Nortel Networks M3110 - Manual (Page 345)

Appendix A: Meridian Modular Telephones Page 345 of 504
Telephones and Consoles Description, Installation, and Operation
Alerting tone characteristics
The tone frequency combinations are as follows:
M2006/M2008/M2008HF:
M2616/M2216ACD:
A 500 Hz buzz signal is provided for incoming call notification while the
receiver is off-hook.
Power requirements
The M2006, M2008, M2616 (basic configuration and with Display Module)
and M2216ACD-1 are loop powered. Loop power consists of a -30 V AC
power source and assumes a 3500 ft. (915 m) maximum loop length of 24
AWG wire and a minimum 15.5 V AC at the telephone terminals.
Note: The loop length limit is defined by a 15.5 dB loss at 256 KHz.
Longer lengths can be determined using the wire's gauge and insulation.
The Handsfree feature, which is integrated into the M2616, requires no
additional power.
Some configurations of telephones and options need more than basic loop
power to operate. Table 54 lists the Meridian Modular Telephones and shows
Tone Frequencies Warble Rate (Hz)
1 667 Hz, 500 Hz 10.4
2 667 Hz, 500 Hz 2.6
3 1600 Hz, 2000 Hz 10.4
4 1600 Hz, 2000 Hz 2.6
3 333 Hz, 250 Hz 10.4
4 333 Hz, 250 Hz 2.6