Configuring Class of Service 65
Figure 17 Phone Book Page
Configuring Class of Service
When you create a phone extension, you assign the extension to a phone
profile (see Managing Phone Extensions). A phone profile includes a set
of common phone attributes, including a Class of Service (CoS). A CoS
determines the incoming and outgoing phone numbers a phone is
allowed to dial or receive.
Each Class of Service includes one or more elements. Each element
includes one or more dialing patterns. A pattern identifies a dial string
prefix. For example, your VCX system could include the following:
A Class of Service named Sample Class of Service, which includes:
A CoS element named Tol l, which includes:
Two patterns:
91900*
91976*
A CoS element can be configured to allow (whitelist) or block (blacklist)
an inbound or outbound call whose dial string matches the element’s
pattern (or patterns). So, for example, if you configured the Tol l element
to block outbound calls, any phone assigned to the Sample Class of
Service could not complete a call to a number whose dial string included
the prefix 91900 or 91976.