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INT-9951 PCI ITU / CEPT E1 Demultiplexer

Functional Description

The INT-9951 is a demultiplexer for ITU/CEPT telecommunications standard E1 rate (2.048 Mbps) PCM signals. It is a single standard length PCI Bus printed circuit board that is compatible with many host computers and software operating systems. Software drivers are available for Windows NT/2000, Solaris (SPARC), Solaris 8 (Intel), Linux and Irix. Multiple INT-9951 demultiplexers may be installed in a single host computer, limited only by the number of free PCI slots available.

The E1 demultiplexer includes a 31 x 31 non-blocking crosspoint switch. This feature allows the user to assign any E1 PCM input timeslot (1 – 31) to any one or more of the 31 audio outputs. It permits applications such as activity scanning, output routing based on signal type recognition, and many others.

The INT-9951 E1 PCI demultiplexer accepts all of the following input signal types to facilitate integration with a wide variety of E1 sources:

  1. AMI/HDB3 conforming to ITU/CCITT standard G.703.

  2. ECL NRZ data and clock conforming to MECL 10K or 100K (single ended or differential pair).

  3. LVDS NRZ data and clock conforming to IEEE 1394.

  4. EIA RS-422 NRZ data and clock.

  5. PECL NRZ data and clock.

  6. TTL NRZ data and clock.

The LVDS, EIA RS-422, PECL and TTL inputs are optional and only one may be selected per PCB.

In addition to serving as the source for the E1 demultiplexer, any of the inputs listed above may be selected as the source for the following outputs:

  1. Two channels of AMI/HDB3 conforming to ITU/CCITT standard G.703.

  2. TTL NRZ data and clock.

These features allow the unit to serve both as an E1 demultiplexer and as a signal format converter. For example the LVDS input may be routed to both the E1 demultiplexer and the two AMI/HDB3 outputs, while simultaneously routing the ECL input to the TTL output.

The INT-9951 is comprised of a single PCI standard length multi-layer printed circuit card. It requires only +5V power from the PCI bus and is compatible with both +5V and +3.3V PCI bus host interface slots.

All user signal interfaces to the INT- 9951 are accommodated via a single 80-pin rear edge panel connector.

The INT-9951 provides no user selectable internal on card configuration options. There are no routine maintenance procedures. No periodic alignments or adjustments are required.


Sun, SunOS, Solaris and SPARC are trademarks of Sun Microsystems, Incorporated. EDT and Engineering Design Team are trademarks of Engineering Design Team, Inc. Windows NT and Windows 2000 are trademarks of Microsoft Corporation. Irix is a trademark of Silicon Graphics, Inc. Intel is a trademark of Intel Corporation

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