packets of data. Right, or not so
much?? I'm trying G726-32

Any other codec sugestions, and why you'd choose them? (I'm presently
using G711a)

Oh, since the SPA3102 is attached to a router port, I've already setup
in the router high priority to that port over the others - wich have
normal priority.

Regards,
Jose


If you have ADSL/Cable, then G711a is OK unless you have multiple calls.
Bandwidth is ~85k each way with overheads - quality is the best you'll get
and equicalent to ISDN.

G726-32 is DECT quality in half the bandwidth of G711a.

G711u is comparable to G711a but the North American standard.

Anything other codec you will probably notice the compression to some
degree.

Regards
Peter
  #3  
Old March 26th 08, 09:58 PM posted to uk.telecom.voip
Jose
external usenet poster
 
Posts: 96
Default Sound/call quality tweaks (on an SPA3102)...

On Wed, 26 Mar 2008 18:21:49 +0000 (UTC), PeterW
wrote:


G726-32 is DECT quality in half the bandwidth of G711a.


One detail I could not find information about: does G726 use the same
10ms frames as G711?

I've noticed the diference in sound fidelity, already, after switching
from G711u to G726-32, but the sound continuity is fautless, and
fidelity is very much acceptable!

I understand not all Voip providers are equal when it comes to call
sound quality, and I notice that particularly when calling mobiles
"abroad", and even landlines in "far" destinations like Japan, sound
continuity, in particular, is very easily discernable in such cases,
between my 2 Voip providers: VoipCheap and VoipFone ;-P

I'm in Portugal, I could go into detail, but summing up, I've given up
calling mobiles in the UK using VoipCheap ;-)


Anything other codec you will probably notice the compression to some
degree.


I'm willing to lose fidelity, for the sake of continuity and
synchronism, although other than Voip calls to landlines in Japan
through Voipcheap, I only have complaints about some calls to mobiles
- but there, the mobile network probably plays probably the most
important role :-S


Best,
Jose
  #4  
Old March 27th 08, 04:56 PM posted to uk.telecom.voip
Pet - www.GymRatZ.co.uk
external usenet poster
 
Posts: 58
Default Sound/call quality tweaks (on an SPA3102)...

Jose wrote:

I'm in Portugal, I could go into detail, but summing up, I've given up
calling mobiles in the UK using VoipCheap ;-)


Have you found a cheaper way Jose ?
Go-on, tell more...

--
http://gymratz.co.uk - Fitness & Gym Equipment/nutrition specialists.
http://www.trade-price-supplements.co.uk - Bulk buy for up to 33% off.
http://www.BBE-Boxing-Equipment.co.uk - New Boxing Equipment site.
http://www.commercial-gym-equipment.co.uk - Commercial Gym Equipment.
  #5  
Old March 28th 08, 12:41 AM posted to uk.telecom.voip
Jose
external usenet poster
 
Posts: 96
Default Sound/call quality tweaks (on an SPA3102)...

On Thu, 27 Mar 2008 16:56:49 +0000, "Pet - www.GymRatZ.co.uk"
wrote:

I'm in Portugal, I could go into detail, but summing up, I've given up
calling mobiles in the UK using VoipCheap ;-)


Have you found a cheaper way Jose ?
Go-on, tell more...


Actually, yes: http://www.smslisto.com/en/ 5 Euro cents a minute :-D
I haven't tried it (yet) though.

Usefull info: http://backsla.sh/betamax

Regards,
Jose

  #6  
Old March 28th 08, 05:46 PM posted to uk.telecom.voip
Pet - www.GymRatZ.co.uk
external usenet poster
 
Posts: 58
Default Sound/call quality tweaks (on an SPA3102)...

Jose wrote:

Actually, yes: http://www.smslisto.com/en/ 5 Euro cents a minute :-D
I haven't tried it (yet) though.


Nice one Jose.
I have just set up an account and cancelled my auto-top-up on
voipcheap.com Still got a months worth of credit to use, but will
switch once credit has gone.

:¬)

Cheers
Pete
--
http://gymratz.co.uk - Fitness & Gym Equipment/nutrition specialists.
http://www.trade-price-supplements.co.uk - Bulk buy for up to 33% off.
http://www.BBE-Boxing-Equipment.co.uk - New Boxing Equipment site.
http://www.commercial-gym-equipment.co.uk - Commercial Gym Equipment.
  #7  
Old March 31st 08, 03:15 PM posted to uk.telecom.voip
PeterW
external usenet poster
 
Posts: 18
Default Sound/call quality tweaks (on an SPA3102)...

"Pet - www.GymRatZ.co.uk" wrote in
:

Jose wrote:

Actually, yes: http://www.smslisto.com/en/ 5 Euro cents a minute :-D
I haven't tried it (yet) though.


Nice one Jose.
I have just set up an account and cancelled my auto-top-up on
voipcheap.com Still got a months worth of credit to use, but will
switch once credit has gone.

:¬)

Cheers
Pete


SMSListo are another of the Betamax clones (like VoipCheap) so I guess the
technical quality etc. will be basically the same.

