Analog line interface requirements for the MM714 Analog Media Module

Last Updated : Nov 01, 2012 |
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The MM714 provides pass through for fax signal on its analog line ports.
The MM714 supports up to four analog telephone sets with:
  • An impedance range of Rs: 215 to 300 Ohms, Rp: 750 to 1000 Ohms, Cp: 115 to 220 pF
  • A ringing frequency range of 20 Hz, 25 Hz, or 50 Hz
  • A DC current range of 20 to 60 mA
  • A hook flash range of 90 to 1000 ms
The MM714 provides -48 VDC for ports that are set up as direct inward dialing (DID).