Operating instructions

Section 700 - Operation Chapter 3. System Features
ICX-35-700 ICX (International), issued March/1998 55
Hardware Requirements
• T1 (USA), E&M (HK) or AC-15 (UK) Card
Considerations
•N/A
Non-Blocking Architecture
Description
The System is totally non-blocking. All extension and outside lines are available for use at the same
time.
Hardware Requirements
• The CPC96 supports up to 96 ports. The CPC288 supports up to 288 ports and should be
combined with time switch card TSW288. The CPC-576 supports up to 576 ports and should be
combined with time switch card TSW576.
Considerations
•N/A
Power Failure Transfer
Description
Power Failure Transfer provides telephone service to a limited number of Single Line Telephones
(SLTs) during a power failure. The SLTs are connected to the trunk via a Power Failure Unit (PFU). In
the event of a power failure, the power failure extensions have dial tone directly from the trunk.
(System features and restrictions do not apply.)
Hardware Requirements
• Power Failure Unit (VB-43703)
• An SLT that will be connected to the PFU.
Considerations
• Up to four SLTs can be connected to one PFU.
• For added protection against power outages, backup batteries can be installed in the System.
Backup batteries provide full telephone service and system features to all System extensions for
a limited amount of time. With maximum traffic, the backup batteries last up to 30 minutes.