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... The most common form of analog trunking is the E&M interface. E&M Signaling is commonly refer to as "ear & mouth" or "recEive and transMit", but its origin comes from the term earth and magnet. ...
E&M signaling defines a trunk circuit side and a signaling unit side for each connection similar to the data circuit-terminating equipment (DCE) and data terminal equipment (DTE) reference type. ...
Start Dial Supervision Signaling
Start dial supervision is the line protocol that defines how the equipment seizes the E&M trunk and passes the address signaling information such as dual tone multifrequency (DTMF) digits.
Approximate Word count = 361
Approximate Pages = 1.4
(250 words per page double spaced)
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