> > The x100p (and presumably the clones) have an integrated circuit on > > the board that was manufactured for use in the US with 600 ohm pstn > > lines. The chip cannot be changed to any other impedance. However, > > there can be many different sources for the echo and impedance > > matching is only one of them. Others include: > > - incorrect * zapata.conf parameters > > - poorly engineered motherboards (eg, poor PCI bus, interrupt > > latency) > > > > [snip] > > There are two types of alternative cards (not starting a discussion on who > made it first!), one called AMI-IA92 (Si3021/Si3012/MD3200) with a FCC > approval and one called AMI-IE92 (Si3021/Si3014/MD3200) with a R&TTE > approval. > > The AMI-IE92 have additional components on board for setting AC real/complex > termination as well as DC termination (Japan Mode/FCC Mode/CTR21 Mode). > > Both card types are compatible but the wcfxo driver does not utilise the > additional settings on the AMI-IE92 card. > > Source: > Chipsets (login required) > https://www.mysilabs.com/public/documents/tpub_doc/dsheet/Wireline/Silicon_DAA/en/si3034.pdf
> https://www.mysilabs.com/public/documents/tpub_doc/dsheet/Wireline/Silicon_DAA/en/si3035.pdf > > Amigo Communications product sheet (www.amigocom.com) > http://61.31.72.100/amigocom/products/ami_ia92_ie92.htm > For those that would like to play around with the above, might take a look at zaptel/fxstest.c (and the associated Makefile complile options) as it can be used to modify/view the tdm04b chip parameters. I'm not a programmer, but doubt whether it would take much to modify it to exercise the cards noted above. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
