Ethernet Connections - Cisco CISCO2515-RF - 2515 Router User Manual

EIA-530 Connections
The EIA-530 standard, 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 connector 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 serial transition cable (not included) 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, as shown in Figure 2-6. The end that connects to the serial port
on the rear panel of the router has a DB-60 connector. To order a cable, refer to the section
"Obtaining Service and Support" in the "Overview of the Router" chapter.
Figure 2-6

Ethernet Connections

The IEEE has established Ethernet as standard 802.3. The most common Ethernet
implementations are as follows:
•
10Base5 (AUI)—Ethernet on thick coaxial cable, also known as thick Ethernet. The
maximum segment distance is 1,640 feet (500 meters).
•
10Base2 (Thinnet)—Ethernet on thin coaxial cable, also known as thin Ethernet. The
maximum segment distance is 607 feet (185 meters).
•
10BaseT—Ethernet on unshielded twisted-pair (UTP) cable. The maximum segment
distance is 328 feet (100 meters). UTP cables look like the cables used for ordinary
telephones; however, UTP cables meet certain electrical standards that telephone cables
do not.
EIA-530 Serial Transition Cable Connector, Network End
Preparing to Connect to a Network
DTE
Preparing to Install the Router 2-15