Signal timing specifications for the MM712 support TDM bus timing in receive and transmit modes. The gateway supplies only +5 VDC and –48 VDC to the MM712 Media Module. Any other required voltages must be derived on the module.
MM712 provides loop range secondary protection. The MM712 is also self-protecting from an over-current condition on a tip and ring interface. The MM712 supports the following loop length:
5500 feet (1676 meters) over 0.65 mm (.025 in.) wire (22 AWG)
3500 feet (1067 meters) over 0.5 mm (.02 in.) wire (24 AWG)
2200 (671 meters) over 0.4 mm (.016 in.) wire (26 AWG)
Danger:
The ports on the MM712 are intended for in-building use only. Telephone lines connected to those ports are not to be routed out-of-building. Failure to comply with this restriction could cause harm to personnel or equipment.
