PEF24901HV22XP Lantiq, PEF24901HV22XP Datasheet - Page 58

• Manufacturer Part Number: PEF24901HV22XP
• Manufacturer: Lantiq

Specifications of PEF24901HV22XP

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

3.5.11.1 State Machine Inputs
C/I-Commands
AR
AR1
AR2
AR4
DC
DR
DT
LTD
Data Sheet
Activation Request
The U-transceiver is requested to enter the power-up state and to start an
activation procedure by sending the wake-up signal U2W.
Activation Request Local Loop-back
The U-Transceiver is requested to operate an analog loop-back. An
activation procedure is started. Any other C/I-channel input defined in
Table 13
Activation Request Loop 2 in the NT
The U-Transceiver is requested to enter the power-up state and to start an
activation procedure by sending the wake-up signal U2W. The loop 2
request is signalled via the Maintenance channel by a continuous plus
polarity in the M-symbol. Any other C/I-channel input than AR2 (and AR4,
see below) resets the M-symbol to zero.
Activation Request Loop 4 in the Repeater
The U-Transceiver is requested to enter the power-up state and to start an
activation procedure by sending the wake-up signal U2W. The loop 4
request is signalled via the Maintenance channel by a series of alternating
plus and zero polarity in the M-symbol. Any other C/I-channel input than
AR4 (and AR2, see above) resets the M-symbol to zero.
Deactivation Confirmation
DC informs the U-transceiver that the upstream unit is also deactivated.
The U-transceiver is now ready to receive awake signals. Upon DC state
Deactivated is entered, where the U-transceiver allows to turn off the
clocks.
Deactivation Request
The U-transceiver is requested to start a deactivation procedure.
Data Through Test Mode
Unconditional command is used for test purposes only and forces the U-
transceiver to transit to the transparent state and to issue U4 independent
of the wake-up protocol. A far-end transceiver needs not to be connected.
In case a far-end transceiver is present it is assumed to be in the same
condition.
LT Disable
This unconditional command forces the U-transceiver to state Test, where
it transmits info U0. No further action is initiated.
causes the analog loop to be opened
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Functional Description
PEF 24901
2002-09-30
DFE-T