Grandstream Networks GXP21 Series User Manual page 41

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# or SEND and a direct IP call to aaa.bbb.ccc.XXX will be completed. "aaa.bbb.ccc" is from the local IP
address regardless of subnet mask. The number #xx or #x are also valid. The leading 0 is not required
(but it's OK).
For example:
192.168.0.2 calling 192.168.0.3 — dial #3 followed by # or "SEND";
192.168.0.2 calling 192.168.0.23 — dial #23 followed by # "SEND";
192.168.0.2 calling 192.168.0.123 — dial #123 followed by # "SEND";
192.168.0.2: dial #3 and #03 and #003 results in the same call — call 192.168.0.3.
Note:
The # will represent colon ":" in direct IP call rather than SEND key as in normal phone call;
If you have a SIP server, configured, direct IP call still works. If you are using STUN, direct IP call
will also use STUN;
Configure the "User Random Port" to "No" when completing direct IP calls.
Virtual Multi-Purpose Keys
Web UI Configuration
Users can find new Virtual Multi-Purpose Keys (VPK) configuration under phone's web UI?Settings?
Programmable Keys?Virtual Multi-Purpose Keys tab. It is recommended to select "Reset" on this
page before configuring VPK here. By default, all fixed VPKs are listed.
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