SoundCraft MBI 10 Series, User Manual

Page: 34 / 54

7HOFR&KDQQHO
Input Stage
The Telco module must be connected to the telephone system via a telephone hybrid
circuit. The Applications section of this manual gives more details.
1
The LINE input is a female XLR into which the output from an external
telephone hybrid may be plugged. It is a balanced input.
2
The C/F (Clean Feed) output is a male XLR connector which may be plugged
into the input of an external telephone hybrid. The Clean Feed signal (also known
as Mix Minus) is the programme output signal minus the phone signal. It is a
balanced output.
3
REMOTES Socket
This 25-way D-type female connector allows you to implement the following
facilities:
Telephone Divert
See Divert Switch.
Talkback Enable
This user-provided switch will, when closed, cause the Caller to hear a reduced
programme output plus the signal on the T/B OUTPUT bus. This bus will have the
signal from the inbuilt mic plus the signal from any of the Mono Input modules if
their respective Talkback Switches are closed (see the Applications section).
External Talkback
This allows the Producer to talk to the Caller. It consists of a balanced audio input
and also two contacts which may be shorted via a user-provided switch. When the
switch is closed the Caller will hear a reduced programme plus the input to the
External Talkback circuit (see the Applications section).
4
LINE (Coarse Adjust) allows the coarse adjustment of the Line input level.
5
C/F (Coarse Adjust) allows for the reduction, to a minimum, of the Caller’s
signal in the Clean Feed output. This is factory set and should not require further
adjustment.
6
The DIVERT switch on the module is a 1-pole 2-way switch; these connections
are available on the Remote socket. It is possible to connect this switch to the
external telephone hybrid to enable the Caller to be diverted to, for example, a
standard telephone. You will need to consult the telephone hybrid circuit’s
handbook for its requirements.
Auxiliary Send
7
The AUX control routes the Caller’s signal onto the Auxiliary Mix bus. The
signal may be fed to the Auxiliary control either pre-fade or post-fade. The factory
default is pre-fade but this may be changed via a link on the pcb (see the Applications
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
28 Telco Channel