Cisco NIM-1MFT-T1/E1= Fourth-Generation Multi-flex Trunk Voice/Clear-channel Data T1/E1 Module - Expansion module - T-1/E-1 - for Cisco 4451-X

hey everybody its Kevin Wallace CC cie and Cisco press author and in this video I'm going to simplify connecting T 1 and E 1 circuits to Cisco routers you're going to learn how they work and how to set them up stay tuned we're starting off with a really fundamental topic today it's all about tea ones and a ones the theory behind how they work and we'll go out to a live interface and see how to set them up as well but let's begin by thinking more generically about digital circuits as compared to analog circuits we know that t1 Z ones they're digital circuits they're synchronized they have clocking the routers that we have or whatever device is terminating these circuits they know when one bit stops and another bit starts but one of the big advantages we have with digital circuits as opposed to analog circuits is with the digital circuit we can have multiple conversations going on at the