Voice; Peripheral Equipment; Digital Line Module - Northern Telecom Meridian M3000 Reference Manual

2-4 General description
The power supply is connected to the M3000 Touchphone using a 4-pin
power connector.

Voice

The voice channel carries normal voice communication and signaling
messages between the Meridian SL-100 system and the M3000 Touchphone.
Messages from the Meridian SL-100 system to the hardware in the M3000
Touchphone control the handsfree unit and handset, and determine the status
of the M3000 Touchphone. Messages from the Meridian Sl-100 system to
the software in the M3000 Touchphone are used for the following:
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The M3000 Touchphone sends messages to the Meridian SL-100 system to
do the following:
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Peripheral equipment

Digital line module

The M3000 Touchphone interfaces with the Enhanced Digital Port card
(EDPC) in the Digital Line Module (DLM) of the Meridian SL-100 system
using Time Compression Multiplex (TCM) transmission. The EDPC
contains 16 Integrated Voice and Data (IVD) ports, which support 16 M2000
telephones and TADO.
555-4001-112 Standard 05.01 March 1995
WARNING
Telephone set damage
Do not plug M3000 Digital Telephone into a walljack
wired with -48 V for 2500 telephone sets. This causes
permanent damage to the M3000 telephone.
download data to the M3000 Touchphone
update the LCD screen
request diagnostic information from the M3000 Touchphone
request a partial or complete reset of the M3000 Touchphone
transmit a function number
request initialization data to be downloaded
send programmable key entries
send telephony path activations (hookswitch, handsfree, release)