Depends on how deep you want to go... Syngress' Configuring Cisco Voice over IP is a good start, if a little old (2000).
If you are coming from the data side, The Essential Guide to Telecommunications by Dodd is a good primer on how the PSTN works. For the hard-core, Cisco Press has Cisco Voice over Frame Relay, ATM, and IP. This is a must for the CVoice exam. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39804&t=39741 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
