Cisco 6509 - Catalyst Chassis Switch Installation Manual page 291

Appendix B Transceivers, Module Connectors, and Cable Specifications
Figure B-12 RJ-21 Telco Interface Cable Connectors
Table B-12
polarized. One pin of each signal pair carries the positive (+) signal, and the other pin carries the negative
(–) signal.
Table B-12
Note
to the module.
Caution Category 5e and Category 6 cables can store large levels of static electricity because of the dielectric
properties of the materials used in their construction. Always ground the cables (especially in new cable
runs) to a suitable and safe earth ground before connecting them to the module.
To comply with GR-1089 intrabuilding, lightning immunity requirements, you must use foil-twisted pair
Caution
(FTP) cable that is properly grounded at both ends.
OL-5781-04
90
RJ-21
connector
180 RJ-21
connector
lists the output signals for the RJ-21 telco connector. The receive and transmit signals are
lists the output signals for the RJ-21 telco connector, not the pinouts of the cable connecting
RJ-21 port
110
RJ-21
connector
Catalyst 6500 Series Switches Installation Guide
Module Connectors
B-19