Description
The Lucent Technologies Microelectronics Group TMPR28051 device is designed to map any valid combination of DS1 and E1 signals into a stream at a rate of 51.84 Mbits/s. This device provides all of the functions necessary to insert and drop any valid combination up to 28 asynchronous DS1 signals or 21 asynchronous E1 signals into an SPE.

Features
■ Maps signals in one of the following ways:
    — Maps up to 28 asynchronous DS1 signals to SONET STS-1 via VT Groups, or SDH AU-3 via TUG-2.
    — Maps up to 21 asynchronous E1 signals to SDH AU-3 via TUG-2, or SONET STS-1 via VT Groups.
    — Maps any valid combination of DS1/E1 signals at the VT Group/TUG-2 level.
■ PLL-free receive operation using built-in digital jitter attenuators.
■ High-speed microprocessor interface configurable to operate with most commercial microprocessors.
■ Inserts valid B1, B2, and B3 bit interleaved parity (BIP) in the transmit direction.
■ Detects and counts B1, B2, and B3 BIP-8 errors on either a bit or block basis for performance monitoring in the receive direction.
■ Detects and counts V5 BIP-2 errors on either a bit or block basis for performance monitoring.
■ Configurable continuous B1, B2, B3, and V5 BIP-2 error insertion.
■ Configurable remote error indication (REI) insertion for B2, B3, and V5 BIP-2 errors.
■ Detects and counts remote errors.
■ Built-in test pattern insertion and drop for setup and maintenance.
■ Configurable VT1.5/TU-11 slot selection for DS1 insertion and drop.
■ Configurable VT2/TU-12 slot selection for E1 insertion and drop.
■ Detects STS-1 path loss of pointer (LOP-P), loss of H4 multiframe (H4LOMF), path alarm indication signal (AIS-P), and path remote defect indication (RDI-P).
■ Automatic receive monitor functions include VT/TU remote defect indication (RDI-V), VT/TU remote error indication (REI-V), BIP-2 errors, VT/TU AIS (AIS-V), and VT/TU loss of pointer (LOP-V).
■ Automatic receive monitoring functions can be configured to provide an interrupt to the control system, or the device can be operated in a polled mode.
■ User configurable for VT/TU label, AIS-V, RDI-V, REI-V, force BIP-2 errors, or unequipped tributary insertion.
■ Typical 3.3 V operation with 5 V TTL tolerant I/O and boundary scan.
■ –40 °C to +85 °C temperature range.
■ 208-pin shrink quad flat pack (SQFP) package.
■ Provides alarm and control features to easily
    implement the latest release of the following standards:
    GR253-CORE (12/97 with the exception of
    GR-253 section 6.2.1.1.8.C), G.707 (3/96),
    G.783 (1/94), G.823.393, T1.105-1995,
    T1.105.02-1995, T1.105.03-1994,
    T1.105.03A-1995, T1.105.07-1996,
    T1.105.09-1996, ETS300.147 (1/95),
    ETS300.417-1-1 (1/96).

Applications
■ SONET/SDH path termination multiplexers
■ SONET/SDH add/drop multiplexers
■ SONET/SDH cross connects
■ Digital access cross connects
■ DS1/E1 broadcast
■ SONET/SDH test equipment