描述 Description

The TTSI4K32T Time-Slot Interchanger (TSI) switches data between 32 full-duplex, serial, timedivision multiplexed highways. The TTSI4K32T can make any connection between 4096 input and output time slots.

特性 Features

■ Thirty-two full-duplex, serial time-division multiplexed (TDM) highways.

■ Full availability, nonblocking 4096-channel time/ space switch.

■ 2.048 Mbits/s (32 time slots), 4.096 Mbits/s (64 time slots), or 8.192 Mbits/s (128 time slots) data rates, independently programmable per highway.

■ 64 kbits/s granularity with optional 32 kbits/s (4-bit) and 16 kbits/s (2-bit) subrate switching, selectable per highway.

■ Low-latency mode for voice channels.

■ Frame integrity for wideband data applications.

■ Concentration highway interface (CHI) compatible with the IOM2, GCI, K2, SLD, MVIP*, ST-Bus, SC-Bus, and H.100.

■ Single highway clock and frame synchronization input.

■ Independently programmable bit and byte offsets with 1/4 bit resolution for all highways.

■ Capable of broadcasting data to the transmit highways from a variety of sources including host data.

■ High-impedance control per time slot.

■ Software-compatible family of 1K, 2K, and 4K timeslot interchangers.

■ Thirty-two independent high-impedance indicators (output enables) for transmit highways, allowing external drivers.

■ Direct access to device registers, connection store, and data store via microprocessor interface.

■ IEEE?1149.1 boundary scan (JTAG).

■ Test-pattern generation and checking for on-line system testing (PRBS, QRSS, or user-defined byte).

■ User-accessible BIST for data and connection stores.

■ 3.3 V power supply with 5 V tolerant I/O.

■ Low-power, high-density CMOS technology, and TTL compatible switching thresholds.

■ 217-pin PBGA package.

■ –40 °C to +85 °C operating temperature range.

Applications

■ Small and medium digital switch matrices.

■ Computer telephony integration (CTI).

■ Access concentrators.

■ PABX.

■ Cellular infrastructure.

■ ISP modem banks.

■ T1/E1 multiplexers.

■ Digital cross connects.

■ Digital loop carriers.

■ Multiport DS1/E1 service cards.

■ LAN/WAN gateways.

■ TDM highway data rate adaptation.