Nortel Meridian 1 Manual page 92

Page 88 of 144 Add-on modules
Table 20
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
108.2 20
Note: * Pin 1 is connected to the MCDS shelf frame.
** These leads are ignored by the MCA controller.
553-3001-215 Standard 12.00 January 2002
Adaptor cable
Abbr.
DB-25
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
DTR 20
Signal
Source
V.35
DTE MCA
Pin No.
A
P X
R
C X
D
E
B
F
CC/L
K X
X
S X
AA
Y
T
V
M/HH
H X
Description
Protective ground*
Transmit data A
X Receive data A
Request to send
X Clear to send
X Data set ready
Signal ground
X Carrier detect
No connection
**
X Serial clock receive B
Transmit data B
X Serial clock transmit B
X Serial clock transmit A
X Receive data B
X Serial clock receive A
No connection
Data terminal ready