Ring voltage
Sine: 54 V RMS typical (balanced ringing only)
Ring Frequency
25-100Hz
Maximum Ringer Load
Ringer Equivalency Number (REN) 3
Loop Impedance (including
phone impedance)
Up to 1500 ohm for the MP-11x, Up to 1600 ohm for the MP-124
Lifeline
Supported in all ports of Mixed FXS/FXO and in first port of MP-
114/FXS and MP-118/FXS using special Lifeline cable
Caller ID
Bellcore GR-30-CORE Type 1 using Bell 202 FSK modulation, ETSI
Type 1, NTT, Denmark, India, Brazil, British and DTMF ETSI CID
(ETS 300-659-1)
Polarity Reversal / Wink
Immediate or smooth to prevent erroneous ringing
Metering Tones
12/16 KHz sinusoidal bursts, Generation on FXS
Distinctive Ringing
By frequency (15-100 Hz) and cadence patterns
Message Waiting Indication
DC voltage generation (TIA/EIA-464-B), V23 FSK data, Stutter dial
tone
Outdoor Protection
Over-voltage protection and surge immunity. This applies only to the
MP-124 FXS telephony cables, which can be routed outdoors. In
such a case, power surge protection means are required (refer to the
Installation Manual for detailed instructions).
Notes:
 Supported only on MP-124D.
 MP-124 devices are indoor units and therefore, must be installed
only INDOORS.
 The Ethernet port interface cabling must be routed only indoors
and must not exit the building.
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