YW H 201 U ser m anual
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5.2.3.
Protocol Settings
5.2.3.1 IAX2 setting
Fig 5.2.4 IAX2 Protocol Settings
IAX2 Registration
Enable/disable service by checking/clearing this box. To make
calls through Asterisk Server, please check this box; otherwise,
only IP-to IP calls is allowed.
IAX2 Server
Fill in the IP address or URI of Asterisk Server as is required.
IAX2 Server Port
Fill in the number of the Asterisk Server port. The default value is
4569 without otherwise specified.