Peter
  #8  
Old March 31st 08, 04:19 PM posted to uk.telecom.voip
Pet - www.GymRatZ.co.uk
external usenet poster
 
Posts: 58
Default Sound/call quality tweaks (on an SPA3102)...

PeterW wrote:

SMSListo are another of the Betamax clones (like VoipCheap) so I guess the
technical quality etc. will be basically the same.


Should be.
I wonder if their business model revolves around hooking people up with
cheap good prices then after a certain period of time sliding the prices
up whereby the majority of people won't bother to shop around, then
they start up a whole new business with attractive rates, perhaps
keeping below a certain tax threshold?

Don't see why anyone should want to be anti Betamax companies, I've had
brilliant service from them and unbeatable call savings to mobiles.

--
http://gymratz.co.uk - Fitness & Gym Equipment/nutrition specialists.
http://www.trade-price-supplements.co.uk - Bulk buy for up to 33% off.
http://www.BBE-Boxing-Equipment.co.uk - New Boxing Equipment site.
http://www.commercial-gym-equipment.co.uk - Commercial Gym Equipment.
  #9  
Old April 1st 08, 05:38 PM posted to uk.telecom.voip
Jose
external usenet poster
 
Posts: 96
Default Sound/call quality tweaks (on an SPA3102)...

On Mon, 31 Mar 2008 16:19:03 +0100, "Pet - www.GymRatZ.co.uk"
wrote:

SMSListo are another of the Betamax clones (like VoipCheap) so I guess the
technical quality etc. will be basically the same.


Right... Although were a certain of their servers is, and you are,
meaning, how far apart, might make a diference, among their offerings
- making pings to diferent of their servers does return diferent
values.


Don't see why anyone should want to be anti Betamax companies, I've had
brilliant service from them and unbeatable call savings to mobiles.


1) I suppose what you understand by "service" - I certainly never had
any of my e-mails replied when I first sarted using one of their
brands, and never heard of anyone who has;
And if you want a little more service than just cheap calls, you
definitelly need to look somewhere.

2) Cheap they are indeed, but when it comes to less "common", or more
"distant" destinations - such as Japan - I'm not happy with their
calls, while other Voip provider I use - VoipFone - deliver perfect
call quality (even to Japan that is)!

How they can sell so cheap, offer so much of free calls, and if they
do it legally and fairly, I really don't have a clue.

There's room for Betamax, and for a lot more sophisticated (and less
cheap) offers, I guess.

Regards,
Jose


  #10  
Old April 1st 08, 06:20 PM posted to uk.telecom.voip
PeterW
external usenet poster
 
Posts: 18
Default Sound/call quality tweaks (on an SPA3102)...

(Jose) wrote in
:

On Mon, 31 Mar 2008 16:19:03 +0100, "Pet - www.GymRatZ.co.uk"
wrote:

SMSListo are another of the Betamax clones (like VoipCheap) so I
guess the technical quality etc. will be basically the same.


Right... Although were a certain of their servers is, and you are,
meaning, how far apart, might make a diference, among their offerings
- making pings to diferent of their servers does return diferent
values.


Don't see why anyone should want to be anti Betamax companies, I've
had brilliant service from them and unbeatable call savings to
mobiles.


1) I suppose what you understand by "service" - I certainly never had
any of my e-mails replied when I first sarted using one of their
brands, and never heard of anyone who has;
And if you want a little more service than just cheap calls, you
definitelly need to look somewhere.

2) Cheap they are indeed, but when it comes to less "common", or more
"distant" destinations - such as Japan - I'm not happy with their
calls, while other Voip provider I use - VoipFone - deliver perfect
call quality (even to Japan that is)!

How they can sell so cheap, offer so much of free calls, and if they
do it legally and fairly, I really don't have a clue.

There's room for Betamax, and for a lot more sophisticated (and less
cheap) offers, I guess.

Regards,
Jose




The VoipCheap & SMSListo SIP servers are identical - they have load-
balancing on their DNS hance the different order. Betamax offer a generally
good service at a great price.

sip.voipcheap.com

Server: UnKnown
Address: 192.168.1.250

Non-authoritative answer:
sip.voipcheap.com internet address = 194.221.62.198
sip.voipcheap.com internet address = 194.120.0.198

voipcheap.com nameserver = ns2.betamax.com
voipcheap.com nameserver = ns3.betamax.com
voipcheap.com nameserver = ns1.betamax.com
ns2.betamax.com internet address = 194.120.0.222
ns3.betamax.com internet address = 194.221.62.222
ns1.betamax.com internet address = 80.239.235.221
sip.smslisto.com

Server: UnKnown
Address: 192.168.1.250

Non-authoritative answer:
sip.smslisto.com internet address = 194.120.0.198
sip.smslisto.com internet address = 194.221.62.198

smslisto.com nameserver = ns1.betamax.com
smslisto.com nameserver = ns3.betamax.com
smslisto.com nameserver = ns2.betamax.com
ns3.betamax.com internet address = 194.221.62.222
ns1.betamax.com internet address = 80.239.235.221
ns2.betamax.com internet address = 194.120.0.222
 




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