Cisco 2611 - Router - EN User Manual page 34

Preparing to Connect to a Network
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 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 2-12 shows the DB-25 connector at the network end of the
adapter cable.
Figure 2-12
2-20 Cisco 2600 Series Hardware Installation Guide
EIA-530 Adapter Cable Connector, Network End
DTE