Nortel M3110 Installation Manual page 387

Appendix C: Meridian Modular Telephones add-on modules installation
Table 67
V.35 CCITT signals supported by the MCA (Part 1 of 2)
MCA
V.35 DB-25
CCITT pin no.
101 1
103A 2
104A 3
105 4
106 5
107 6
102 7
109 8
— 9/10
— 11
115B 12
103B 13
114B 14
114A 15
104B 16
115A 17
— 18/19
Note: * Pin 1 is connected to the MCDS shelf frame.
** These leads are ignored by the MCA controller.
See Table 67 for a listing of the V.35 CCITT signals supported by the MCA.
Adaptor cable
DB-25
Abbr. Pin No.
DG 1
SDA 2
RDA 3
RTS 4
CTS 5
DSR 6
S 7
CD 8
— 9/10
— 11
SCRB 12
SDB 13
SCTB 14
SCTA 15
RDB 16
SCRA 17
— 18/19
Telephones and Consoles
Signal
Source
V.35
Pin No. DTE MCA
A
P X
R X
C X
D X
E X
B
F X
CC/L
K X
X X
S X
AA X
Y
T
V
M/HH
Description, Installation, and Operation
Page 387 of 504
Description
Protective ground*
Transmit data A
Receive data A
Request to send
Clear to send
Data set ready
Signal ground
Carrier detect
No connection
**
Serial clock receive B
Transmit data B
Serial clock transmit B
X Serial clock transmit A
X Receive data B
X Serial clock receive A
No connection