Nortel Meridian 1 Description

Also see for M3905: Reference guide Installation and administration guide User guide User guide Installation guide

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Nortel Meridian 1 Description Manual pdf 32 page image

Page 32 of 104 M2000 Series Meridian Digital Telephones553-3001-108 Standard 9.00 April 2000Note: Use only the line cord provided with the M2000 Series MeridianDigital Telephone. Using a cord designed for other digital telephonescould result in damage to the cord/loss of set functionality.Power requirementsThe M2006, M2008, M2008HF, M2616 (basic configuration and withDisplay module), and M2216ACD-1 are loop powered. Loop power,originating in the ISDLC or the DLC, consists of a 30 V dc power source andassumes a 3500 ft. (1219 m) maximum loop length of 24 AWG (0.5 mm)wire and a minimum 15.5 V dc 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 M2008HF/M2616,requires no additional power.Some configurations of telephones and options need more than basic looppower to operate. Table 4 lists the types of M2000 Series Meridian DigitalTelephones for NTZK telephones (Table 4 for NT2K telephones) and showswhen additional power is needed to operate the telephone or its optionalhardware. Power Supply Boards come installed in factory-assembledconfigurations that require additional power.Note 1: If a power failure occurs, configurations that require loop powerwill continue to work only if the system has battery backup. Only thoseoptions that require additional power will cease to function.Note 2: During a power failure, the carbon agent headset on theM2216ACD-2 will fail and the electret supervisor’s jack can be used asan agent jack. If no headset is plugged in to the electret jack during powerfailure, the call is dropped, and the agent is logged off and must log inagain once the electret headset is plugged in. When power is restored, thecarbon jack returns automatically. Power supply boardThe power supply option consists of a power supply board that mounts insidethe telephone, coupled with an external wall-mount transformer or closetpower supply that provides power to the power supply board. The powersupply board receives its power through pins 1 and 6 of the line cord.