Net-2000™ Voice Codec Unit
User’s Manual
Page 45
Section 3 – Net-2000™ VCU Control
DVSI Confidential Proprietary
Reset Packet Parameters
Reset Packet Bytes 0 &1 (len)
The len parameter (bytes 0 and 1) hold the 16-bit length of the packet (Table 3). The packet length is
eight bytes.
len
=
Length (in bytes) of total packet (including header)
Byte 0
7 6 5 4 3 2 1 0
Byte 1
7 6 5 4 3 2 1 0
Decimal
Value
Reset Packet Size
0 0 0 0 0 0 0 0
0 0 0 0 1 0 0 0
8 bytes
Table 36 len header parameter
Reset Packet Bytes 2 & 3 (type)
The type parameter (bytes 2 and 3) is 16-bits packet type and is always 0x0000 for reset packets.
type
=
Packet type
Byte 2
7 6 5 4 3 2 1 0
Byte 3
7 6 5 4 3 2 1 0
Hex Value
Reset
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0x0000
Table 37 type header parameter
Reset Packet Bytes 4 & 5 (seq)
Bytes 4 and 5 hold the 16-bit sequence number (see Table 5). The sequence number is used as a
method to detect if and when data packets are dropped, so it is important to ensure that consecutive
sequence numbers are transmitted for channel data packets during operation.
Seq
=
Sequence number*
Byte 4
7 6 5 4 3 2 1 0
Byte 5
7 6 5 4 3 2 1 0
Decimal
Value
Minimum Value
1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
-32768
Maximum Value
0 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
32767
Table 38 seq header parameter
*Note:
Sequence numbers should be incremented by one every time a packet is
transmitted. When the sequence number reaches 32767, the next valid sequence
number is -32768.