Router Card (WS-X3011) Configuration Note 9
Signaling Standards
Figure 3
EIA/TIA-232 Serial Transition Cable Connectors, Network End
EIA/TIA-449 Connections
The EIA/TIA-449 standard, which supports balanced and unbalanced transmissions, is a faster (up
to 2 Mbps faster) version of the EIA/TIA-232 standard and provides more functions and supports
transmissions over greater distances.
The network end of the EIA/TIA-449 serial transition cable (not included) provides a DB-37
connector, as shown in Figure 4. The end that connects to the serial port on the router card has a
DB-60 connector. EIA/TIA-449 serial transition cables are available with a DB-37 plug or
receptacle in either DTE or DCE mode. To order a cable, refer to the section “Obtaining Service and
Support” at the end of this document.
Figure 4
EIA/TIA-449 Serial Transition Cable Connectors, Network Ends
V.35 Connections
The V.35 standard is recommended for speeds up to 48 kbps, although in practice it is used
successfully at 4 Mbps.
The network end of the V.35 serial transition cable (not included) provides a standard 34-pin
Winchester-type connector, as shown in Figure 5. The end that connects to the serial port on the
router card has a DB-60 connector. V.35 cables are available with a standard V.35 plug or receptacle
in either DTE or DCE mode. To order a cable, refer to the section “Obtaining Service and Support”
at the end of this document.
Figure 5
V.35 Serial Transition Cable Connectors, Network Ends
H1343a
DTE
DCE
H1344a
DTE
DCE
H1616a
DTE
DCE
