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GS-MPIFW
Broadcasters' Mobile Phone Interface With Twin Four Wire Circuit

Features Description Technical Information Downloads Ask a Question
  • A quad band GSM phone
  • Two four wire / IFB circuits
  • An extra comms channel
  • Low cost backup

Quad Band
The GS-MPIs contain a quad band mobile phone, that will allow the unit to be used in most places of the world, where standard GSM networks are available. If your own mobile phone works, the GS-MPIs will work too. The SIM card fits into a front panel slot and is recessed to avoid accidental removal during operation.

Broadcast Headphone Connection 
There is a 6.35mm headphone socket for connecting a pair of headphones or a headset. The units are optimised for an impedance from 200 - 2000 Ohms. As the MPIs will often be used in noisy environments, a high output level is available using a variety of broadcast headphones and headsets.

Independent Send & Return Audio Connections
GSM telephone balancing is offered with separate XLR audio connections for the send and return signal. The GS-MPIs offer 100% separation between the send and return paths. The send connection is on a balanced XLR (switchable with a mic input on the GS-MPI004). The return is on a balanced XLR and contains the return audio (caller) only. There is also independent level control for the send and return audio.

RF Shielding Of Audio Circuits
A carefully designed RF shield insulates the audio circuits from all radio frequency interference. The GS-MPIs own RF does not interfere with its own audio circuits ensuring that typical GSM RF interference is never heard. 

Auto Answer
There is a configurable auto-answer, from off to 9 rings.

Memory Dialing
There are 10 memories for instant memory dialling of popular numbers.

Simple LED Status Indication 
A red and green LED indicate network and call status.

SMA Aerial Connection
A standard SMA aerial connection is provided for the attached right angle antenna (GS-MPI004) or a separate extension aerial (all rack units)

Two x Four Wire/IFB Circuits
Each circuit can be used independently in four wire mode

Versatile Four Wire Output Options (Programme, GSM, IFB)
1. An external programme input can be switched onto either four wire output
2. The incoming audio from the GSM call can be switched onto either four wire output.
3. One circuit's four wire input can be switched to its output. 

Interrupted Feed Back
When the talk button is pressed the talk audio can either replace the selected output or mix over it (IFB).

LEDs & Loop Outputs
Green LEDs give visual indication of return audio, and a d-type connector on rear with loops is active when talkback 1 or 2 are selected.

Two Position Speak Key
The speak keys are in push to talk mode when pushed down, or latch when pushed up. There is a front panel mic or connection for external mic.

Front Panel Monitoring 
There is a front panel speaker, with a 6.35mm headphone socket that mutes the speaker when headphones are connected. Adjustable volume control. Programme, phone, and four wire inputs are all mixed here for monitoring.

Front Panel Mic Input
There is a panel mounted microphone and an XLR socket to connect an external mic if required.

VERSIONS
GS-MPI004 Portable belt pack style
GS-MPI005 19 inch 1RU including 1 x GSM telephone
GS-MPI006 19 inch 1RU including 1 x GSM telephone & twin G722/G711 ISDN codec
GS-MPIFW 19 inch 1RU including 1 x GSM telephone and 2 x IFB four wire circuits

AUDIO SPECIFICATIONS - ALL UNITS
LINE IN / OUT CONNECTORS Neutrik XLRs
LINE INPUT LEVEL 0dB
INPUT GAIN CONTROL +/- 10dB
HEADROOM 26dB
OUTPUT LEVEL 0dB
OUTPUT GAIN CONTROL +/- 10dB
MAX OUTPUT LEVEL (Line out with XLR) +13dBu
HEADPHONE SOCKETS 6.35mm jack socket
HEADPHONE IMPEDANCE 200-2000 Ohms

GSM SPECIFICATIONS
AUDIO FREQUENCY RESPONSE Telephone networks provide 300Hz to 3.4 kHz audio bandwidth
QUAD BAND GSM FREQUENCIES 850 MHz, 1800 MHz, 1900 MHz
NETWORK Will operate on any mobile phone network, with any SIM card
RF OUTPUT POWER 2 Watts
AERIAL CONNECTOR TYPE SMA

POWER
GS-MPI004
- BATTERIES 4 x AA cells. When ‘low battery’ LED flashes there is approx. 30 mins remaining
- EXTERNAL DC INPUT +9 to +12 volts. 2.5mm barrel connector, centre +ve

GS-MPI005, GS-MPI006, GS-MPIFW
- INTERNAL SWITCH MODE POWER SUPPLY 100-240V 50-60 Hz

SPECIFIC SPECIFICATIONS - GS-MPI004 (PORTABLE GSM)
HEIGHT 45.7mm
WIDTH 148.6mm
DEPTH (Excluding Connectors) 138.4mm
MICROPHONE INPUT Neutrik XLR
MIC INPUT LEVEL -54 dB

SPECIFIC SPECIFICATIONS - GS-MPI005 (RACKMOUNT GSM)
HEIGHT 1RU
WIDTH 290mm (19”)
DEPTH (Excluding Connectors) 258mm 

SPECIFIC SPECIFICATIONS - GS-MPIFW (RACKMOUNT GSM WITH 4W)
HEIGHT 1RU
WIDTH 290mm (19”)
DEPTH (Excluding Connectors) 208mm
FOUR WIRE CIRCUITS 2

SPECIFIC SPECIFICATIONS - GS-MPI006 (RACKMOUNT GSM WITH ISDN)
HEIGHT 1RU
WIDTH 290mm (19”)
DEPTH (Excluding Connectors) 256mm
ISDN Twin G722 and G711
ISDN DIALLING DTMF via phone or external remote
REMOTE RS232
BUS TYPE S Connector

ACCESSORIES
EXTERNAL AERIAL T-bar
PLUG TOP POWER SUPPLY FOR GS-MPI004 UK 3 pin plug 100-240V 50-60 Hz

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International: +44 1622 753662
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