PEF24911HV22XP Lantiq, PEF24911HV22XP Datasheet - Page 122

• Manufacturer Part Number: PEF24911HV22XP
• Manufacturer: Lantiq

Specifications of PEF24911HV22XP

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

Table 15
5.2
MON-2 indications are used to transfer all overhead bits except those representing EOC-
and CRC-bits. Starting with the ACT-bit, the order is identical to the position of the bits
on the U-interface.
The first MON-2 message is issued immediately after reaching the ’Line Active’ state in
LT-mode. Thereby the control system is informed about the initial U-interface status after
a successful activation.
Later on MON-2 messages will only be sent if the system status has been changed. No
MON-2 messages are issued while CRC-violations are detected (default setting). This
prevents the system of being overloaded by faulty monitor indications. Alternative
validation modes besides CRC are provided by the MFILT register which can be
accessed via the MON-12 protocol (see
MON-2 monitor messages have the second highest priority after MON-0 commands. Via
the MON-8 command “PACE” bit D1, SAI/UOA, can be controlled by a MON-2
command. By use of register M4WMASK the user can also gain control on all other
overhead bits via MON-2 commands (see again
Latching
MON-2 data that is received from IOM
received from U is just forwarded on IOM
MON-2 Structure
D0 … 11: Overhead bits
Data Sheet
Hex-
code
i1-i8
FF
XX
MON-2
0 0 1 0
LT
D
RTN
MON-2 - Exchanging Overhead Bits
MON-0 Functions (cont’d)
U
ACK
1. Byte
Function
Return to normal
With this command all previously sent EOC-commands will be released.
The EOC-processor is reset to its initial state (FF
Acknowledge
If a defined and correctly addressed EOC-command was received by
the NT, the NT replies by echoing back the received command.
D11 D10 D9 D8
Overhead Bits
®
Chapter 3.2.5
®
is latched and transmitted on U. MON-2 data
112
and is not latched.
Chapter 3.8.2
D7 D6 D5 D4 D3 D2 D1 D0
for the details).
Overhead Bits
2. Byte
for the details).
Monitor Commands
H
).
PEF 24911
2001-07-16