K ccitt v.35 pinouts for mc2 – CANOGA PERKINS 2240 Fiber Optic Modem User Manual
Page 68
68
Canoga Perkins
Table 4-K.
CCITT V.35
Pinouts for MC2
Function
Pin
CCITT
Direction
(A/B) Circuit Number
Shield
A
101
-
Signal Ground
B
102
-
Request to Send (aka RTS)
C
105
to modem
Clear to Send (aka CTS)
D
106
from modem
Data Set Ready
E
107
from modem
Data Channel Receive Line
F
109
from modem
Signal Detector (aka DCD)
Data Terminal Ready
H
108
to modem
(aka DTR)
Calling Indicator (aka RI)
J
125
from modem
Local Loopback
L
141
to modem
Remote Loopback
N
140
to modem
Received Data (aka RXD)
R/T
104
from modem
Receiver Signal Element
V/X
115
from modem
Timing, DCE Source
(aka SCR)
Transmitted Data (aka TXD) P/S
103
to modem
Transmitter Signal Element
Y/AA
114
from modem
Timing, DCE Source
(aka SCT)
Transmitter Signal Element
U/W
113
to modem
Timing, DTE Source
(aka SCTE)
Test Indicator (aka TM)
NN
142
from modem
Extra Clock for Receive Data FF/DD *
-
to modem
* These pins carry signals which are not defined by V.35 or ISO 2593-1993.
If a straight-through cable is used, verify compatibility of this pin usage with
the customer's equipment.
NOTE 1: The 2240 connects the Shield pin to chassis ground.
NOTE 2: The extra clock signal is an enhancement added to -MC2 interfaces.
MC2 interfaces with this capability can be identified by the addition of a
heatsink on the voltage regulator, VR1.