Nortel Meridian 1 Manual page 93

Table 20
V.35 CCITT signals supported by the MCA (Part 2 of 2)
MCA
V.35
DB-25
CCITT
pin no.
— 21
125 22
113B 23
113A 24
— 25
Note: * Pin 1 is connected to the MCDS shelf frame.
** These leads are ignored by the MCA controller.
Adaptor cable
Abbr.
DB-25
Pin No.
— 21
RI 22
SCTEB 23
SCTEA 24
— 25
Procedure 1
Installing and removing the Meridian Communications Adapter or
Meridian Programmable Data Adapter
CAUTION WITH ESDS DEVICES
Before handling internal telephone components,
discharge static electricity from hands and tools by
touching any grounded metal surface or conductor.
If using a NT9K phone or the NT2K with date code of April 24, 1998 and
later, it is not necessary to install a Power Option board to operate the MCA.
1 Remove the handset and place the telephone upside down on top of a
level, solid work surface (a desktop, for example) covered with soft
material or paper to prevent damage to movable keys and the
telephone face.
2 Disconnect all cords from the telephone.
Add-on modules
Signal
Source
V.35
DTE MCA
Pin No.
EE
J
W X
U X
MM X
Telephone and Attendant Console Installation
Page 89 of 144
Description
No connection
X Ring indicator
Tran sign elemt time B
Tran sign elemt time A
**