ISOSTEM USER MANUAL
ISOSTEM® Live - Integration 43
Single device setup and alarm/processing interaction:
ISOSTEM
DSP
Super-
visor
4
x
A
E
S
-I
N
4
x
A
E
S
-O
U
T
6 x GPI-
PRESET
R
S
-2
3
2
A
L
A
R
M
L
IN
K
OK status - no alarm (contacts closed)
Processing: AES-In → DSP → AES-Out
ISOSTEM
DSP
Super-
visor
4
x
A
E
S
-I
N
4
x
A
E
S
-O
U
T
6 x GPI-
PRESET
R
S
-2
3
2
A
L
A
R
M
LI
N
K
FAILURE status – alarm active (contacts open)
No Processing = Bypass: AES-In → AES-Out
In a single device setup, the link port is unused.
D
AISY
-C
HAINED
A
UDIO
R
OUTING AND
S
YSTEM
S
TATES
Two
ISOSTEM
®
Live are intended to operate as a redundant backup sys-
tem. A daisy-chained topology is the basic redundant setup (see schematic
below).
It must be noted that the daisy-chained setup may not apply to systems
intended to operate 24 hours and 7 days a week. This is due to the fact
that, in cases of failure, the audio chain is disconnected while exchanging
the failed device. 24/7-systems are handled by a parallel
ISOSTEM
®
Live
audio setup (see
).
The four AES-In signals from the audio uplink are wired to
ISOSTEM
®
#1,
its four AES-Out signals are wired to the next
ISOSTEM
®
(#2) and its four
AES-Out signals are wired to the system´s downlink device.
A CAT5-crosslink interconnection of the two link ports is required for proper
audio routing. If connected to both link ports, each
ISOSTEM
®
´s supervisor
handles this as a linked-condition.
Thus one of the two devices is forced to the processing state and the other
to the bypass state. The bypassing
ISOSTEM
®
is the backup device.
The user defines the initial processing-bypass state of both devices during
power-up. When linked, the device powered up as the first is automatically
the one in processing state. The second device power-up is automatically
forced to bypass audio.
