Specifies the Music on Hold server address.
Examples for valid values: <10.1.3.165>, 10.1.3.165,
sip:moh@ucap.com, <sip:moh@ucap.com>,
<yealink.com> or yealink.com.
X ranges from 1 to 6.
Note: The DNS query in this parameter only supports
A query.
Enables or disables the IP phone to display the
available or unavailable soft key after the phone
logs into the ACD system.
X ranges from 1 to 6.