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Quad/x16/Octal—T1/E1/J1 Framers

The CX28394/28395/28398 is a family of multiple framers for T1/E1/J1 and Integrated Service Digital Network (ISDN) primary rate interfaces operating at 1.544 Mbps or 2.048 Mbps. All framers are totally independent, and each combines a sophisticated framing synchronizer and transmit/receive slip buffers. Operations are controlled through a series of memory-mapped registers accessible via a parallel microprocessor port. Extensive register support is provided for alarm and error monitoring, signaling supervision (including ISDN D-channel/SS7 process), per-channel trunk conditioning, and Facility Data Link (FDL) maintenance. A flexible serial Time Division Multiplexed (TDM) system interface that supports bus rates from 1.536 to 8.192 MHz is featured.

Extensive test and diagnostic functions include a full set of loopbacks, Pseudo Random Bit Sequence (PRBS) test pattern generation, Bit Error Rate (BER) meter, and forced error insertion.

Distinguishing Features

? Up to 16 T1/E1/J1 Framers in one package

? Extensive support of various protocols

? T1: SF, ESF, SLC?96, T1DM, TTC JT(J1)

? E1: PCM-30, G.704, G.706, G.732, ISDN primary rate (ETS300 011, INS 500)

? Extracts and inserts signaling bits

? Dual HDLC controllers per framer for data link and LAPD/SS7 signaling

? Two-frame transmit and receive PCM slip buffers

? Separate or multiplexed system bus interfaces

? Parallel 8-bit microprocessor port supports Intel or Motorola buses

? BERT generation and counting

? B8ZS/HDB3/Bit 7 zero suppression (CX28394 and CX28398 only)

? Operates from a single +3.3 Vdc ±5 power supply

? Low-power CMOS technology

Applications

? Multiline T1/E1 Channel Service Unit/Data Service Unit (CSU/DSU)

? Digital Access Cross-Connect System (DACS)

? T1/E1 Multiplexer (MUX)

? PBXs and PCM channel bank

? ISDN Primary Rate Access (PRA)

? Frame Relay Switches and Access Devices (FRADS)

? SONET/SDH add/drop multiplexers

? T3/E3 channelized access concentrators