DATA SHEET
PMC-920702
ISSUE 5
PM8313 D3MX
M13 MULTIPLEXER
• Optionally inserts the C-bit parity mode path maintenance data link signal
from a 28.2 kbit/s serial input.
Each M23 multiplexer section:
• Multiplexes 7 DS2 bit streams into a single M23 format DS3 bit stream.
• Performs required bit stuffing including generation of C-bits.
• Includes required FIFO buffers for rate adaptation in the multiplex path.
• Allows insertion of per DS2 payload loopback requests encoded in the
transmitted C-bits to be activated or cleared under microprocessor control.
• Provides generated DS2 clock for use in integrated M13 or C-bit parity
multiplex applications.
• Demultiplexes a single M23 format DS3 bit stream into 7 DS2 bit streams.
• Performs required bit destuffing including interpretation of C-bits.
• Detects per DS2 payload loopback requests encoded in the received C-bits.
• Allows per DS2 payload loopback to be activated or cleared under
microprocessor control.
• Allows per DS2 alarm indication signal (AIS) to be activated or cleared for
either direction under microprocessor control.
• Allows DS2 alarm indication signal (AIS) to be activated or cleared in the
demultiplex direction automatically upon loss of DS3 frame alignment or
signal.
• Supports C-bit parity DS3 format.
Each DS2 framer and M12 multiplexer section:
• Supports two asynchronous multiplexing standards: the combination of four
DS1 bit streams into a single M12 format DS2 bit stream and the combination
of three 2048 kbit/s tributaries into a 6312 kbit/s high speed signal according
to CCITT Recommendation G.747.
• Frames to either a DS2 or G.747 signal.
3