pef80913 Infineon Technologies Corporation, pef80913 Datasheet - Page 126
![no-image](/images/no-image-200.jpg)
pef80913
Manufacturer Part Number
pef80913
Description
2b1q Second Gen. Modular Isdn Nt
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF80913.pdf
(240 pages)
- Current page: 126 of 240
- Download datasheet (4Mb)
PEF 82912/82913
Functional Description
G1 Deactivated
The S-transceiver is not transmitting. There is no signal detected on the S/T-interface,
and no activation command is received in the C/I channel. Activation is possible from the
S/T interface and from the IOM -2 interface.
G1 I0 Detected
An INFO 0 is detected on the S/T-interface, translated to an “Activation Request”
indication in the C/I channel. The S-transceiver is waiting for an AR command, which
normally indicates that the transmission line upstream is synchronized.
G2 Pending Activation
As a result of the ARD command, an INFO 2 is sent on the S/T-interface. INFO 3 is not
yet received. In case of ARL command, loop 2 is closed.
G2 wait for AID
INFO 3 was received, INFO 2 continues to be transmitted while the S-transceiver waits
for a “switch-through” command AID from the device upstream.
G3 Activated
INFO 4 is sent on the S/T-interface as a result of the “switch through” command AID: the
B and D-channels are transparent. On the command AIL, loop 2 is closed.
G2 Lost Framing S/T
This state is reached when the transceiver has lost synchronism in the state G3
activated.
G3 Lost Framing U
On receiving an RSY command which usually indicates that synchronization has been
lost on the transmission line, the S-transceiver transmits INFO 2.
G4 Pending Deactivation
This state is triggered by a deactivation request DR, and is an unstable state. Indication
DI (state “G4 wait for DR”) is issued by the transceiver when:
either INFO0 is received for a duration of 16 ms
or an internal timer of 32 ms expires.
Data Sheet
112
2001-03-30
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