STANDARD PRODUCT
DATASHEET
PMC-1981125
ISSUE 7
DS2 Framer Section:
PM8315 TEMUX
HIGH DENSITY T1/E1 FRAMER WITH
INTEGRATED VT/TU MAPPER AND M13 MUX
• 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.
PROPRIETARY AND CONFIDENTIAL
12