Specifications

Appendix A
42
When the E1/DATA is ordered with a X.21 interface, the unit comes with a HDB26 male to DB15 Female
adapter cable, 1 meter long. The pin assignment follows the table below.
Abbreviation HDB26
PIN#
DB15
PIN#
X.21
Circuit
FG 1
↔
1 Shield
SG 7
↔
8 Ground
TD(A)
TD(B)
2
11
↔
↔
2
9
Transmit(A)
Transmit(B)
RD(A)
RD(B)
3
21
↔
↔
4
11
Receive(A)
Receive(B)
RTS(A)
RTS(B)
4
13
↔
3
10
Control(A)
Control(B)
DCD(A)
DCD(B)
8
26
↔
5
12
Indication(A)
Indication(B)
ETC(A)
ETC(B)
24
16
↔
↔
7
14
Ext. Timing(A)
Ext. Timing(B)
RC(A)
RC(B)
17
25
↔
↔
6
13
Signal Timing(A)
Signal Timing(B)
Table 2-6 DATA X.21 cable
When the E1/DATA is ordered with a RS-232 interface, the unit comes with a HDB26 male to DB25 Female
adapter cable, 1 meter long. The pin assignment follows the table below.
Abbreviation HDB26
PIN#
DB25
PIN#
RS-232
Circuit
FG 1
↔
1 Frame
SG 7
↔
7 SG
TD 2
Å
2 TD
RD 3
Æ
3 RD
RTS 4 RTS
CTS 5 5 CTS
DSR 6 6 DSR
DTR 20
↔
20 DTR
DCD 8 8 DCD
ETC 24 24 ETC
TC 15 15 TC
RC 17 17 RC
Table 2-7 DATA RS-232 cable