Telecom101

How Phones Work

Payphones

Phone FAQ

Voice Circuit

Load Coils & Bridge Taps

T-Carrier Terms

T1-E1 Line Coding

T1

T3

SONET and SDH

SONET/SDH References

Timing Synchronization
     (Stratum Levels, GPS)

Data Rates

CSU-DSU

Standalone vs 
    Integrated CSU.DSU

Channel Bank

Disaster Recovery

Zulu Time