Product Descriptions

The DS26528 is a single-chip 8-port framer and line interface unit (LIU) combination for T1, E1, and J1 applications. Each channel is independently configurable, supporting both long-haul and short-haul lines.

Product Features

ƒ Eight Complete T1, E1, or J1 Long-Haul/ShortHaul Transceivers (LIU plus Framer)

ƒ Independent T1, E1, or J1 Selections for Each Transceiver

ƒ Internal Software-Selectable Transmit- and Receive-Side Termination for 100Ω T1 Twisted Pair, 110Ω J1 Twisted Pair, 120Ω E1 Twisted Pair, and 75Ω E1 Coaxial Applications

ƒ Crystal-Less Jitter Attenuator can be Selected for Transmit or Receive Path; Jitter Attenuator Meets ETS CTR 12/13, ITU-T G.736, G.742, G.823, and AT&T Pub 62411

ƒ External Master Clock can be Multiple of 2.048MHz or 1.544MHz for T1/J1 or E1 Operation; This Clock is Internally Adapted for T1 or E1 Usage in the Host Mode

ƒ Receive-Signal Level Indication from -2.5dB to -36dB in T1 Mode and -2.5dB to -44dB in E1 Mode in Approximate 2.5dB Increments

ƒ Transmit Open- and Short-Circuit Detection

ƒ LIU LOS in Accordance with G.775, ETS 300 233, and T1.231

ƒ Transmit Synchronizer

ƒ Flexible Signaling Extraction and Insertion Using Either the System Interface or Microprocessor Port

ƒ Alarm Detection and Insertion

ƒ T1 Framing Formats of D4, SLC-96, and ESF

ƒ J1 Support

ƒ E1 G.704 and CRC-4 Multiframe

ƒ T1-to-E1 Conversion

Product Applications

Routers

Channel Service Units (CSUs)

Data Service Units (DSUs)

Muxes

Switches

Channel Banks

T1/E1 Test Equipment 

Product Specification

Product Photos

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