
STANDARD PRODUCT
PM8315 TEMUX
DATASHEET
PMC-1981125
ISSUE 7
HIGH DENSITY T1/E1 FRAMER  WITH
INTEGRATED VT/TU MAPPER AND M13 MUX
PROPRIETARY AND CONFIDENTIAL
9
 Extracts up to 28 bit asynchronous mapped VT1.5 virtual tributaries from an
STS-1 SPE into T1 streams via an optional elastic store.
 Extracts up to 28 bit asynchronous mapped TU-11 tributary units from an
STM-1/VC4 TUG3 or STM-1/VC3 into T1 streams via an optional elastic
store.
 Extracts up to 21 bit asynchronous mapped VT2 virtual tributaries from an
STS-1 SPE into E1 streams via an optional elastic store.
 Extracts up to 21 bit asynchronous mapped TU-12 tributary units from an
STM-1/VC4 TUG3 or STM-1/VC3 into E1 or T1 streams via an optional
elastic store.
 Demapper ignores all transport overhead bytes, path overhead bytes and
stuff (R) bits
 Performs majority vote C-bit decoding to detect stuff requests.
SONET/SDH DS3 Mapper Section:
 Maps a DS3 stream into an STS-1 SPE (AU3).
 Sets all fixed stuff (R) bits to zeros or ones per microprocessor control
 Extracts a DS3 stream from an STS-1 SPE (AU3).
 Demapper ignores all transport overhead bytes, path overhead bytes and
stuff (R) bits
 Performs majority vote C-bit decoding to detect stuff requests
 Complies with DS3 to STS-1 asynchronous mapping standards
DS3 Receiver Section:
 Frames to a DS3 signal with a maximum average reframe time of less than
1.5 ms (as required by TR-TSY-000009 Section 4.1.2 and TR-TSY-000191
Section 5.2).
 Decodes a B3ZS-encoded signal and indicates line code violations. The
definition of line code violation is software selectable.