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Centralized Attendant Service Description and engineering
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Feature description
The Centralized Attendant Service (CAS) feature allows customers with
multiple locations to centralize their attendant services at a single location. A
typical CAS configuration consists of one or more Remote locations, each
served by its own switch and attendants, and a Main site location, where the
CAS attendants are located (see
). Each Remote location has access
to the Main CAS attendant through Release Link Trunks (RLT), which can
be either analog or digital. In addition, the Remote locations are
interconnected by TIE trunks.
The types of calls that require attendant assistance and can be handled by a
CAS attendant are as follows:
— Listed Directory Number (LDN) calls
— Dial “0” calls (“0” is optional if the Flexible Attendant Directory
Number is used)
— Recalls, intercepts, or transfers to attendant
— Operator-assisted calls for restricted telephones, giving access to
wide-area transmission service (WATS), Foreign Exchange (FX), and
Central Office (CO) trunks
When any of the preceding calls are placed, an idle Release Link Trunk
(RLT) at the Remote site is seized and the calls are presented to the CAS
attendant. If an idle RLT is not available, the calls are queued until one
becomes available. The CAS attendant can extend the call to a local or
Remote telephone.