Cisco 1240 Hardware Installation Manual page 48

Hardware Features Detailed Description
Serial Port Cables
You can order a Cisco RJ-45 shielded serial-transition cable that has the appropriate connector for the
standard you specify. The documentation for the device should indicate the standard used for that device.
The router end of the shielded serial transition cable has a DB-25 connector, which connects to the
DB-25 port on a serial grid router WAN interface card. The other end of the serial transition cable is
available with a connector appropriate for the standard you specify. The synchronous serial port can be
configured as DTE or DCE, depending on the attached cable.
Specifications
Table 3-16
Rate (bps)
2400
4800
9600
19200
38400
56000
1544000 (T1)
Specification
Connector type
Cable
.
Signaling
Max. drivers
Max. receivers
Operating mode
Network topology
Max. distance (standard)
Max speed
(at 12 m/1200 m)
Pinouts
Cisco 1240 Connected Grid Router Hardware Installation Guide
3-28
Serial Signal Transmission Speeds and Distances
Distance for
EIA/TIA-232
Feet Meters
200 60
100 30
50 15
25 7.6
12 3.7
8.6 2.6
— —
RS232
RJ-45
See the "Serial Port Cables" section
on page 3-28
Single-ended
1
1
Full duplex
Point-to-point
15 m
20 Kbps/1 Kbps
See Appendix B, "Connector and Cable Specifications"
Chapter 3 Router Hardware Description
RS485
RJ-45
See the "Serial Port Cables" section
on page 3-28
Differential
32
256
Half duplex
Full duplex
Multipoint
Multipoint is not enabled by
Note
software.
1200 m
35 Mbms/100 Kbps
OL-26223-04