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ATN 950B Multi-service Access Equipment
Hardware Description
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Service Processing Module
This module performs the following functions:
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Management Module
This module manages and controls each module on the board.
Clock Module
This module performs the following functions:
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Power Supply Module
This module converts the input DC voltage into various DC voltages required by each module
on the board.
5.7.4 Front Panel
On the front panel of the AND3ML1A/AND3ML1B, there are indicators and interfaces.
Appearances of the Front Panel
Figure 5-15
Figure 5-15 Front panels of the AND3ML1A/AND3ML1B
Issue 03 (2012-07-23)
This module recovers the line clock.
In the receive direction, this module receives the signals from the service access module
and performs E1 framing. This module also identifies protocol types of the service signals,
processes the service signals based on the IMA/ATM, CES, and ML-PPP protocols (for
example, addition and deletion of IMA group members, VP/VC switching and
concatenation of ATM cells, vacant slot compression of CES services, and setup of ML-
PPP groups). Then, this module performs PWE3 encapsulation and PW scheduling, Finally,
this module converts the processed signals to high-rate signals, and then sends the signals
to the AND1CXPA/AND1CXPB through the backplane-side interfaces.
In the transmit direction, this module receives the high-rate signals from the AND1CXPA/
AND1CXPB through the backplane-side interfaces and recovers low-rate service signals.
Then, this module performs PWE3 decapsulation, identifies different protocols and
processes the service signals, and completes E1 framing. Finally, this module sends the
processed signals to the service access module.
When used with the AND1CXPA/AND1CXPB, processes the recovered line clock.
Provides the working clock for each module on the board.
shows the appearances of the front panel of the AND3ML1A/AND3ML1B.
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5 Physical Interface Card
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