M1050 RECORDER INTERFACE MODULE comcode: 407 153 089 pec code: 8807-008
INDEX Description Operation Connections Features Vox enable Switch hook Beep tone Radio interface Specifications

Description

The M1050 module incorporates a headset recorder interface, handset recorder interface, and a headset adapter (500A or 502C) into one module. The M1050 digital unit connects to the modular "AUX" jack of a digital set; the M1050 hybrid unit connects to a hybrid voice terminal. When used with digital sets an adjunct -48vdc power supply is required.

Operation

Two push button switches are located on top of the M1050. An LED in each button indicates if the switch is on. Pressing the "OFF HOOK" switch answers the call on the voice terminal. (Similar to lifting the handset.) Pressing the switch again turns off the adapter and disconnects the transmit and receive to the adapter, equivalent of going on-hook. The second switch is the "MUTE" switch. This switch mutes the 4 wire transmitter and handset transmit for privacy during a call.

Connections

The M1050 is equipped with modular jacks for most connections. The following jacks are provided:

• AUX - connects to the voice terminal AUX jack.
• HANDSET - connects to the handset of the voice terminal.
• AUDIO TO RECORDER - is a 4 wire line jack for recorder audio and recorder start closure.
• AUDIO TO RECORDER - phono jack connects to the mike input of cassette recorders.
• 4 WIRE AUDIO with OFF-HOOK CLOSURE - provides a 4 wire broadcast audio interface with an off-hook signal output and remote off-hook input.
• HEADSET - is for 2 prong headsets.
• MODULAR HEADSET - is for modular electret type headsets.
• SWITCH HOOK - is the switch hook trigger input from the voice terminal switch hook logic.
• TO VOICE TERMINAL - connects the voice terminal's handset transmit and receive audio to the M1050.

CONNECTION DIAGRAMS
Connection diagram for jacks on the front of the M1050
Connection diagram for jacks on the rear of the M1050

Features

The M1050 has three option settings:

1. Vox enable.
2. Negative switch hook.
3. Beep tone.

• Vox enable

  Use the vox enable option in the absence of a switch-hook logic connection. The switch-hook option should be "OFF" if the vox enable is "ON". When the vox enable is "ON", the recorder audio output of the M1050 is controlled by a solid-state relay that only passes audio to the AUDIO TO RECORDER jacks during the presence of audio. It has a holdover of 5 seconds.

• Switch hook

  This option determines the logic level detection of the voice terminal's switch hook logic. "OFF" sets the logic for "+", "ON" sets the logic for "-". If no connection is made to the switch-hook input a "+" setting leaves the recorder audio always on, a "-" setting leaves the recorder audio off.

• Beep tone

  The beep tone produces a 200ms 1khz tone burst every 15 seconds. The tone is audible to both parties. Beep tone generation is dependent on the vox and switch hook logic settings.

Radio interface

The 4 wire broadcast audio provides an interface between the operators Centracom II radio system and their telephone console through a single headset. The module is used with Motorola's Telephone/headset interface board. This allows the dispatcher to interface with radio traffic on a normal basis until a call on the telephone console is active.
With Motorola's Telephone/headset interface board connected and Motorola's headset jack plugged in, the selected audio from the console speaker is routed to the headset earphone. When the M1050 "OFF HOOK" button is pressed, an off-hook condition is established on the telephone console. The telephone receive audio is then routed to the earphone, while the radio select audio is routed back to the console speakers.
For additional information on the Telephone/headset Interface board operation, consult your Material representative.

Specifications

M1050
GENERAL	Size	7 6/8"L x 4 3/8"W x 1 3/8"H
	Weight	2.2oz
	Operating voltage	-48vdc
	Power consumption	.05mA
INCLUDED ITEMS	1ea. MA11 cable	2ft. length. Modular handset plug to modular handset plug. Non-coiled.
	1ea. MA10 cable	1ft. length. Modular handset plug to bare ends, 4 conductor.
	1ea. D8W-87-7 cable	cc# 103 786 786
	1ea. D8AC-87-7 cable	cc# 103 786 737
	1ea. D4BU-87-7 cable	cc# 102 479 904