pef80913 Infineon Technologies Corporation, pef80913 Datasheet - Page 103
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pef80913
Manufacturer Part Number
pef80913
Description
2b1q Second Gen. Modular Isdn Nt
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF80913.pdf
(240 pages)
- Current page: 103 of 240
- Download datasheet (4Mb)
TIM
U-Interface Events:
ACT = 0/1
DEA = 0/1
UOA = 0/1
Timers
The start of timers is indicated by TxS, the expiry by TxE.
are used:
•
Table 23
Timer
T1
T7
T11
T12
T13
T14
T20
2.4.10.4 Outputs of the U-Transceiver:
The following signals and indications are issued on IOM
U-interface (predefined U-signals):
Data Sheet
Timing
The U-transceiver is requested to enter state ’IOM -2 Awaked’.
ACT-bit received from LT-side.
– ACT = 1 requests the U-transceiver to transmit transparently in both directions. In
– ACT = 0 indicates that layer-2 functionality is not available.
DEA-bit received from the LT-side
– DEA = 0 informs the U-transceiver that a deactivation procedure has been started
– DEA = 1 reflects the case when DEA = 0 was detected by faults due to e.g.
UOA-bit received from network side
– UOA = 0 informs the U-transceiver that only the U-interface is to be activated. The
– UOA = 1 requests the S/T-interface (if present) to activate.
Timers Used
the case of loop-backs, however, transparency in both directions of transmission is
established when the receiver is synchronized.
by the LT-side.
transmission errors and allows the U-transceiver to recover from this situation.
S/T-interface must be deactivated.
Duration
(ms)
15000
40
9
5500
15000
0.5
10
Function
Supervisor for start-up
Hold time
TN-transmission
Supervisor EC-converge
Frame synchronization
Hold time
Hold time
89
®
-2 (C/I-indications) and on the
Table 23
Functional Description
PEF 82912/82913
shows which timers
State
Receive reset
Alerting
EC-training
Pend. receive
reset
Pend. timing
Wait for SF
2001-03-30
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