PEF24901HV22XT Lantiq, PEF24901HV22XT Datasheet - Page 34

• Manufacturer Part Number: PEF24901HV22XT
• Manufacturer: Lantiq

Specifications of PEF24901HV22XT

• Control Interface: HDLC
• Lead Free Status / Rohs Status: Compliant

Figure 9
3.2.2
The Command/Indication (C/I) channel carries real-time control and status information
between the DFE-T V2.2 and a layer-1 control device. A new C/I code must be detected
in six consecutive IOM
RES, SSP, DT and commands in the states “Test” and “Reset”) must be applied up to 2
ms before they are recognized. An indication is issued permanently by the DFE-T V2.2
on DOUT until a new indication needs to be forwarded.
The C/I code is 4-bit wide and located at bit positions 27–30 in each time-slot. A listing
and explanation of the U-transceiver C/I codes can be found on page 3-54.
3.2.3
The Monitor channel represents a second method of initiating and reading U-transceiver
specific information. Features of the monitor channel are supplementary to the
command/indicate channel. Unlike the command/indicate channel with an emphasis on
status control, the monitor channel provides access to internal bits (maintenance,
overhead) and test functions (local loop-backs, block error counter etc.).
Besides the known MON-8 commands the new MON-12 commands are introduced in
the DFE-T V2.2:
Data Sheet
IOM
IOM
Multiplexed Frame Structure of the IOM
®
®
-2 Command/ Indicate Channel
-2 Monitor Channel
®
-2 frames to be considered valid, unconditional commands (i.e.
35
®
-2 Interface
Functional Description
PEF 24901
2002-09-30
DFE-T