C-36
MAX 3000 Installation and Basic Configuration Guide
Cables and Connectors
Serial host interface specifications
X.21 cabling
Lucent supplies a single X.21 cable. You can use the X.21 cable for connecting to generic
serial hosts. If your host is equipped with an X.21 interface, Figure C-20 and Table C-27 show
the pinouts for the host cable.
Figure C-20.X.21 cable to generic serial host
Table C-27. Pinouts for X.21 cable to generic serial host
Model Number MBHD-X21
Part number 2510-0098-001
Pair #
X.21 signal name
(MAX)
Equivalent V.35/RS-449
signal name
(MAX)
MAX male DB-44
(MAX)
Host female DA-15
1
G*
SGND*
25*
8
2
T(A)
T(B)
SD+
SD-
29
30
2
9
3
R(A)
R(B)
RD+
RD-
40
39
4
11
4
S(A)
S(B)
ST+
ST-
42
41
6
13
5
C(A)
I(A)
DTR
DCD
8
36
3
5
