Server; Chapter 6 Server; Overview - ZyXEL Communications X2002 User Manual

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This chapter shows you how to set up your X2002 SIP server settings on the

X2002. It also covers parameters for FXO/FXS, ISDN BRI/PRI channels, call

blocking settings, feature codes and email settings.

The following diagram shows SIP devices communicating with the X2002. In SIP

some devices act as clients and others as servers. For example, in the figure

below, devices A-D act as clients and must register with the X2002 before they

are able to make calls via the X2002. The X2002 also is a client in relation to the

SIP server located at the ITSP (F). The X2002 must register with the ITSP SIP

server before calls can be routed to telephones outside its network. Finally, two

SIP servers can act as peers, as shown with another X2002 (E) in the figure

below. In this case, both X2002s must register with each other before they can

forward each other's calls.

Figure 51 SIP Devices and the X2002

X2002 User's Guide

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