Multitech MMH900 User Manual page 122

Composite Link Cabling
RS232C/V.24 *Configured Composite Link
PIN NO.
PIN NO.
1 1
2 2
3 3
To
4 4
External
5 5
Synchronous
7 7
Modem/DSU
8 8
Connector
15 15
17 17
20 20
25 25
V. 3 5 A d a p t e r C a b l e C o n f i g u r e d o n a R S 2 3 2 C / V. 3 5 * *
V.35 34-PIN
CONNECTOR (MALE)
A
B
C
D
E
F
H
P
R
S
T
U
V
W
X
Y
a
* The MultiMux RS232C interface circuits have been designed to meet the
electrical specificaitons given in EIA (Electronic Industries Association RS232C
and CCITT (Consultative Committee International Telegraph and Telephone) V.24
Stanards.
** When configured for V.35 interface operation on composite link A or B, the
V.35 adapter cable should be used. This cable uses a 25-pin female connector at
one end and a 34-pin winchester male connector at the other end.
Appendix C - Cabling Diagrams
CHASSIS GROUND (AA)
TRANSMIT DATA (BA)
To
RECEIVE DATA (BB)
MultiMux
REQUEST TO SEND (CA)
External
CLEAR TO SEND (CB)
Modem/DSU
SIGNAL GROUND (AB)
Connector
CARRIER DETECT (CF)
TRANSMIT CLOCK (DB)
RECEIVE CLOCK (DD)
DATA TERMINAL READY (CD)
C o m p o s i t e L i n k
25-PIN
CONNECTOR (FEMALE)
1 PROTECTIVE GROUND
7 SIGNAL GROUND
4 REQUEST TO SEND
5 CLEAR TO SEND
6 DATA SET READY
8 DATA CARRIER DETECT
20 DATA TERMINAL READY
2 TRANSMIT DATA A
3 RECEIVE DATA A
12 TRANSMIT DATA B
22 RECEIVE DATA B
23 EXTERNAL TX CLOCK A
17 RECEIVE CLOCK A
25 EXTERNAL TX CLOCK B
18 RECEIVE CLOCK B
15 TRANSMIT CLOCK A
21 TRANSMIT CLOCK B
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