B-22
Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide
78-15827-06B0
Appendix B Cable Specifications
Serial Connection Signals and Pinouts
EIA-530 Interface
This section contains the following topics:
•
EIA-530 Connections
•
EIA-530 Serial Cable Assembly
EIA-530 Connections
EIA-530, which supports balanced transmission, provides the increased functionality, speed, and
distance of EIA/TIA-449 on the smaller DB-25 connector used for EIA/TIA-232, instead of the 37-pin
connectors used for EIA/TIA-449. Like EIA/TIA-449, EIA-530 refers to the electrical specifications of
EIA/TIA-422 and EIA/TIA-423. Although the specification recommends a maximum speed of 2 Mbps,
EIA-530 is used successfully at 4 Mbps or faster speeds over short distances.
The EIA-530 adapter cable is available in DTE mode only. The network end of the EIA-530 adapter
cable is a standard DB-25 plug commonly used for EIA/TIA-232 connections.
Figure B-15
shows the
DB-25 connector at the network end of the adapter cable.
Figure B-15 EIA-530 Adapter Cable Connector, Network End
EIA-530 Serial Cable Assembly
Figure B-16
shows the EIA-530 serial cable assembly, and
Table B-16
lists the pinout. Arrows indicate
signal direction: —> means DTE to DCE and <— means DCE to DTE.
The EIA-530 interface cannot be operated in DCE mode, and no DCE cable is available for it.
Figure B-16 EIA-530 Serial Cable Assembly
DTE
H1615a
H1972
60-pin connector (J1)
25-pin connector (J2)
Connectors are not to scale.
J2-13
J2-25
J2-14
J2-1
J1-46
J1-45
J1-16
J1-15
J1-1
J1-30
J1-31
J1-60