Specifications

Net-2000™ VCU Users Manual
Version 4.0, December, 2013
Interface Protocol
6.3.3.2 Voice Response Packet
The VCU transmits a Voice Response Packet to a PC in File Mode after decoding a received Decode Command
Packet.
6.3.3.3 Voice Data Packet Format
Voice Packet
16 bit Word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bytes
Byte (n) Byte (n+1)
Parameter Name
0 - 1 0 0 0 0 0 0 0 0 1 1 0 1 1 0 1 0 len
2 - 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 type
Header
4 - 5 x x x x x x x x x x x x x x x x seq
6 - 7 x x x x x x x x x x x x x x x x rate [0]
8 - 9 x x x x x x x x x x x x x x x x rate [1]
10 - 11 x x x x x x x x x x x x x x x x rate [2]
12 - 13 x x x x x x x x x x x x x x x x rate [3]
14 - 15 x x x x x x x x x x x x x x x x rate [4]
16 - 17 x x x x x x x x 1 1 0 0 x x x x rate [5]
18 - 19 0 x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 cmode
20 - 21 0 0 0 0 0 0 0 0 x x x x x x x x tone.idx
22 - 23 x x x x x x x x x x x x x x x x tone.amp
24 - 25 0 0 0 0 0 0 0 0 1 0 x x x x x x ws
26 - 27 0 0 0 0 x x x x 0 0 0 x 0 0 x x format
28 - 29 x x x x x x x x x x x x x x x x voice [0]
30 - 31 x x x x x x x x x x x x x x x x voice[1]
32 - 33 x x x x x x x x x x x x x x x x voice [2]
… … … …
346 – 350 x x x x x x x x x x x x x x x x voice[ws-1]
Table 30 Voice Data Packet
Voice Data Packets have the following format described Table 30 Voice Data Packet and C-language data structure
bel
ow:
struct voice_packet_t {
short len;
short type;
short seq;
short rate[5];
short cmode;
short tone[2];
short ws;
short format;
short voice[160];
};
The size of the Voice Data Packet can vary depending on the number of samples in the voice[] buffer.
The actual number of elements in the voice[] buffer can vary between 159 and 161. The nominal
number of samples is 160. The ws and len elements of the Voice Data Packet should be adjusted to
(Subject to Change) Page 50
DVSI CONFIDENTIAL PROPRIETARY