Aastra OpenCom 510 User Guide - Page 46
Internal S0 Ports, 5.3 Upn Ports, 5.3.1 Terminals Connected to Upn Ports, PBX 1, S, RJ-45 socket
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Interfaces and Connectible Terminals PBX 1, S0 ext 12345678 Upn Ports 87654321 PBX 2, S0 ext (RJ-45 socket) Wiring for direct connection 5.2.3 Internal S0 Ports Up to eight ISDN terminals per bus can be connected to the internal S0 ports by means of four-wire cables. Three of these terminals can be supplied with power from the bus; any additional terminals will require their own power supply. The internal S0 buses can be used for point-to-multipoint connections in accordance with the DSS1 protocol (Euro ISDN). ISDN terminals can be connected to internal S0 ports by means of a crossed ISDN cable. For the pin assignment of crossed ISDN cables, refer to the illustration Wiring for direct connection on page 44. If the terminal did not come with a suitable ISDN cable, contact your dealer or DeTeWe distributor. The length of an internal S0 bus cable must not exceed 150 m. Each internal S0 bus has a power feed of approx. 3 W. The feed voltage is -42 V. 5.3 Upn Ports 5.3.1 Terminals Connected to Upn Ports Upn ports can be used to connect one of the following system terminal types: ■ RFP 22 DECT base station ■ OpenPhone 61, OpenPhone 63 or OpenPhone 65 system telephone ■ OpenPhone 52 ISDN system terminal 44