Multi-Tech Systems MVP210/410/810-FX ユーザーズマニュアル

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Chapter 4: Configuring your VOIP 
Multi-Tech 
Systems, 
Inc. 
     
 
 
53 
Call Signaling 
There are three types of Call Signaling available: H.323, SIP and SPP. Each type has some individual features 
that may make it more appealing to use than the others, depending on your needs. The –SS and –FX models do 
not support H.323 signaling. 
 
H.323 
H.323 is an ITU-T recommended set of standards for audio and video communications. The fields for this 
screen are defined in the table below. 
 
Figure 4-13: H.323 call signaling