Net-2000™ Voice Codec Unit
User’s Manual
Page 46
Section 3 – Net-2000™ VCU Control
DVSI Confidential Proprietary
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
Reset Flags
Byte 6
7 6 5 4 3 2 1 0
Byte 7
7 6 5 4 3 2 1 0
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 39 which parameter
Ack Packet
The Ack packet is used to acknowledge the Reset packet when the VCU is in File Mode.
Ack Packet
Bytes
(msb-lsb)
Bit
7 6 5 4 3 2 1 0
Bit
7 6 5 4 3 2 1 0
Parameter Name
0 – 1
0 0 0 0 0 0 0 0
0 0 0 0 1 0 0 0
len
2 – 3
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
type
Header
4 – 5
x x x x x x x x
x x x x x x x x
seq
6 – 7
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
cmd
Table 40 Ack Packet
Ack packets have the following format described Table 18 and C-language data structure below:
struct ack_packet_t {
short len;
short type;
short seq;
short cmd;
};
The size of the Ack packet is eight bytes. The elements of the Ack packet are described in detail in
the following sections.