[mystere]

I have an SPA-3102 and i'm having a difficult time getting the settings right for the PSTN connection. I have this connected via an Asterisk PBX.

Symptoms:

It will ring, but the PBX will intermittently think the call has stopped, then pick up ringing again as if it were a different call.

Once answered, the call stays connected, but neither party can hear each other.

This kind of worked at one time, but when fooling around with the settings it's gotten a lot worse. Part of the problem is that I can't find any specifications for what the costa rica telephone system requires.

Here are my PSTN international settings

FXO Port Impedance - 600
Tip/Ring Voltage Adjust - 3.5V
Operational Loop Current Min 0 10 mA
Current Limiting Enable - no
Line In-Use Voltage - 30
Ring Freq/Max - 10/100
Ring Validation time 256ms
Ring Indication Delay: 512ms
Ring timeout: 640ms
Rnig Threshold - 13.5 - 16.5Vrms
Ringer Impedance: high

Anyone have any suggestions?

[mystere]

I got it working again, it was something unrelated... but I still need to figure out what the right settings should be. Anyone know what the hangup tone is for CR

[tommycr]

after a long time testing, I found the best configuration for SIP 3102 PSTN tab in CR is:

disconnect tone: 425@-30,421@-30;4(.33/.33/1+2)
DTMF: rfc2383, using AVT band, strict mode
Impedance depends on how long are you from "ICE", 600 ohms seems to work fine, anyway try with 900 ohms

I am using 3102 as the PSTN port for my trixbox and works fine so far,


Good luck,

Juan ( Also from CR )

[mystere]

Thanks for the information. The problem is, you can't contact ICE about this stuff because you're not supposed to be doing VoIP

[tommycr]

Don´t worry, Almost 80% of the important enterprises in Costa Rica are doing VoIP.

By the way, have you play with the other values of PSTN Disconnect Detection section ?

Sometimes I have problems with early disconnection....

Thanks,

[jorcone]

This is excactly what I was looking for. You just solved a problem that I had for weeks.

PURA VIDA !!!!!