Aastra OpenCom 130 User Guide - Page 122
Aastra 673xi/675xi SIP Telephones, Aastra 673xi and Aastra 675xi SIP telephones, Model
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Voice over IP (VoIP) SIP Telephony Features Call transfer Blind Transfer Keypad as "INFO" message Notes before and during a call; operation must be available. SIP only: forwarding an incoming call without accepting the call; feature must be supported by SIP telephone or by the SIP software. DTMF tones cannot be securely transferred "in band" via compression codecs. Digital "out band" transferral as "INFO" SIP message or via RFC 2833/ 4733 is supported. This feature must be available and activated on a SIP telephone or in the SIP software. 9.4.3 Aastra 673xi/675xi SIP Telephones You can operate the SIP telephones of the Aastra 673xi and Aastra 675xi product families at the OpenCom 100 communications system. The firmware of the communications system already includes the matching firmware files for the following SIP telephones: Aastra 673xi and Aastra 675xi SIP telephones Model Aastra 6730i Short description Basic level version of the Aastra 673xi products, 5 volts input via wall power supply, display with 3 lines, 8 programmable keys, 2 line keys Aastra 6731i Similar to Aastra 6730i, but with 802.3af (PoE) power supply, two Ethernet ports for PC and LAN, separate 48 volts wall power supply available Aastra 6751i Aastra 6753i Basic level version of the Aastra 675xi products, display with 3 lines, 802.3af (PoE) power supply, two Ethernet ports for PC and LAN Similar to Aastra 6751i, but with headset connector, 6 programmable keys, 3 line keys, up to 3 key extensions with function keys 120