Ericsson F251m Bedienungsanleitung PDF herunterladen (Seite 14)

GM29 TECHNICAL DESCRIPTION

LZT 123 7359 R1B

The power connector electrical characteristics are listed below:

3.2 Audio Connector

A 4-way RJ9 connector, as shown below, allows a telephone handset to

be plugged into the modem, giving access to the microphone and

earpiece signals. The connector may also be used to drive other

analogue audio sub-systems or devices.

The GM29 is configured to work with a range of handsets. If necessary,

changes can be made to the characteristics of the audio interface by

sending the modem appropriate AT commands.

Pin Signal Dir Limits Description

1 VCC I 5 - 32V Positive power input

2 - - - No connection

3 HR_IN I –0.5 - 32V Active high control line used to switch

off or reset the modem

> 5V, V

< 2V

Power off: 1s < t < 2s

Hard reset: t > 3.5s

4 TO_IN I –0.5 - 32V Active high control line used to switch

on the modem

> 5V, V

< 2V

Power on: t > 0.2s

5 - - - No connection

6 GND I - Negative power (ground) input and

return path for TO_IN and HR_IN

4321

1 MICN

2 BEARN

3 BEARP

4 MICP

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 29 30

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Ericsson F251m Bedienungsanleitung Seite 14