Document
CX28394/28395/28398
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
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Functional Block Diagram
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Receive Dual Rail or NRZ RX Slip Buffer Receive System Bus
• • • • •
ZCS* Decode
T1/E1 Receive Framer
Receive Dual Rail or NRZ
ZCS* Encode Overhead Insertion
TX Slip Buffer T1/E1 Transmit Framer
Transmit System Bus
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
Data Link Controllers DL1+DL2
• • • • • • •
. . .
Framer #1
External Data Link DL3*
Framer #N Control/Status Registers Framer #N
8394-8-5_019
JTAG
Test Port * CX28394 and CX28398 only.
Motorola/Intel Processor Bus
CX28394 - 4 Frames CX28398 - 8 Frames CX28395 - 16 Frames
Data Sheet
100054E June 2000
CX28398EVM—Evaluation Module, Octal T1/E1 ISDN PRI Board
T1 or E1 Connection at DSX Levels
Quad T1/E1 LIU (CX28380) Address Bus 12 Microprocessor Data Bus 8
Quad T1/E1 LIU (CX28380)
CX28398 (Octal T1/E1 Framer)
Local PCM Highway (i.e., 2 @ 8192 kbps)
8394-8-5_012
© 1999, 2000, Conexant Systems, Inc.
All Rights Reserved. Information in this document is provided in connection with Conexant Systems, Inc. (“Conexant”) products. These materials ar.