The E1/T1 Primer covers the fundamentals of time division multiplexing (TDM):
- Analog to digital conversion of a voice signal
- E1/T1 transmission formats
- Drop and insert
- Synchronization
- Testing
SDH Primer 
(Coming Soon)
SONET Primer (Coming Soon)
The SONET / SDH primer provides an overview of SONET / SDH Technology its uses and applications.
- SONET / SDH Basics
- SONET / SDH Frame Structure (Payload and Overhead)
- SONET / SDH Network Elements
- SONET / SDH Topologies
- SONET / SDH Applications
The IP Primer covers the relevance of internet technologies in the telecommunications world:
- Introduction to Internet Protocol (IP)
- Telecom vs computer networks in a building
- IP transmission equipment: micro-bridge, hub, switch, router
- Telecom transmission equipment: cross-connect, multiplexer
- Point-to-Point Ethernet bridge
- Ethernet Hub - Layer 2 bridging
- Integrated IP and TDM network
- IP over TDM network
- TDM vs ATM vs IP
