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3.5
Operating modes of the system
The following figures show the system in the different operating modes and
their respective cablings.
3.5.1
POTS operating mode
ATTENTION
Earthing
If the POTS interfaces are in operation, the system must be earthed via earth-
!
ing screw for EMC reasons. If the earthing is not carried out, the Audio signal
can be faulty on the caller's side (humming).
The minimal wiring for the operation with an analogue telephone line is pic-
tured in Fig. 4. Via the PHONE Interfaces up to two POTS telephones can be
connected for PRETALK if required.
ATTENTION
Connection of a POTS Telephone
Please note that the PHONE interfaces are implemented as 6-pole Western
!
sockets. Standard telephones with 4-pole Western connectors must not be
used because otherwise the contacts in the socket will be destroyed.
FIG. 4
Western connectors
Earthing!
Power supply
interface
POTS
interface
Option:
Telephone
The maximum wiring with all options is shown in Fig. 5. The LAN interface
allows the connection with a PC with Talkmaster XT
three PCs with Talkmaster XT
RS232 interface you can connect two b-line XT Keypads.
P u t t i n g
MINIMUM WIRING IN POTS OPERATING MODE
Use 6-pole
only!
t h e
s y s t e m
i n t o
Analogue Audio 1/AES/EBU Input
Analogue Audio 1/AES/EBU Output
®
Software. In total,
Software can access the system. Via the
®
o p e r a t i o n
P A G E 2 1
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