參數(shù)資料
型號(hào): PEB80900H
英文描述: ?Network Termination Controller?
中文描述: ?網(wǎng)絡(luò)終端控制器?
文件頁(yè)數(shù): 66/181頁(yè)
文件大?。?/td> 3288K
代理商: PEB80900H
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PEB 80900
Part I
NTC-T
: Functional Description
Data Sheet
54
2001-04-02
3.4.4.2
Inputs to the S-Transceiver
The transition criteria used by the S-transceiver are described in the following sections.
They are grouped into:
C/I commands
Pin states
Events on the S/T-interface.
C/I Commands
AR
Activation Request. This command is used to start an exchange
initiated activation.
Activation request loop. The S-transceiver is requested to operate an
analog loop-back close to the S/T-interface.
Activation Indication. Confirms that the U-interface is fully transparent,
D-channel data transfer is allowed.
Activation Indication loop. Command to close the analog loop on the S-
interface.
Deactivation Confirmation. Transfers the S-transceiver into a
deactivated state in which it can be activated from a terminal (detection
of INFO 0 enabled).
Deactivation Request. Initiates a complete deactivation from the
exchange side by transmitting INFO 0. Unconditional command.
Reset of state machine. Transmission of Info 0. No reaction to incoming
infos. RES is an unconditional command.
Resynchronizing. The U-interface has not obtained or lost
synchronization. INFO 2 is transmitted consequently by the S-
transceiver.
Test Mode 1. Transmission of single pulses on the S/T-interface. The
pulses are transmitted with alternating polarity at a frequency of 2 kHz.
TM1 is an unconditional command.
Test Mode 2. Transmission of continuous pulses on the S/T-interface.
The pulses are sent with alternating polarity at a frequency of 96 kHz.
TM2 is an unconditional command.
ARL
AI
AIL
DC
DR
RES
RSY
TM1
TM2
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