AVT MAGIC TH2, Hardware Manual

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PAGE 21
P u t t i n g i n t o O p e r a t i o n
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 Analogue POTS operating mode
The minimal wiring for the operation with an analogue telephone line is pic-
tured in Fig. 4. Via the optional analogue telephone the Pre Talk can be carried
out if required.
FIG. 4 MINIMUM WIRING IN ANALOGUE POTS OPERATING MODE
The maximum wiring with all options is shown in Fig. 5. The RS232 interface
allows the connection with a PC with MAGIC TH2 software or the application
of the MAGIC TH2 Keypad as alternative to the operation via the front key-
pad.
ATTENTION Earthing
If the analogue POTS interface is in operation, the system must be earthed via
earthing screw for EMC reasons. If the earthing is not carried out, the Audio
signal can be faulty on the caller’s side (humming).
ATTENTION Connection of an analogue telephone or a telephone handset
Please notice that the HANDSET/PHONE interface is implemented as 6-pole
Western socket. Standard telephones or handsets with 4-pole Western con-
nectors must not be used because otherwise the contacts in the socket will be
destroyed.
ATTENTION Connection of an analogue telephone
Please notice that in case of using an analogue telephone only Pin 3 & 4 of the
HANDSET/PHONE interface must be used. The Pins 1, 2, 5 and 6 of the inter-
face are used for connecting the handset and must not be occupied by the tel-
ephone.
!
!
Power supply
interface
POTS
Telephone
interface
Analogue Audio 1/(AES/EBU) Input
Analogue Audio 1/(AES/EBU) Output
Telephone
Option:
Earthing!
Use 6-pole
Western connectors
only!
!