Aastra OpenCom 510 User Guide - Page 63
Extensions and accessories for system telephones (OpenPhone 71
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Extensions and accessories for system telephones (OpenPhone 71, 73, 75) Power supply 7. Extensions and accessories for system telephones (OpenPhone 71, 73, 75) 7.1 Power supply unit The power supply unit 4516000 (in Britain operate only the AC adapter with the part no. 4516001)is required in the following cases: ■ when connecting a keypad extension to a OpenPhone 73/75 system telephone (see also the chapter Keypad extensions starting on page 62) ■ when using the OpenPhone 73/75 IP system telephone (with or without keypad extension) where no Power over LAN is available in the network Connecting the power supply unit to an IP telephone The connector for the power supply unit is in the bottom of the telephone's casing and is indicated by the symbol . 1. Plug the power supply unit's RJ45 jack into the socket provided. 2. Pass the power supply unit's cable through the recesses on the underside of the IP system telephone. 3. Connect the power supply unit to the mains power supply (see Connecting the keypad extension starting on page 63). 61