MT92220BG Zarlink Semiconductor, MT92220BG Datasheet - Page 80

• Manufacturer Part Number: MT92220BG
• Description: Description = 1023 Channel Voice Over IP/AAL2 Processor ;; Package Type = Epbga ;; No. Of Pins = 608
• Manufacturer: Zarlink Semiconductor

80
TX RTP Header Structure
Pointer
SI
Time Stamp Offset
Transmitted Packet Count
Sequence Number
Transmitted Octet Count
Word of Last RTP Packet
Sent
Note
Field
Pointer to TX Header assembly structure. This pointer points to increments of 32
bytes. All packet headers are formed based on the TX Header assembly structure.
If changes in the headers must be made dynamically during a connection, this
field may be rewritten atomically by software in order to point to another TX
Header Structure.
Sequence Number Insert. When ‘0’, the Sequence number is taken directly from
the HDLC / TXCPU packet. When ‘1’, the sequence number is always inserted by
this structure and the one in the original packet is ignored. This field must always
be set if an xxPCM channel addition is opened over of this connection structure.
This number is added to the RTP time stamp of xxPCM / HDLC / TXCPU packets
as they are sent. It is used to randomize the starting point of the RTP time stamp.
Free-running counter of all packets transmitted on this connection.
Sequence Number that will be sent in the next RTP packet if the SI bit is set. This
field should be initialized to a random value by software.
A Free-running counter of the total number of transmitted bytes in all packets
including all header bytes.
Record of first 6 words of last transmitted RTP payload. These fields can be used
to monitor what is being sent on this connection.
This structure must begin on a 64-byte boundary.
Table 33 - Fields and Description
Zarlink Semiconductor Inc.
Description