Operation Manual
EF1210 U
SER
M
ANUAL
22 http://www.aspi.com Copyright © 1999, All Rights Reserved
Phone Add.
• Connect the external power supply to the P
OWER
S
UPPLY
I
NPUT
jack of the
EF1210.
Playback/Record
The EF1210 provides the capability to record and play back audio to your conference.
Playback allows you to play the audio output of an external device, such as a televi-
sion or VCR, to the conference. Record allows you to record the audio of the confer-
ence to an external device, such as a tape recorder.
To implement the playback function with the EF1210, a playback signal must be
added to both the local audio (Zone) output and the remote output (the signal sent to
the CODEC or other terminal communication device). To implement the record
function, both the local audio and the remote CODEC signal must be mixed and out-
put to a recording device. Since the remote output will normally be produced by an
automixer external to the EF1210, the output of the automixer must be available to be
mixed with the R
EC
and A
UX
I
N
signals. This mixing may be implemented using an
external matrix mixer if available, or using the internal mixers provided in the
EF1210. In addition to the convenience of using the EF1210 mixers, the EF1210 pro-
vides remote control of the level of the A
UX
I
N
signal so that weak recordings may be
boosted to be audible at both ends.
To use the EF1210 Playback mixer, the output of the automixer must be brought in to
the A
MIX
I
N
input on the EF1210, and the input to the CODEC (or other remote ter-
minal device) must be taken from the T
O
CODEC output of the EF1210. The A
UX
I
N
input on the EF1210 will be added internally to the T
O
CODEC signal, and also to the
Z
ONE
A output.
Note.
The external RS-232 control device may be connected to any ASPI
device to control all ASPI devices that are linked via the ASPI Bus.
Figure 6.
Block diagram of record and playback connections with the EF1210.
EF1210
CH 1
CH 8
CH 7
CH 6
CH 5
CH 4
CH 3
CH 2
OUT 1
OUT 8
OUT 7
OUT 6
OUT 5
OUT 4
OUT 3
OUT 2
ZONE A
Auto
Mixer
CODEC
REC
AUX
IN
TO
CODEC
AMIX
IN
TAPE RECORDER
auto-reverse
12:00
VCR
AEC A