FEATURES

? Integrates eight E1 framers in a single device for terminating duplex E1

signals.

? Supports transfer of PCM data to/from 2.048 MHz system-side devices. Also

supports a fractional E1 system interface with independent ingress/egress

fractional E1 rates.

? Provides an optional backplane interface which is compatible with Mitel ST?-

bus, AT&T CHI? and MVIP PCM backplanes, supporting data rates of

2.048 Mbit/s and 8.192 Mbit/s. Up to four links may be byte interleaved on

each interface bus with no external circuitry.

? Extracts/inserts up to three HDLC links from/to arbitrary time slots to support

the D-channel for ISDN Primary Rate Interfaces and the C-channels for

V5.1/V5.2 interfaces as per ITU-T G.964, ITU-T G.965, ETS 300-324-1, and

ETS 300-347-1.

? Provides jitter attenuation in the receive and transmit directions.

? Provides per-channel payload loopback and per link diagnostic and line

loopbacks.

? Provides an integral pattern generator/detector that may be programmed to

generate and detect common pseudo-random (as recommended in ITU-T

O.151) or repetitive sequences. The programmed sequence may be

inserted/detected in the entire E1 frame, or on a fractional E1 basis, in both

the ingress and egress directions. Each framer possesses its own

independent pattern generator/detector, and each detector counts pattern

errors using a 32-bit saturating error counter.

? Provides signaling extraction and insertion on a per-channel basis.

? Software compatible with the PM6341 E1XC Single E1 Transceiver, the

PM6344 EQUAD Quad E1 Framer, the PM4388 TOCTL Octal T1 Framer, and

PM4351 COMET Combined E1/T1 Transceiver.

? Seamless interface to the PM4314 QDSX Quad Line Interface.

? Provides a IEEE P1149.1 (JTAG) compliant test access port (TAP) and

controller for boundary scan test.

? Provides an 8-bit microprocessor bus interface for configuration, control, and

status monitoring.

? Low power 3.3V CMOS technology with 5V tolerant inputs.

? Available in a 128 pin PQFP (14 mm by 20 mm) package.

? Provides a -40°C to +85°C Industrial temperature operating range.

APPLICATIONS

? High density Internet E1 interfaces for multiplexers, switches, routers and digital modems.

? Frame Relay switches and access devices (FRADS)

? SONET/SDH Add Drop Multiplexers

? Digital Private Branch Exchanges (PBX)

? E1 Channel Service Units (CSU) and Data Service Units (DSU)

? E1 Channel Banks and Multiplexers

? Digital Access and Cross-Connect Systems (DACS)