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Appendix B
Cable Specifications
This appendix describes the signals associated with the pins on the cable connectors for the service port and the WANs supported by the GTS 205 and GTS 250. Use this information when ordering custom cables from your supplier.
LAN and ISDN ports use industry-standard cables. Contact your cable supplier for more information.
Service Port
WANs
EIA 232D/V.24
V.35
V.36
X.21
Service Port
Table B-1 lists pin assignments for the GTS 205 and GTS 250 service ports and the service port cable.
WANs
CAUTION:
All GTS 205 and GTS 250 cables (and wrap plugs) are labeled with part numbers. Check these numbers to be sure you are using the proper cable.
For a custom cable, use a 26-pin dual slimline male connector (AMP p/n 750850-2 and 750833-1) and the appropriate connector for the DCE/DTE. The following list gives the conformity for the EIA and CCITT connectors:
Bulk cable consists of the appropriate numbers of 28 American Wire Gauge (AWG) tin-plated copper individually shielded pairs, with an overall shield. The nominal characteristic impedance of the bulk cable should be 85 ohms. The cable should meet the safety requirements of the appropriate local safety organization.
The length of the connection from the GTS to the attached equipment should not exceed 15 m (50 feet).
The tables in the following sections show the wiring of these cables.
Disclaimer
The information in this appendix does not guarantee function or compliance with radio frequency interference (RFI) or electromagnetic interference (EMI) regulations.
EIA 232D/V.24
V.35
Table B-4 V.35 Connector Pin Assignments, 34-pin Block, DTE Male - Modem Attach
|
Signal
|
WAN Port Pin Number
|
DCE End Pin Number
|
|
Send Data |
6, 5 |
P, S |
|
Signal Ground |
19, 23, 26 |
B |
|
Receive Data |
2, 1 |
R, T |
|
Data Set Ready |
13 |
E |
|
Send Timing |
12, 11 |
Y, AA |
|
Receive Timing |
4, 3 |
V, X |
|
Terminal Timing |
8, 7 |
U, W |
|
Clear To Send |
14 |
D |
|
Local Loopback |
15 |
L |
|
Call Indicator |
17 |
J |
|
Data Terminal Ready |
20 |
H |
|
Request To Send |
22 |
C |
|
Data Carrier Detect |
24 |
F |
Table B-5 V.35 Connector Pin Assignments, 34-pin Block,
DCE Female - Direct Attach
|
Signal
|
WAN Port Pin Number
|
DTE End Pin Number
|
|
Send Data |
2, 1 |
P, S |
|
Signal Ground |
19, 23, 26 |
B |
|
Receive Data |
6, 5 |
R, T |
|
Data Set Ready |
13, 20 |
E |
|
Send Timing |
8, 7 |
Y, AA |
|
Receive Timing |
8, 7 |
V, X |
|
Clear To Send |
15 |
D |
|
Request To Send |
24 |
C |
|
Data Carrier Detect |
22, 14 |
F |
V.36
Table B-6 V.36 Connector Pin Assignments, 37-pin D, DTE Male - Modem Attach
|
Signal
|
WAN Port Pin Number
|
DCE End Pin Number
|
|
Send Data |
6, 5 |
4, 22 |
|
Signal Return DCE |
19 |
20 |
|
Signal Return DTE |
23 |
37 |
|
Receive Data |
2, 1 |
6, 24 |
|
Data Set Ready |
13 |
11 |
|
Send Timing |
12, 11 |
5, 23 |
|
Receive Timing |
4, 3 |
8, 26 |
|
Clear To Send |
14 |
9 |
|
Local Loopback |
15 |
10 |
|
Call Indicator |
17 |
16 |
|
Data Terminal Ready |
20 |
12 |
|
Request To Send |
22 |
7 |
|
Data Carrier Detect |
24 |
13 |
X.21
Table B-7 X.21 Connector Pin Assignments, 15-pin D, DTE Male
|
Signal
|
WAN Port Pin Number
|
DCE End Pin Number
|
|
Send Data |
6, 5 |
2, 9 |
|
Signal Ground |
23 |
8 |
|
Receive Data |
2, 1 |
4, 11 |
|
Control |
10, 9 |
3, 10 |
|
Indicate |
24, 26 |
5, 12 |
|
Signal (Clock) |
4, 3 |
6, 13 |
|
Terminal Timing |
8, 7 |
7, 14 |
Table B-8 X.21 Connector Pin Assignments, 15-pin D, DCE Female
|
Signal
|
WAN Port Pin Number
|
DCE End Pin Number
|
|
Send Data |
5, 6 |
4, 11 |
|
Signal Ground |
23 |
8 |
|
Receive Data |
1, 2 |
2,9 |
|
Control |
9, 10 |
5, 12 |
|
Indicate |
24, 26 |
3, 10 |
|
Signal (Clock) |
7, 8 |
6, 13 |
|
Terminal Timing |
3,4 |
7, 14 |
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