Nortel Networks M3110 User Manual
Page 388

Page 388 of 504
Appendix C: Meridian Modular Telephones add-on modules installation
553-3001-367 Standard 3.00 August 2005
Use the following procedures to add the Meridian Communications Adapter
(MCA) or Meridian Programmable Data Adapter (MPDA) to the telephone
and to connect it to a terminal or personal computer.
See the Meridian Communications Adapter User Guide for more information
on MCA operation.
108.2
20
DTR
20
H
X
Data terminal ready
—
21
—
21
EE
No connection
125
22
RI
22
J
X
Ring indicator
113B
23
SCTEB
23
W
X
Tran sign elemt time B
113A
24
SCTEA
24
U
X
Tran sign elemt time A
—
25
—
25
MM
X
**
Table 67
V.35 CCITT signals supported by the MCA (Part 2 of 2)
V.35
CCITT
MCA
DB-25
pin no.
Abbr.
Adaptor cable
Signal
Source
Description
DB-25
Pin No.
V.35
Pin No.
DTE
MCA
Note:
* Pin 1 is connected to the MCDS shelf frame.
** These leads are ignored by the MCA controller.
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