Voice over IP (VoIP)VoIP System Telephones

Features

Notes

 

 

Blind Transfer

SIP only: forwarding an incoming call without

 

accepting the call; feature must be supported by SIP

 

telephone or by the SIP software.

 

 

Keypad as “INFO”

DTMF tones cannot be securely transferred “in band”

message

via compression codecs. Digital “out band” transferral

 

as “INFO” SIP message is supported. This feature must

 

be available and activated on a SIP telephone or in

 

the SIP software.

 

 

7.4VoIP System Telephones

The following telephones and software packages are available for VoIP system telephony:

Aastra 6773ip (OpenPhone 73 IP): This system telephone can be extended with up to three key extensions Aastra M671.

Aastra 6775ip (OpenPhone 75 IP): This system telephone can be extended with up to three key extensions Aastra M671 or Aastra M676).

Aastra 277xip (OpenPhone 7x IPC): This VoIP software offers the functionality of an IP system telephone using Windows 2000/XP executable software (see Aastra 277xip (OpenPhone 7x IPC) starting on page 79). This software also pro- vides local answering machine functionality and can be integrated into CTI applications.

The older VoIP system telephones OpenPhone 63 IP and OpenPhone 65 IP can still be used.

7.4.1 Device Properties

The VoIP system telephones offer the following specific device properties:

Two RJ45 connector ports are available for ethernet connection. The ports are connected to one another via the telephone’s internal switch. The switch sup- ports 10 Mbit/s or 100 Mbit/s full-duplex with priority given to VoIP data trans- mission.

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Aastra Telecom 800 manual VoIP System Telephones, Device Properties