DESCRIPTION
The PM7345 S/UNI-PDH is an ATM physical layer processor with integrated DS3 and E3 framing. PLCP sublayer DS1, DS3, E1, and E3 processing is supported as is ATM cell delineation.

FEATURES
• Implements the ATM Direct Cell Mapping into DS1, DS3, E1, E3 transmission systems according to ITU-T Draft Recommendation G.804.
• Implements the Physical Layer Convergence Protocol (PLCP) for DS1 and DS3 transmission systems according to the ATM Forum User Network Interface Specification and ANSI TA-TSY-000773, TA-TSY-000772, and E1 and E3 transmission systems according to the ETSI Draft Standards T/NA(91)17, and T/NA(91)18.
• Implements the ATM physical layer for Broadband ISDN according to ITU-T Recommendation I.432.
• Provides on-chip DS3 and E3 (G.751 and G.832) framers.
• Directly interfaces to available E3/DS3 line interface units.
• Uses the PMC-Sierra PM4341 T1XC, PM6341 E1XC, and PM4351 COMET framer/line interface chips for DS1 and E1 applications.
• Provides support for an arbitrary rate external transmission system interface up to a maximum rate of 52 Mbit/s.
• Support is provided for SMDS and ATM mappings into various rate transmission systems as defined below, as well as supporting the evolving mappings defined in G.804:
• Provides an 8-bit microprocessor interface for configuration, control and status monitoring.
• Low power CMOS technology.
• Available in a high density 100-pin PQFP package, or in an 84-pin PLCC package which is pin-compatible with the PMC-Sierra PM7321 PLPP standard product.

APPLICATIONS
• ATM or SMDS Routers, Bridges, Switches, and Adapter Cards
• DQDB Access Units
• ATM and SMDS test equipment