Configuring MICA modems.

[johnleeee]

Hello all,

could someone explain me how signal (analog and digital) is

processed with digital modems MICA (instaled for example in AS5300 or C3640 NM-30D). What happens?

Im interested mainly in following:

1.) When I do analog dial-up to RAS server with MICA modems- I think that analog signal is converted in first CO switch in PSTN to digital form but will this be converted to analog form or no? So MICA modem works only with digital form-is it true?

when conversion starts from analog to digital and

will fall back to analog when reach MICA modem.?

2.)MICA modems are connfigured with PRI lines obviously, so how will PRI handle incomming call when

I call with analog dial-up modem.

3.)What about digital modems? How it is handled with PRI and digital modems?

reg

jl

[mchin345]

Digital modems are much different than the analog modems that most people use in their PCs. But they all communicate with the analog modem at the other end of the phone line.They all require a digital connection to the telephone line (such as T1) and don't use serial ports for the interface to the computer. Instead,they interface directly to a computer bus via a special card(s) (which may also contain the "digital modems"). They are able to send at near 56k, something no analog modem can do. They are often a component of "remote access servers" (RASs) or "digital modem pools". You can find more information on digital modems at the following URL

http://www.tldp.org/HOWTO/Modem-HOWTO-3.html#digital_modem

[johnleeee]

Thanks for answer and advice (url).

Its sufficient.

rg

jl