Technical data

PAGE 104

Interfaces

A2.2 PRETALK interfaces

A2.2.1 HANDSET 1 & 2 interfaces

To these interfaces you can connect a telephone handset/headset for the

PRETALK.

A2.2.2 PHONE 1 & 2 interfaces

In the POTS operating mode, you can connect a POTS Telephone for

PRETALK and dialling to these interfaces.

ATTENTION Pin assignment not standardised

Please note that the Pin assignment of the telephone receivers is not standard-

ised. Additionally, it is important to consider the correct polarity of the Phan-

tom Power.

b-line XT Telephone Handsets and b-line XT Telephone Headsets are option-

ally available.

TAB. 7 PIN ASSIGNMENT: HANDSET/HEADSET INTERFACE (HANDSET)

Socket: Western (4 pin) RJ10

Pin Signal Electrical characteristics

1HANDSET IN a/+5V phantom power Microphone:

Impedance: ~ 2 kOhm

Sensitivity: ~ -60 dB @ 1-kHz

Telephone receiver:

Impedance: ~150 Ohm

Sensitivity: ~ 97dB @ 1-kHz

2HANDSET OUT b

3HANDSET OUT a

4HANDSET IN b

TAB. 8 PIN ASSIGNMENT: POTS TELEPHONE INTERFACE (PHONE)

Socket: Western (6 pin) RJ12

Pin Signal Electrical characteristics

1not used

2not used

3 TEL LINE a

4 TEL LINE b

5not used

6not used