54
C
HAPTER
7: B
ASIC
T
ELEPHONE
O
PERATION
3
To end the call, replace the handset, or press the
Speaker
button, or
press the
Release
button.
Making a Call to a
Remote Office
You can dial calls between sites in your organization that are separated
geographically but that are linked by a Wide Area Network (WAN)
connection. Each site must have an VCX system. Typical configurations
are described in the next sections.
Using Unique Extensions
In some companies with geographically separated offices, everyone in the
entire organization has a unique telephone extension. Whenever you
make a call to an extension that is not located at your own site, your VCX
system sets up a connection to the VCX system at the other extension’s
site.
For example, suppose a company has three offices:
■
Phones at the Chicago office use an extension range from 1000
through 1999.
■
Phones at the Atlanta office use an extension range from 2000
through 2999.
■
Phones at the Dallas office use an extension range from 3000 through
3999.
In this example, to call a user in Dallas, a user in Chicago dials a Dallas
extension (3000 through 3999). The dial plan on the Chicago VCX system
sets up the necessary connection to the Dallas VCX system and then to
the extension at that site.
Using Site Codes
In some companies with geographically separated offices, phone
extensions may not be unique. If some users have overlapping telephone
extensions, your administrator can configure your telephone system to
require site codes that you must use to dial people at remote offices. Your
administrator chooses the site codes for your system. In this case, you dial
a site code first, followed by the extension at the site.
For example, suppose a company has three offices:
■
Phones at the Chicago office use an extension range from 1000
through 3999. The site code for Chicago is 61.
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