PEB2096HV31XT Lantiq, PEB2096HV31XT Datasheet - Page 44

• Manufacturer Part Number: PEB2096HV31XT
• Manufacturer: Lantiq

Specifications of PEB2096HV31XT

• Control Interface: HDLC
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Data Sheet
Pending Activation
This state results from a request for activation of the line, either from the terminal
(INFO 1w) or from the layer-2 device (AR, AR2 or ARL). INFO 2 is then transmitted and
the OCTAT-P waits for the responding INFO 1 from the remote device.
Synchronized
Upon receipt of INFO 1 the OCTAT-P must synchronize itself to the signal. This process
takes at most 10 ms.
Activated
INFO 1 has a code violation in the framing bit (F bit) with respect to the last received bit
whereas INFO 3 has none. Upon the receipt of 2 frames without a code violation in the
F bit, the OCTAT-P enters the activated state and outputs INFO 4. The line is now
activated; the OCTAT-P sends INFO 4 to the remote, the remote sends INFO 3 to the
OCTAT-P.
Resynchronization
If the OCTAT-P fails to recognize INFO 3, for whatever reason, it will attempt to
resynchronize. Entering this state it will output INFO 2. This is similar to the original
synchronization procedure in the pending activation state (the indication given to layer 2
is different). However as before, recognition of INFO 1 leads to the synchronized state.
OCTAT-P state diagram is shown in Figure 3-8.
3.10.2
Signals controlling and indicating the internal state of all U
are called INFOs. Four different INFOs (INFO 0, 1W, 1/2 and 3/4) can be sent over the
U
Activation, Test Mode, Deactivated, Reset,...) of the connected transceivers (e.g.
OCTAT-P and ISAC-P TE). When the line is deactivated INFO 0 is exchanged by the
U
line; in either direction.
When the line is activated INFO 3 (in upstream direction) and INFO 4 (in downstream
direction) are continually sent. INFO 3 and 4 contain the transmitted data (B1, B2, D, M).
PN
PN
transceivers at either end of the line. Info 0 indicates that there is no signal on the
interface depending on the actual state (Synchronized, Activated, Pending
Info Structure on the U
PN
Interface
3-16
PN
transceiver state machines
Operational Description
PEB 2096
04.99