From: Kevin Harris <[email protected]> Kevin,
>Could someone fill in a ISDN neophyte and let me know >what are the pin connections to the RJ 45 connector >for the transmit and receive pairs. It seems all the >data books that I have show typical circuits to use >with their chips but they don't go that last little >bit and show the pinout of the RJ 45 The ISDN DL NI (Digital Loop Network Interface) uses an FCC "Registered Jack" RJ-48, which is an 8-position "unkeyed" modular jack. It is wired to "Standard Jack" SJA-11 (ANSI T1.601), which is positions 4 & 5 of the 8-position pluge, i.e., the two center positions, and should not be polarity sensitive. However, please note that this is for the U-interface. The S/T-interface uses a 4-wire arrangement. ________________________________________________________________ John Combs, Senior Project Engineer, ITS/TestMark Laboratories Email: [email protected] URL: http://www.testmark.com
