Physical Description - Nortel Meridian 1 Succession 1000 Description

Meridian European digital telephones: M3110, M3310, and M3820
Meridian digital telephones used with a headset

Physical description

Table 48
Meridian digital telephone general features (Part 1 of 2)
Feature
Handsfree, On-Hook Dialling, and Group Listening
Dedicated Release and Hold keys
Message Waiting and Speaker/Mute Indicators
Headset Socket
2 x 24 character display
Feature keys including:
• Store/program key
• system programmable keys
You can use an electret headset in the headset port of the digital telephones
(M3310 and M3820 only). Alternatively, choose an amplified headset that
draws power from a battery or AC transformer; power is not provided by the
telephone. The amplifier must draw less than 400 micro amps from the
telephone jack.
The headset should be designed to work with a telephone jack with these
characteristics:
Transmit interface: +5 V through 10K DC bias resistance with maximum
current of 500 micro amps. The differential input impedance is 10K ohms.
Connects to pins 2 and 5 of the headset jack.
Receive interface: single ended output with output impedance of 180 ohms.
Connects to pins 3 and 4 of the headset jack.
Meridian digital telephones support many general features as illustrated in
Table 48.
M3820 M3310
yes yes
yes yes
yes yes
yes yes
yes yes
20 10
yes yes
13 7
Telephones and Consoles
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M3110
yes
yes
yes
no
no
10
no
8
Description