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| 型號(hào)： | PEB80900F |
| 英文描述： | ?Network Termination Controller? |
| 中文描述： | ？網(wǎng)絡(luò)終端控制器？ |
| 文件頁數(shù)： | 154/181頁 |
| 文件大小： | 3288K |
| 代理商： | PEB80900F |
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PEB 80900
Part II
’
IEC-T
’
: Operational Description
Data Sheet
142
2001-04-02
NT-RP synchronizing
The LT-RP waits for a command ARD from NT-RP indicating
that it is synchronized. The user data (B+B+D) on pin DOUT is
clamped to high (except repeater modes).
Entering this state, the NTC-T AM with IEC-T functionality
selected powers down within 0.5 ms stopping most parts of the
NTC-T AM, so that these CMOS circuits cannot consume further
energy. In the LT modes and NT-PABX modes the IOM
interface units remain active as long as they are clocked via
CLOCK pin, and the user data (B+B+D) on pin DOUT is
clamped to high (except repeater modes). In modes NT, NT-RP
and NT-TE, the NTC-T AM with IEC-T functionality selected
stops clocking the IOM
interface, if it has received four times
DIU in the C/I channel. In all NT modes pin DISS is set to high
to indicate to the power controller device that now less power is
consumed. If the IOM
interface clock is stopped, it can be
activated by the downstream unit by forcing line DU to low, when
an awake signal is recognized. The upstream unit activates
simply by restarting the lOM
clock, when a low on DIN or an
awake signal is recognized.
After being synchronized and indicating this with ARN/AR2, the
NTC-T AM with IEC-T functionality selected in NT mode waits
for the message AIU from the SBC which indicates that it is also
synchronized. The user data (B+B+D) on pin DOUT is clamped
to high (except repeater modes).
The NTC-T AM with IEC-T functionality selected has received
the awake signal and acknowledges this in this state. The user
data (B+B+D) on pin DOUT is clamped to high (except repeater
modes).
The NTC-T AM with IEC-T functionality selected in LT-RP mode
has recognized INFO U1 or U3, so 1152 subsequent bits have
been transferred without any bit error. This indicates
synchronization. Now the NTC-T AM with IEC-T functionality
selected itself is ready to go to the transparent state.
After successful awake procedure, the NTC-T AM with IEC-T
functionality selected tries to recognize INFO U1, U2 or U3
(mode dependent). The user data (B+B+D) on pin DOUT is
clamped to high (except LT-RP).
Receiving ARU or ARD In the C/I channel, the NTC-T AM with
IEC-T functionality selected has powered up and is sending the
awake signal. The user data (B+B+D) on pin DOUT is clamped
to high (except repeater modes).
Power down
SBC Synchronizing
Sending awake-ack.
Synchronized
Synchronizing
Start awaking Uk0
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