MT92220 Zarlink Semiconductor, MT92220 Datasheet - Page 61

• Manufacturer Part Number: MT92220
• Description: 1023 Channel Voice Over IP/AAL2 Processor
• Manufacturer: Zarlink Semiconductor

Data Sheet
Identification key
dword 0-9
SIP
AIP
CF
ER
CP
NP
Flow Table Pointer
Match Packet Count
Match Byte Count
Next Post-Search
Confirmation
Structure Address
RX RTP Connection
Structure Base
Address
PRA
PRB
IP Address Index (in
Flow Table)
Field
The initial (pre-CRC) identification key of the packet should match these fields for the
packet to be declared valid with this post-search structure. Note that fields which are
masked out by the Profile Identification Mask should be set to 0s in this structure. The
format of the identification keys is indicated in Figure 27.
MPLS IP indicator.
“11” = reserved;
“10” = RTP/UDP payload;
“01” = IP,
“00” = no change.
MPOA IP indicator.
“11” = RTP/UDP payload,
“10” = IP,
“01” = MPLS unicast,
“00” = no change.
the one to which the packet was associated.
ELAN-ID Resolved Indication. When ‘0’, the ELAN-ID Resolved Indicator is left
unchanged. When ‘1’, the ELAN-ID Resolved Indicator is positively identified as
resolved.
Change Priority of packet. When ‘1’, the priority of the packet will be changed.
This field represents the logical subnet number on which the packet is received. This
value will replace the current Flow Table Pointer of the packet if the CF (Change Flow)
bit = ‘1’.
Number of packets that matched this post-search confirmation structure.
Number of bytes contained in all packets that matched this post-search confirmation
structure (based on Total Packet Length in packet handle).
If a packet hits this post-search structure and does not match, this pointer points to the
next structure that it can try to match with. This field is only used when more than 1
post-search confirmation structure is associated to the same binary tree node, meaning
that different headers produced the same CRC. 0000h means Null link.
If the packet matches this post-search confirmation structure and its Routing Destination
field includes the Disassembly module as a destination, this is the RTP Connection
Structure that will be used.
Priority Route A. If this bit is high, the priority of the packet determines if it will be sent to
TXA HP or TXA LP packet queue. When this bit is high, the RTD bits for TXA HP and
TXA LP are ignored.
Priority Route B. If this bit is high, the priority of the packet determines if it will be sent to
TXB HP or TXB LP packet queue. When this bit is high, the RTD bits for TXB HP and
TXB LP are ignored.
This index points to an entry within the Flow table that corresponds to the Destination IP
address of this packet. Note that the old Flow Table Pointer will be used to look-up the
IP Address Index, even if the Flow Table Pointer is changed by this structure.
Change Flow. When ‘1’, the Flow Table Pointer in this structure will be used to replace
new priority of packet (if it was changed). ‘0’ = LP; ‘1’ = HP.
Table 19 - Fields and Description
Zarlink Semiconductor Inc.
Description
MT92220
61