LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP Chapter 14: Appendix133EN14.2 Contact assignment14.2.1 ADSL interface6-pin RJ11 socket14.2.2 ISDN interface ⌧8-pin RJ45 socket, corresponding to ISO 8877, EN 60603-7, assembled asISDN-TE for direct connection to an ISDN exchange line (NTBA)Connector Pin IAE1 –2 –3 a4 b5 –6 –Connector Pin Line IAE1 – –2 – –3 T+ 2a4 R+ 1a5 R- 1b6 T- 2b7 – –8 – –