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About This Publication 
xiv    Aastra – 2758-002 
Term  Definition 
MAC Address – 
Media Access 
Control 
A number located on the white sticker on the bottom of the phone 
that serves as a name for each phone. 
SIP – Session 
Initiation 
Protocol 
The protocol for VOIP and other text and multimedia sessions, such 
as instant messaging, video, online games and other services.  
VoIP – Voice 
Over IP 
A technology that allows you to make telephone calls using a 
broadband Internet connection instead of a regular (or analog) phone 
line. 
 
References 
The following publications provide related information. 
 
Title  Description 
Aastra Model 9133i IP Phone 
Installation Guide  
Installation and set-up instructions, general features and 
functions, and basic options list customization. This 
guide is included in the box with your phone.