Data Sheet
June 2002
TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
463
Agere Systems Inc.
20 M13/M23 MUX/DeMUX Block Functional Description
(continued)
20.1 M13 Introduction
The M13 block is a highly configurable multiplexer/demultiplexer. It can operate as an M13 in either the C-bit parity
or M23 mode, a mixed M13/M23, or an M23.
In the C-bit parity mode, the M13 provides a far-end alarm and control (FEAC) code generator and receiver, an
HDLC transmitter and receiver, and automatic far-end block error (FEBE) generation and detection.
Each internal M12 MUX/deMUX and the M23 MUX/deMUX may be configured to operate as independent MUX/
deMUX.
The M13 supports numerous automatic monitoring functions. It can provide an interrupt to the control system, or it
can be operated in a polled mode.
20.2 Features
I
Configurable multiplexer/demultiplexer for up to 28 DS1 signals, 21 E1 signals, or 7 DS2 signals to/from a DS3
signal.
I
M23 or C-bit parity mode operation.
I
Seven configurable independent M12 multiplexer/demultiplexers for up to 28 DS1 signals or 21 E1 signals
to/from 7 DS2 signals.
I
Provisionable time-slot selection for DS1, E1, and DS2 insertion or drop.
I
DS3 multiplexer capable of generating alarm indication signal (AIS), remote alarm indicator (RAI), idle, far-end
alarm and control (FEAC), and far-end block error (FEBE) signals.
I
Automatic DS3 receive monitor that detects loss of signal (LOS), bipolar violation (BPV), excessive zeros (EXZ),
out of frame (OOF), severely errored frame (SEF), AIS, RAI, FEAC codes, P-bit parity errors, C-bit parity errors,
and FEBE indications.
I
HDLC transmitter with 128-byte data buffer and HDLC receiver with 128-byte data FIFO for the C-bit parity path
maintenance data link.
I
DS3, DS2, DS1, and E1 loopback and loopback request generation.
I
Complies with T1.102, T1.107, T1.231, T1.403, T1.404, GR-499, G.747, and G.775.
20.2.1 M13 Applications
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M13 and M23 multiplexers.
I
M13 multiplexers supporting G.747 format.
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Independent M12 multiplexers.
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Digital access cross connects (DACS).
I
DS1/E1/DS2 broadcast.