PEB24901HV12 Lantiq, PEB24901HV12 Datasheet - Page 51

• Manufacturer Part Number: PEB24901HV12
• Manufacturer: Lantiq

Specifications of PEB24901HV12

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Semiconductor Group
INFO U2
INFO U2A
INFO U1A
INFO U1
INFO U3
SI
INFO U4H
The LT (and LT-RP, if the NT-RP is synchronized) sends INFO U2 to
enable the own echo canceller to adapt the coefficients, and with the
Barker code the NT at the other end is enabled to synchronize. The M-
channel on Uk0 may be used to transfer loop commands. Recognizing
INFO U2 is used as a criterion for synchronization.
While the IEC NT-RP is synchronizing on the received signal, the IEC LT-
RP sends out INFO U2A to enable its echo canceller to adapt the
coefficients, but sending no Barker code it inhibits the NT (-TE, -PBX) to
synchronize on the still asynchronous signal. Due to proceeding
synchronization, the Uk0 frame may jump from time to time. INFO U2A
can not be detected in the IEC NT at the far end.
While the IEC (in all NT modes) is synchronizing on the received Signal, it
sends out INFO U1A to enable its echo canceller to adapt the
coefficients, but sending no Barker code it inhibits the LT (-RP) to
synchronize on the still asynchronous signal. Due to proceeding
synchronization, the Uk0 frame may jump from time to time. INFO U1A
can’t be detected in the IEC LT at the far end.
When synchronized, the IEC (in all NT modes) sends the Barker code
and the LT (-RP) may synchronize itself. INFO U1 indicates additionally
that a terminal equipment hasn’t yet activated. When receiving INFO U1,
the IEC indicates the synchronized state with RDS to layer 2. Usually
during activation, no INFO U1 is detected in the LT because the TE is
activated first and INFO U1 changes to INFO U3 before being detected.
The M-channel on Uk0 may be used to transfer code error indications
and 1 kbit/s transparent data.
When detecting INFO U3, the IEC LT in the exchange is allowed to
command the transition to the fully transparent state, because it indicates
that the whole link to the TE is synchronous in both directions. The M-
channel on Uk0 may be used to transfer code error indications and 1 kbit/
s transparent data.
The IEC sends periodically single pulses spaced 1 ms to the Uk0
interface to ensure that it is within the specified pulse mask.
With INFO U4H, each unit is commanded to go to the transparent state.
When detecting this, the IEC NT stops sending INFO U3 and indicates
This to the SBC or layer 2 device, ICC, via the IOM-2 interface. The M-
channel on Uk0 may be used to transfer loop commands and 1 kbit/s
transparent data.
50
PEB 24901
02.95