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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
12
DS2 Framer Section:
Frames to a DS2 (ANSI T1.107 section 8) signal with a maximum average
reframe time of less than 7 ms (as required by TR-TSY-000009 Section 4.1.2
and TR-TSY-000191 Section 5.2).
Detects the DS2 alarm indication signal (AIS) in 9.9 ms in the presence of a
10-3 bit error rate.
Extracts the DS2 X-bit remote alarm indication (RAI) bit and indicates far end
receive failure (FERF).
Accumulates up to 255 DS2 M-bit or F-bit error events per second.
DS2 Transmitter Section:
Generates the required X, F, and M bits into the transmitted DS2 bit stream.
Allows inversion of inserted F or M bits for diagnostic purposes.
Provides for transmission of far end receive failure (FERF) and alarm
indication signal (AIS) under microprocessor control.
Provides optional automatic insertion of far end receive failure (FERF) on
detection of out of frame (OOF), alarm indication signal (AIS) or red alarm
condition.
M12 Multiplexer Section:
Multiplexes four DS1 bit streams into a single M12 format DS2 bit stream.
Performs required bit stuffing including generation and interpretation of C-
bits.
Includes required FIFO buffers for rate adaptation in the multiplex path.
Performs required inversion of second and fourth multiplexed DS1 streams
as required by ANSI T1.107 Section 7.2.
Allows insertion and detection of per DS1 payload loopback requests
encoded in the C-bits to be activated under microprocessor control.
Allows per tributary alarm indication signal (AIS) to be activated or cleared for
either direction under microprocessor control.