Hello David, Boy, do I love it when this topic re-surfaces!
Roger is correct, TBR21 4.2 for non-voice (i.e. fax/modem) loop-start connection references FCC 68.5 for the connection arrangement, which calls out the RJ11 designator. Therefore, one could not legally connect to an RJ11 PSTN circuit with the 8-position jack. Plus, as it has been noted, the mechanical fit would not be very good. If there are supply/modularity issues with using an 8-position jack on all of your product's telephony interfaces, you can use it as long as the connection arrangements of each country's local spec (pinouts, plating, tolerances, etc.) are met. In the instance of using an 8-position jack with only a 6-position plug (RJ11) there are companies which manufacture a spacer that populates the outer 2 pins. That way, if one has a variety of different interfaces and would like to use the same jack for each, simply inserting a spacer into the 8-position jack would render it compliant for a 6-position plug. I believe that Allen Tel Products: http://www.allentel.com/ ...makes an insert that serves this purpose. I hope this info helps out! Cheers, Len At 12:16 PM 12/14/99 -0500, you wrote: >Hello listmembers, > >Here is an interesting question put to me by our design engineers. They want >to >use RJ-45 jacks on all telephone interface types, including a standard >telephone >interface. Is there any problem from an approvals perspective using an RJ-11 >plug in an RJ-45 jack? Our designers claim they fit, but it seems forced to >me. >Opinions? > >Regards, > >David. > >David Gelfand >Approvals Group Leader >Memotec Communications Inc. --------------------------------------------------------------- Len Goldschmidt - Hardware Engineer CISCO SYSTEMS RIBU - Eng Ops | | Phone: (408) 526-6841 | | Fax: (408) 527-6887 ||| ||| 170 West Tasman Drive, M/S SJ-LINC4-1 .:|||||:..:|||||:. San Jose, CA 95134-1706 (U.S.A.) [email protected] ---------------------------------------------------------------
