Specifications

Preparing to Install the Router 2-9
Preparing to Connect to a Network
Balanced drivers allow EIA/TIA-449 signals to travel greater distances than
the EIA/TIA-232 signals. Table 2-3 lists the maximum speeds and distances for
EIA/TIA-449, which are also valid for V.35, X.21, and EIA-530 signals.
Caution The EIA/TIA-449 and V.35 interfaces support data rates up to 2.048 Mbps.
Exceeding this maximum could result in loss of data and is not recommended.
Signaling Standards
The synchronous serial port supports the following signaling standards: EIA/TIA-232,
EIA/TIA-449, V.35, X.21, and EIA-530. You can order a DB-60 shielded serial transition
cable that has the appropriate connector for the standard you specify. The router end of the
shielded serial transition cable has a DB-60 connector, which connects to the serial port on
the rear panel of the router. The other end of the serial transition cable is available with the
connector appropriate for the standard you specify. The documentation for the device you
want to connect should indicate the standard used for that device. The synchronous serial
port can be configured as DTE or DCE (except EIA-530, which is DTE only), depending
on the attached cable.
Table 2-3 EIA/TIA-449, V.35, X.21, and EIA-530 Speed and Distance
Limitations
Data Rate
(Baud)
Distance
(Feet)
Distance
(Meters)
2400 4,100 1,250
4800 2,050 625
9600 1,025 312
19200 513 156
38400 256 78
56000 102 31