Technical data

PAGE 110

Interfaces

A3.1.3 Handset/Telephone interface

To this interface you can connect a telephone handset/headset for the

PreTalk.

In the analogue POTS operating mode it is also possible to connect a standard

analogue telephone, through which the connection can be established and the

Pre Talk be carried out.

ATTENTION Pin assignment not standardised

Please notice that the Pin assignment of the telephone receivers is not stand-

ardised. Additionally, it is important to consider the correct polarity of the

Phantom Power.

If you connect an analogue telephone, please use Pin 3 + 4 only.

Please use 6-pole RJ12 Western connectors only since if a 4-pole Western con-

nector is used several contacts can be bent.

An analogue telephone, telephone handset and headset are optionally avail-

able.

TAB. 7 PIN ASSIGNMENT: ANALOGUE TELEPHONE /HANDSET INTERFACE

(HANDSET/PHONE)

Socket: Western (6-pole) RJ12

Pin Signal Electrical characteristics

1 HANDSET OUT a Microphone:

Impedance: ~ 2 kOhm

Sensitivity: ~ -60 dB @ 1-kHz

Telephone receiver:

Impedance: ~150 Ohm

Sensitivity: ~ 97dB @ 1-kHz

2HANDSET OUT b

3 TELEPHONE a

4 TELEPHONE b

5 HANDSET IN a/+5V phantom power

6HANDSET IN b