Cortelco 2747 - Manual (Page 26)

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incoming calls. If the “Proxy On” flag is “No”, then the IP Phone does not
need to register. In this case, you can call the IP address of another IP Phone
directly.
(c). When the IP Phone is configured to use a gatekeeper or proxy server, but
has not yet registered successfully or failed, the LCD screen will display the
following message:
Registering (number)
Date Time
When the “Registering” message is displayed, the IP phone can not
make any calls. The menu selection and the on-hook / off-hook function
will work OK.
(d). If the IP Phone failed in registering to a H.323 gatekeeper or SIP proxy
server, the LCD screen will display the following message:
RegFail (failed message)
Date Time
The failed message could be one of the following:
(1). Duplicate: this means that the registering number is duplicated with
others, or the IP Phone’s previous registration information is still kept
in the gatekeeper/proxy server if not unregistered last time (this could
happen when the IP Phone is powered off instead of restarted from the
menu item). If the previous registration information is not cleared, you
may need to wait about 4 minutes to let the IP Phone register
successfully again.
(2). Security : this means that the account (username / password / H.323
ID) is not correct, please check your account again.
When the RegFail message is displayed, the IP phone can not make
any calls. The menu selection and the on-hook / off-hook function will work
OK.