Voice Over IP in UK - SipGate & Echo

Author

SipGate & Echo - Need alternative?

elziko

2007-06-19, 7:11 am

I have been using SipGate or months but have suffered a terrible echo that
the other caller seems to hear. The call from my end sounds fine.

With these problems SipGate just demand that I fill out a form for every
phone call and then write back to me to tell me that their servers were
running fine at the time the calls were made.

Can anyone suggest a reason for the person calling hearing a bad echo whilst
everything sounds fine for me?

I am using an SPA-2000 with ports 560 & 16384 forwarded. As requested by
SipGate support I am not using the STUN server. I can let you know about any
other seetings that may be relevant.

Are there any alternative providers that offer no monthly fee and a free
geographical number?

TIA

Tim

2007-06-19, 7:11 am

elziko wrote:
> I have been using SipGate or months but have suffered a terrible echo that
> the other caller seems to hear. The call from my end sounds fine.

This isn't going to be SipGate's problem.

> Can anyone suggest a reason for the person calling hearing a bad echo whilst
> everything sounds fine for me?

Yes. Audio is leaking from your ear piece into your microphone.

Have you tried plugging a different phone into the SPA-2000?

Do you have the correct impedance value set on the SPA-2000? To match
the phone you using.

Have you tried turning down the microphone gain on your end?

> I am using an SPA-2000 with ports 560 & 16384 forwarded. As requested by
> SipGate support I am not using the STUN server. I can let you know about any
> other seetings that may be relevant.

Port forwarding and stun have nothing at all to do with audio quality.

Tim

elziko

2007-06-19, 1:11 pm

Thanks for the reply!

Tim wrote:
> Have you tried plugging a different phone into the SPA-2000?

Not yet, I'll find a replacement and give it a go. But in the meantime...

> Do you have the correct impedance value set on the SPA-2000? To match
> the phone you using.

Can you give me any information on where on the SPA-2000 I'd adjust this? I
assume it'll be in the 'Line 1' settings since all other seetings will
affect both 'Line 1' and 'Line 2' where the latter could have a totally
different phone on it. Also how would I go about choosing a value for this?

> Have you tried turning down the microphone gain on your end?

If you mean the gain on my actual telephone - I don;t believe I can set
this. If there is an additional gain built into the ATA then, as above, can
you tell me where I'd find it? I'd expect it to be under 'Line 1' again but
don;t seem to be able to see anything that looks relevant.

TIA

Graham

2007-06-19, 1:11 pm

"elziko" <elziko@yahoo.co.uk> wrote in message
news:uZOdi.7917$p8.5777@text.news.blueyonder.co.uk...
>I have been using SipGate or months but have suffered a terrible echo that
>the other caller seems to hear. The call from my end sounds fine.
>
> With these problems SipGate just demand that I fill out a form for every
> phone call and then write back to me to tell me that their servers were
> running fine at the time the calls were made.
>
> Can anyone suggest a reason for the person calling hearing a bad echo
> whilst everything sounds fine for me?
>
> I am using an SPA-2000 with ports 560 & 16384 forwarded. As requested by
> SipGate support I am not using the STUN server. I can let you know about
> any other seetings that may be relevant.
>
> Are there any alternative providers that offer no monthly fee and a free
> geographical number?
>
> TIA

You don't tell us what you have got plugged into the phone-port of
the ATA. Is it DECT or a standard wired phone. Do you use it
as a hands free speakerphone?

--
Graham.
%Profound_observation%

elziko

2007-06-19, 1:11 pm

Graham wrote:
> You don't tell us what you have got plugged into the phone-port of
> the ATA. Is it DECT or a standard wired phone. Do you use it
> as a hands free speakerphone?

Sorry, it is a DECT phone but i do not use it as a speaker phone.

Graham

2007-06-19, 1:11 pm

"elziko" <elziko@yahoo.co.uk> wrote in message
news:OVQdi.7956$p8.2791@text.news.blueyonder.co.uk...
> Thanks for the reply!
>
> Tim wrote:
>
> Not yet, I'll find a replacement and give it a go. But in the meantime...
>
>
> Can you give me any information on where on the SPA-2000 I'd adjust this?
> I assume it'll be in the 'Line 1' settings since all other seetings will
> affect both 'Line 1' and 'Line 2' where the latter could have a totally
> different phone on it. Also how would I go about choosing a value for
> this?
>
>
> If you mean the gain on my actual telephone - I don;t believe I can set
> this. If there is an additional gain built into the ATA then, as above,
> can you tell me where I'd find it? I'd expect it to be under 'Line 1'
> again but don;t seem to be able to see anything that looks relevant.
>
> TIA

My device is a Linksys PAP-2 so it might be a bit different.
Look in the Regional tab under miscellaneous
FSX Port impedence = 370+620||310nF

Play around with the FSX input and output gain
mine are both set to -3 (minus 3)

In the Line 1 and Line 2 tabs, audio configuration make
sure all the options related to echo are on (there are three on the PAP2)

Apologies if any of this is not relevant to your device.

--
Graham.
%Profound_observation%

elziko

2007-06-19, 1:11 pm

Graham wrote:
> My device is a Linksys PAP-2 so it might be a bit different.
> Look in the Regional tab under miscellaneous

Thanks i found them - the settings are the same as yours but i will have a
play to see if I can improve things.

