Arun The wikipedia site has some information that may clarify your confusion. http://en.wikipedia.org/wiki/RJ48 http://en.wikipedia.org/wiki/Modular_connector From the latter: "One should distinguish the physical connector itself, which does not specify the wiring/pinout, from various standards such as registered jack (RJ) which specify the connector and the pinout; for instance, the 8P8C modular connector type is often loosely called RJ45 (for a standard that uses this connector), but 8P8C connectors are also used with different wiring, such as for Ethernet over twisted pair." The RJ48c standard also uses the 8P8C modular plug. Justin D. Smith R&D Engineer Tellabs, Inc. ============================================================ The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any reproduction, dissemination or distribution of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. Thank you. Tellabs ============================================================ ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu