User's Manual

• 6-digit survivable extension numbers of which the first 3 digits are equal to the branch
prefix e.g. 811250.
• Dial 9 prefix for outgoing PSTN calls.
• National and international calls allowed but routed via the headquarters site's PSTN
trunks.
• Where a national call matches a branch location, it should be routed to the PSTN via that
branch.
• Local calls allowed from each branch using its own PSTN trunks.
• Modular Messaging at the headquarters site provides voicemail services to all
employees.
• The LAN on each branch has a unique IP address, 192.168.42.1, 192.168.44.1 and so
on.
• A number of survivability features are required:
• National calls via the branch's PSTN trunks when the branch data connection to the
headquarters site is not available or at maximum capacity.
• Modular Messaging fallback via PSTN.
This example assumes that all the branches were initially setup with the default North American
locale. For B5800 Branch Gateway that means that a dial 9 prefix is used for external calls.
For calls in other locales or between branches in different locals, the example will need to be
adjusted to ensure that the resulting number received at the remote branch will be routed to
an external PSTN trunk and is suitable for external dialing.
Voicemail considerations
The B5800 Branch Gateway system uses its Embedded Voicemail by default. However, a
number of other voicemail options are supported.
• Embedded Voicemail — Embedded Voicemail uses the system SD card in the B5800
Branch Gateway system control unit for storage of prompts and messages. Embedded
Voicemail supports mailboxes for all local extension numbers, announcements to waiting
callers, and auto attendants (up to 40) for external calls. Its capacity is limited to 15 hours
of recorded messages, prompts and announcements. At least one Embedded Messaging
Port license must be purchased to enable this service.
• Voicemail Pro — Voicemail Pro runs on a server PC connected to the B5800 Branch
Gateway system and provides a wide range of features. Voicemail Pro is the only option
that supports manual call recording for the B5800 Branch Gateway system users. It also
supports automatic call recording for the B5800 Branch Gateway system. At least one
Voicemail Pro license must be purchased to enable this service.
• Modular Messaging — The B5800 Branch Gateway system can be configured to use
Modular Messaging as its voicemail server. When Modular Messaging is used as the
Voicemail considerations
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