Cisco NIM-4MFT-T1/E1= Fourth-Generation Multi-Flex Trunk Voice/Clear-Channel Data T1/E1 - Expansion Module

I am the lead developer on the dotty project dotty is a set of open source Linux kernel direct for various types of telephony hardware it's basically what connects asterisk to the physical world okay so in my talk today I'd like to talk about at e1 and e1 technology where it's been as a history where it is today and all of the bits and framing and coding and stuff that goes along with that we'll talk about the history will cover frankly encoding we'll talk about loops and how they're used we'll talk about alarms with the used for the two types of signaling we'll talk about how timing is propagated in the whole system and we'll walk through dotty and see how data gets from the line up through dotty and into asterisk okay 1876 the very first Astrakhan check out check out these like they all have handlebar mustaches that I wish we did too but seriously this is a Graham Bell this was very f