# CX 2000C board features

CX 2000C boards are station interfaces for Enterprise markets. They provide analog interfaces to analog devices such as telephones, fax machines, and modems within a private network. They can be used to build such systems as private branch exchanges, automatic call distributors, and IP-PBXs.

In a system containing CX 2000C boards, any communication with the public network is performed by trunk interface boards (such as CG 6000Cs or AG 4000Cs). CX 2000C boards communicate with these boards over the H.110 bus.

CX 2000C boards have sufficient on-board DSP resources for simple, low-level call control functions. More complex, resource-intensive operations (such as voice play or record functions) must be performed by other boards (such as the CG 6000C or AG 4000C).

Typical system including CX 2000C boards

The following table describes each CX 2000C board model:

Board model | Features | Limitations
--- | --- | ---
CX 2000C-32 | Supports up to 32 stations Maximizes airflow and reduces heat Uses only J5 for telco lines Provides high ring capacity | Requires external ring voltage supply
CX 2000C-32-R | Supports up to 32 stations Maximizes airflow and reduces heat Uses only J5 for telco lines Requires 24-32V DC talk battery power supply only | Limited ring capacity (12 simultaneous ringing telephones) Less than 2000 feet of cable to telephone
CX 2000C-48 | Supports up to 48 stations Offers highest density for applications where number of stations simultaneously active is low Uses J3 and J5 for telco lines. (J3 must have proper safety clearance. Refer to System requirements.) Provides high ring capacity | Requires external ring voltage supply Requires chassis features described in Selecting a CompactPCI chassis Limited to applications where less than 24 stations are in continuous operation due to heat issues

The following table summarizes the CX 2000C board features:

Feature | CX 2000C-32 | CX 2000C-32-R | CX 2000C-48
Chassis type | CompactPCI | CompactPCI | CompactPCI
Number of ports | 32 | 32 | 48
CT bus | H.110 | H.110 | H.110
Call center applications | Supported | Supported | Not supported
PBX applications | Supported | Supported | Supported
Detect on/off hook | Supported | Supported | Supported
Detect flash-hook | Supported | Supported | Supported
DTMF detection | Supported | Supported | Supported
DTMF generation | Supported | Supported | Supported
Dial tone | Supported | Supported | Supported
Call progress tones | Supported | Supported | Supported
CT bus switching API | Supported | Supported | Supported
Heart beat diagnostic | Supported | Supported | Supported
Transmit gain | Supported | Supported | Supported
Receive gain | Supported | Supported | Supported
Temperature sensors | Supported | Supported | Supported
On premise extensions | Supported | Supported | Supported
Off premise extensions | Supported | Not supported | Supported
Wiring between buildings | Supported | Supported | Supported
Internal ringing supply | Not supported | Supported | Not supported
Easy chassis selection | Supported | Supported | Not supported. Because the CX 2000C-48 exceeds the 32-line CompactPCI specification, selecting a chassis for these applications has special considerations. For details, refer to Selecting a CompactPCI chassis.
Hot Swap | Supported | Supported | Supported

The CX 2000C fully supports the H.110 bus specification. Switching is implemented with the T8100A chip. The T8100A offers full support for the H.110 bus within the H.110 architecture providing access to all 4096 slots on the bus.

On the boards, switch connections are allowed for up to 128 full duplex connections between local devices and the bus. Non-blocking switch connections are allowed between local devices.

## Power supply

To provide power for talk battery and for ringing station phones (if necessary), an external power supply is required. NMS Communications supplies a rack mount power supply chassis that can contain up to four interchangeable supply modules. Alternatively, you can obtain a power supply from another source. You can connect the power supply to each board. Alternately, if you are using a CompactPCI chassis whose backplane has a telecom power bus, you can use a single cable to connect one of the modules to the bus.

For more information on choosing and connecting power supplies, refer to Using the NMS rack mount power supply chassis.

## Developer's cable kit

To make connecting telephones to CX 2000C boards easier, a developer's cable kit is available. It consists of the following components:

- Two RJ-21, twenty-five pair, 10 feet cables

- Two breakout boxes RJ-21 to 25 RJ-11

For more information about the developer's cable kit, refer to Connecting to station telephones.