3-26 ICX (International) issued December 1999 ICX-40-700Chapter 3. System Features Section 700 - OperationHardware Requirements• Analog devices must be connected to an analog port.DP/DTMF SLTsThe System supports both DP (rotary dial) and DTMF (push button) analog extension types.Considerations• The CPC card provides 4 DTMF receivers. Traffic levels may require that one or more MFR(DTMF) circuit cards be installed. Each MFR card provides 8 DTMF decoders.ISDN/BRI S-Point InterfaceThe System supports ISDN-BRI terminal devices for connection as extensions. The BRI provides 2 B(bearer) plus 1 D (data) channel support (2B +D; 192 kbps).ISDN/PRI S-Point InterfaceThe System supports ISDN-PRI terminal devices with the ISDN/PRI S Point Interface (VB-44540).The PRI provides 23 B (bearer) plus 1 D (data) channel support (23B +D; 1544 kbps).On the ICX, either 8, 16, or 24 circuits may be enabled on the interface. Each enabled group of 8circuits requires a slot position in the System. A fully used card uses 3 slot positions for the ICX (or 1slot for the S-ICX).Flexible Numbering PlanDescriptionThe System provides flexible numbering for feature access special numbers and extension numbers.The dialing plan allows settings for digits dialed at dial tone, digits dialed at ringback tone, digitsdialed at busy tone, two patterns of feature codes dialed at dial tone, two patterns of feature codesdialed at ringback tone, and two patterns of feature codes dialed at busy tone.Feature access codes can be used when replacing another PBX system with an ICX or S-ICX system.Rather than learning the new access codes, the System feature access codes can be changed to matchthe old system. As a result, telephone users are less confused by the change and the requirement forretraining is reduced. Two sets of feature access codes are available (one of the two must be assignedto the terminal).Free SlotDescriptionEach cabinet in the ICX System contains 12 free (universal) slots. The S-ICX cabinet contains 5 freeslots. These slots can be used for exchange line cards, extension cards, or certain option cards.Some circuit cards such as the Integrated Services Digital Network (ISDN) - Primary Rate Interface(PRI) card occupy more that one slot.
