MH89760B/790B
MT8920B
(Mode 2)
MT8977/79
DIP
Switch
D
0
-D
7
STo0
STi0
STo1
CSTi0
CSTo
CSTi1
C4i
F0i
C1.5i
†
+5V
††
RxD
F0i
C2i
Rx
Line
Receiver
RxA
RxB
DSTi
DSTo
TxA
TxB
Tx
Line
Driver
EQU
A
0
-A
5
HIGH
SPEED
PARALLEL
TELECOM
BUS
CS
MH89761*
R/W
OE
MMS MS1 24/32
+5V
MT8920B
(Mode 1)
E1.5i
†
(E2i
††
)
E8Ko
STo0
STi0
STo1
Clock
Extractor
†
D
0
-D
7
A
0
-A
5
SIGNALLING
AND LINK
CONTROL
BUS
C4i
F0i
CS
DS
R/W
DTACK
MT8940
†
C1.5o
†
12.355
†
MHz Osc.
F0i
†
C2o
F0b
C4b
C8Kb
16.388
MHz Osc.
IRQ
IACK
MMS
+5V
CMOS
NOTES:
† Signals applicable to T1-ESF applications using MT8977 and MH89760B
†† Signals applicable to CRC-4 CEPT applications using MT8979 and MH89790B
* Equalizer MH89761 available for T1/ESF applications
MT8920B
3-15
Figure 11 - Typical T1-ESF / CRC-4 CEPT Digital Trunk Configuration
MITEL [ MITEL NETWORKS CORPORATION ]
