Specifications

Net-2000™ VCU Users Manual
Version 4.0, December, 2013
Interface Protocol
6.3.4.2 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
16 bit Word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Byte 2 Byte 3
Hex Value
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0x0000
Table 41 type Header Parameter
6.3.4.3 Reset Packet Bytes 4 & 5 (seq)
Bytes 4 and 5 hold the 16-bit sequence number (see Table 42). 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*
16 bit Word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Byte 4 Byte 5 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 42 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.
6.3.4.4 Reset Packet Bytes 6 & 7 (which)
The which element is used to indicate which vocoder state to reset. If bit zero is set the encoder state is reset. If bit
one is set the decoder state is reset. To reset both the encoder and decoder state set both bits zero and one.
which parameter
16 bit Word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Byte 6 Byte 7 Hex Value
Encoder Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0x0001
Decoder Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0x0002
Table 43 which Parameter
(Subject to Change) Page 55
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