{{{{{Welcome}}}}}

2007-06-19, 1:11 pm

elziko wrote:
> Graham wrote:
>
> Thanks i found them - the settings are the same as yours but i will
> have a play to see if I can improve things.

The FXS Port Impedance needs to be set to: 370+620||310nF if using
phones designed for use in the UK

As mentioned above drop the drop the gain slightly and check the various
echo reduction options, you'll have to go into admin and advanced mode
to see some of these.

Other settings you may find and may want to check just to get a UK feel
to the device if not already done so (these are bassed on a PAP2, so may
be slight difference on which are listed):

Under Regional Tab.

Dial Tone: 350@-19,440@-22;60(*/0/1+2)
Second Dial Tone: 420@-19,520@-19;10(*/0/1+2)
Outside Dial Tone: 420@-16;10(*/0/1)
Prompt Tone: 520@-19,620@-19;10(*/0/1+2)
Busy Tone: 400@-10;30(.375/.375/1)
Reorder Tone: 400@-20;20(*/0/1)
Off Hook Warning Tone: 480@-10,620@0;10(.125/.125/1+2)
Ring Back Tone: 400@-20,450@-20;*(.4/.2/1+2,.4/2/1+2)
Confirm Tone: 600@-16;1(.25/.25/1)
SIT1 Tone:
950@-16,1400@-16,1800@-16;20(.330/0/1,.330/0/2,.330/0/3,0/1/0)
SIT2 Tone:
914@-16,1371@-16,1777@-16;20(.274/0/1,.274/0/2,.380/0/3,0/4/0)
SIT3 Tone:
914@-16,1371@-16,1777@-16;20(.380/0/1,.380/0/2,.380/0/3,0/4/0)
SIT4 Tone:
985@-16,1371@-16,1777@-16;20(.380/0/1,.274/0/2,.380/0/3,0/4/0)
MWI Dial Tone: 350@-19,440@-22;10(.75/.75/1+2)
Cfwd Dial Tone: 350@-19,440@-19;2(.2/.2/1+2);10(*/0/1+2)
DND Dial Tone: 350@-19,440@-19;2(.2/.2/2);10(*/0/1+2)
Holding Tone: 600@-19;*(.1/.1/1,.1/.1/1,.1/9.5/1)
Conference Tone: 350@-19;20(.1/.1/1,.1/9.7/1)
Secure Call Indication Tone: 397@-19,507@-19;15(0/2/0,.2/.1/1,.1/2.1/2)
Feature Invocation Tone: 350@-16;*(.1/.1/1)

Ring1 Cadence: 60(.4/.2,.4/2)
Ring2 Cadence: 60(1/2)
Ring3 Cadence: 60(.25/.25,.25/.25,.25/1.75)

....

CWT1 Cadence: 30(.2/.2,.2/4.4)

Ring Waveform: Sinusoid (though Trapezoid may help problematic phones to
ring).
Ring Frequency: 25
Ring Voltage: 80 (You can use 70, if problems try 75, 80, 85, 90)
CWT Frequency: 425@-20
Synchronized Ring: Yes

Hook Flash Timer Min: .06
Hook Flash Timer Max: .2
Callee On Hook Delay: 0
Reorder Delay: 5
Call Back Expires: 1800
Call Back Retry Intvl: 30
Call Back Delay: .5
VMWI Refresh Intvl: 0
Interdigit Long Timer: 10
Interdigit Short Timer: 3
CPC Delay: .5
CPC Duration: .1

....

Time Zone: GMT
FXS Port Impedance: 370+620||310nF
Daylight Saving Time Rule:
start=3/-1/7/2:0:0;end=10/-1/7/2:0:0;save=1:0:0
DTMF Playback Level: -16
DTMF Playback Length: .25
Caller ID Method: ETSI FSK With PR(UK)
FXS Port Power Limit: 3
Caller ID FSK Standard: v.23
Feature Invocation Method: Default
More Echo Suppression: yes

In Line 1 (or Line 2)

Line Enable: yes
NAT Mapping Enable: yes
NAT Keep Alive Enable: yes
Network Jitter Level: low (Depends on how good your broadband is / route
to VoIP server)
Jitter Buffer Adjustment: Up and Down

Proxy and Registration
Proxy: Your Voip Proxy address (for example sip1.sipdiscount.com or
sip.voipcheap.com or sipgate.co.uk etc)

Subscriber Information - (where you enter your VoIP Account details).

Supplementary Service Subscription - This is where you enable services
such as Call Waiting, 3-Way Calling, block anonymous caller etc)

Audio Configuration - This is where you set-up which codecs you want to
use or only use.
If you have limited broadband speed (mostly if upload is poor) then you
probably only use one or more from G729a, G723 or G726)
If you want the best quality line, then you'd choose G711a (which is the
standard used on a standard line)

(Myself, I use G711a only, have that set to my preferred codec and use
that one only, but you may find other codecs are fine).

DTMF Tx Method: (This will depend on the VoIP service you use, trial and
error and depends on codec) Soon know if it don't work when
try telephone banking for example and it
doesn't recognise what numbers you are pressing).

Hook Flash Tx Method: None