ZyXEL Communications IP PBX X6004 - Manual (Page 59)

Chapter 3 Tutorials
X6004 User’s Guide
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is 99. The SIP username for extension 1001 is 1001 and the SIP password for
this extension is 11100199. You do not need to configure the Prefix and Postfix
values as long as the SIP password length is at least four digits long. Click Apply
and wait for the X6004 to create the ten extensions.
6
The SIP extensions display as shown here.