If the original sources are too hard to come by, Uyless Black's Physical Layer Interfaces and Protocols goes into somewhat greater detail than the WAN CCNA book referred to in another reply.
----- Original Message ----- From: "Robert D. Cluett" To: Sent: 07 August 2002 8:09 pm Subject: WAN Layer 1 Book (Multiplexors, DACS, TxPorts, etc).// [7:50881] > Group > > Anyone know of a good layer 1 (WAN) book? > > R. Cluett, CCNA Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51021&t=51021 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
