Comments within:
Change fxsls to fxsks for the UK
I had fxsks until today but when I was playing with the gains to try and
fix this echo issue, I found that if I dial out the Zap to one of my
pstn->sip provider's numbers, it answered the cut off in a few seconds.
If I dial that number on the pstn line itself without going through the
Zap card it works fine. Someone suggested I change fxsks to fxsls and
thas indeed did fix that problem.
If you stick with fxsks and add busydetect=no and callprogress=no you'll find those random disconnects go away. They did for me.
I find rxgain=2.0, txgain=2.0 to be the sweet spots for my UK setup.
Is that a BT line, or NTL/Telewest?
Two cards: one BT, one NTL.
Yes. The echo drove me and my parents mad. It was the same issues as you are describing. Echo at near and far end and the caller on the other end says you're quiet.
So did you have echo problems when you 1st set it up?
Through a number of mobile phone calls using T-Mobile free minutes to a phone in another room (with my little brother as a testing guinea-pig).How did you find that 2.0 was the best?
The aim is to get the monitor bars in ztmonitor to be at about half way
when talking.
I found that with calling 1471, the rx gain's showed as just below 1/2 way with some peaks above 1/2 way on some of the words and the txgain was showing as 3/4 or more whatever I changed it too - even going to things like -8.0 (I even tried -10.0 and the call was silent so that must be too far!). I found this strange though, as with 0.0 the people i'm calling complain that i'm quiet so shurly the txgain needs to go up....
Talking to 1471 is one way of testing: but you really need to have someone on the other end to both produce sound and report on echo / delay.
I'm using two X100P clone cards (actually 101P's). Supposedly these clone cards are exactly the same as a Digium X100P but I haven't ever compared them.
Please also note that the X100/1P cards are not suitable for use in the
UK. They work on the American systems where the impedance is different
to the UK.
Is that the true X100/1P you mean? - i.e does that include my MD3200 chipset clone?
(I thought you just said you had it working well in the uk? - if so,
what are you using and is the quality good enough not to notice that you
are using anything different than a normal phone plugged into the line?)
I have it working, but its not great. As I said above I am only using two clone cards. What I did find though is that the quality of calls was significantly better if the cable used to connect the X100P to the telephone point consists of a BTPlug to RJ11Socket adaptor and a cable with two RJ11 connectors on each end. Make sure that only the two central pins are used on the RJ11 connectors. On one of my cards at least this drastically reduced echo.
Out of interest, what are you using for your internal phones? Sipura ATA?You may find that asterisk reports the Zap channel as being in a strange ringing state: Add busydetect=no callprogress=no to solve this (I found that I could not get the devices to answer the line without these set: either on my BT line or NTL line.
Strange, dont seem to have had this problem - everything seems to work fine except for the annoying echo I hear and the other end complaining i'm quiet. I guess sticking them in can't harm though!
--ian
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Phil Quinney
IT Consultant - Any-Ideas
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