3com VCX V7000 Owner's Manual Page 107

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Modifying a User’s Phone Settings 107
If the foreign call processor cannot contact the home call processor, the
user is denied access to the system because password verification is not
possible.
If the user's home call processor becomes unavailable after the user has
logged in, the foreign call processor deactivates the phone and only
allows outgoing emergency calls.
With the following possible exceptions, all phone features work for a
roaming user as they would if that user was connected to the home call
processor:
Emergency Calls — There are several important implications for
emergency calls made by a roaming user. See Emergency Calling
Considerations for Roaming Users.
Group Paging — Group paging may or may not work depending on
the router configuration in the path between the foreign call
processor and the home call processor. Routers must be configured for
multicast pass through to enable group paging.
BLF — Busy Lamp Flash may or may not work depending on firewall
or NAT settings (or both) in the path between foreign login point
(either the foreign phone or the location where the device connects to
the foreign network) and the location of the devices that are
monitored. As BLF depends on point-to-point messaging between the
devices involved, firewall and NAT settings must allow this messaging
to pass through in order for the BLF feature to function properly.
Number Translation — If you have set up number translation and
source-based routing for calls originating from a user’s home call
processor (configured as an indirect requestor), the settings will not
work when the user roams. To enable number translation to work on
a foreign call processor for a roaming user, you must configure the
same number translation, enable source-based routing, and specify
the IP address of the foreign call processor as the indirect requestor.
See Configuring Number Translation Patterns (DIRECTORY)
.
Modifying a User’s
Phone Settings
The following options are configured as part of the profile assigned to a
phone (see Creating a Phone Profile
):
Date and time formats
Ring tones for call waiting, inside, private, and outside calls
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