Milton Zucker wrote the following to All, and I quote (in part):
 MZ> I recently got a 56k modem using 56 k-flex technology and
 MZ> understand that the 56k standard won't work unless one of the
 MZ> connections is a digital connection such as used by an internet
 MZ> service provider such as AOL, Erols, etc.
That is basically correct, but you must understand that 56K technology is 
asymmetric, and follows a client-server motif. The 56Kbps signalling rate is 
only possible in the direction of the server to the client, requires that the 
server have a direct digital connection to the teleco network, and further 
requires that there be no more than one digital to analog conversion along 
the path from the server to the client. 
 MZ> Is the same limitation imposed by the X-2 standard (i.e., if 2 
 MZ> individuals with x-2 modems connect with each other, will the X-2 
 MZ> standard kick in or would one of the modems have to have a digit 
 MZ> connection?)
Between two client type X2 modems yes, but there are -two- types of consumer 
oriented X2 modems. There are the client types such as the Sportster and 
fully analog Courier, and a server capable varient of the Courier called an 
I-modem which combines an ISDN terminal adapter with all of the capabilities 
of the analog version. When a client X2 capable modem calls a server enabled 
I-modem, X2 signalling rates are possible, and the same is true when an X2 
enabled I-modem calls an X2 capable client. Symmetric X2 links are also 
possible between Courier I-modems.
Regards....
Craig
aka: cford@ix.netcom.com
   : craig.ford@2001.conchbbs.com
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