Telephone Protocols - NAPNAP

NAPNAP
Pediatric Telephone Protocols: Office Version (Spiral), by Barton D. Schmitt, (March 15, 2000) American Academy of Pediatrics; ISBN: 1581100337

Data Network Analyser - About Protocols - Data Network Sniffer
There are hardware telephone protocols. There are protocols between each of several functional layers and each corresponding layer at the other end of a