ZL30226/GA ZARLINK [Zarlink Semiconductor Inc], ZL30226/GA Datasheet - Page 32

• Manufacturer Part Number: ZL30226/GA
• Description: 4/8/16 Port IMA/TC PHY Device for xDSL
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

1.1.1
The software implemented transmit and receive LSMs are independent (i.e., each link has its own LSM). LSMs rely
on various events from: the ZL30226/7/8 interface, such as cell errors, excessive delay between-links, etc.; or, from
the T1/E1/J1/DSL framer, such as Loss Of Signal (LOS), Loss Of Frame (LOF), Remote Alarm Indication (RAI) etc.
On-chip registers are used to generate the ICP cells that communicate the LSM states at the Far End (FE).
1.1.2
The IMA GSMs and Group Traffic State Machines (GTSM) must be implemented in software. One of each state
machine should be implemented for each IMA Group.
On-chip registers are used to generate the ICP cells that communicate the various states to the FE.
1.1.3
The addition, removal or restoration of a link is controlled by software using the various control registers in the
ZL30226/7/8 and in the xDSL framers. Decisions are based on the ZL30226/7/8 and typically xDSL framer status
registers.
1.1.4
The ZL30226/7/8 provides numerous registers and counters to implement a polling and/or interrupt mechanism for
tracking link and IMA Group status. This traffic in and out information is used by the Management Information Base
(MIB) for each IMA Group.
1.1.5
The microprocessor controls the operation of the serial links by providing handshaking between the Far End (FE)
and Near End (NE) including such functions as signaling and loopback controls. Rate adjustment is controlled by:
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1.1.6
Software implements most of the performance monitoring. The ZL30226/7/8 provides status information for:
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It also provides the content for received ICP cells that contain some changes. The external xDSL framers provide
the low level status of the link. The software integrates and responds to the various events.
the Cell Delineation Block and IMA Frame State Machine
the number of ICP violations
the total number of cells
the total number of User cells
the number of idle or discarded cells.
adding or removing one or more serial links
providing feedback to the ATM network for adjusting the ATM traffic.
Link State Machines
IMA Group State Machines
Link Addition, Removal or Restoration
Interrupts
Signalling and Rate Adjustment
Performance Monitoring
Zarlink Semiconductor Inc.
ZL30226/7/8
32
Data Sheet