5
X
RS-232,485 + 2
X
E
THERNET
/2 M
BIT
/
S
G.703 (G.704) M
ULTIPLEXER
O
PERATING
M
ANUAL
IOA81-1E
16
August 2004
Operating mode without interrupting the transmission path (Drop & Continue mode)
If the tributary channel equivalent to the nth time slot is selected and the CHANNEL
MODE OF OPERATION switch is set to the OR position, then the transmission path between
A and B ports for this slot is continuous.
In the example shown on Fig. 19 the C1 tributary channel is selected. This channel is as-
sociated with time slot number 2. Connection between ports A and B for the slot 2 is continu-
ous. Also, the connection between selected C1 channel and the port A through this slot is
closed.
Initial slot selected by using
CONFIGURATION switches
Output of line
port A
Input of line
port B
Input of line
port A
Output of line
port B
CHANNEL DIRECTION
TRIBUTARY CHANNEL
CONFIGURATION
A
B
C1
MODE OF OPERATION
Drop
Drop&co
Fig. 19.
Dropping the slots without interrupting the transmission path
3.8 Emergency
mode
At power failure the device connects the 2048 kbit/s transmission track between port A
and B in order to preserve discontinuity. Input of the A port is connected with the output of
port B, and the input of port B is connected to the output of port A.
Summary of Contents for TM-81.1
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