ADTRAN 1204006L1 Bedienungsanleitung Seite 56

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40 FSU 5622 ESP User Manual 61200.175L1-1
Chapter 4. Applications
Direct Mode Application
Direct mode is used to set up a typical FXS/FXO extension
arrangement. In this mode, the local unit is connected to a PBX
via an FXO module. The remote unit uses an FXS module to
connect the telephone sets. In this arrangement, the local PBX
extensions are extended across the frame relay or point-to-point
DDS circuit. In direct mode, the FSU FSU 5622 ESP is transpar-
ent to the telephone circuit. All signalling information is gener-
ated/detected by the attached PBX/telephone.
For direct mode, the DLCI for each voice port must be pro-
grammed. In the case of a frame relay circuit, this is the local
DLCI that the voice data is to be carried on. For a point-to-point
circuit, the DLCI value must be non-zero and it must be the same
on both ends of the circuit. See Figure 4-9.
PBX
FSU 5622
FRAME
RELAY
FSU 5622
RD1
TD2
RD2
TDN RDN
TD1
ALM
/TST
1
A
C
B
4
D
F
E
SHIFT
DELETE
QUICK
NEXT
PREV
ADD
7
2
5
#
3
6
9
8
0
FSU 5622
FXO
FSU 5622
RD1
TD2
RD2
TDN RDN
TD1
ALM
/TST
1
A
C
B
4
D
F
E
SHIFT
DELETE
QUICK
NEXT
PREV
ADD
7
2
5
#
3
6
9
8
0
DLCI= 100
EXT. 1000
EXT. 1000
EXT. 1001
EXT. 1001
FXS
Mode=Direct
L1 DLCI=100
L2 DLCI=200
Mode=Direct
L1 DLCI=100
L2 DLCI=200
Figure 4-9
Direct Mode Application
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