You should also be aware of the following ANSI Standard: T1.409 "Network to Customer Installation Interfaces - Analog Voicegrade Special Access Lines Using E&M Signaling". This is an 18-page document that appears to describe the E&M interface variants quite comprehensively. David Drori, Novarex Enterprises Ltd., Jerusalem, Israel [email protected]
RCIC - http://www.rcic.com Regulatory Compliance Information Center
