Digital Voice Systems Net-2000, User Manual, Page: 58 / 68

Net-2000™ Voice Codec Unit
User’s Manual
Page 48
Section 3 – Net-2000™ VCU Control
DVSI Confidential Proprietary
Ack Packet Bytes 6 & 7 (cmd)
The
cmd
element is used to indicate the packet type being acknowledged. Since Reset packets are
the only packets acknowledged this value is always zero.
cmd parameter
Packet Type Ack’ed
Byte 6
7 6 5 4 3 2 1 0
Byte 7
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 44 cmd parameter
Response Packets
Channel Response Packet
The Net-2000™ VCU transmit encoder data in Channel response packets (Table 45 Channel
Response Packet).
Channel Response 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 1 1 0 0 0 0 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 0 0 0 0 0 0 0 0 1 1 0 0 0 x x x rate [0]
8 - 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 rate [1]
10 - 11 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 rate [2]
12 - 13 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 rate [3]
14 - 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 rate [4]
16 - 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 1 0 x x x x x x tone.idx
22 - 23 x 0 0 0 0 0 0 0 0 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
16 - 17 0 0 0 0 x x x x 0 0 0 x 0 0 x x format
18 - 19 x x x x x x x x x x x x x x x x channel [0-1]
20 - 21 x x x x x x x x x x x x x x x x channel [2-3]
22 - 23 x x x x x x x x x x x x x x x x channel [4-5]
… … … …
94 - 95 x x x x x x x x x x x x x x x x channel [78-79]
Table 45 Channel Response Packet
The cmode element of the packet should contain the status flags returned by the second invocation
of the encoder function ambe voice enc() as described in Table 46 cmode Bits for Channel Response
Packets. If the AMBE DTMF FRAME FLAG is set in the status flags output by the encoder, the
tone.idx and tone.amp elements should be set to the tone index and amplitude of the tone.
Otherwise, tone.idx should be set to AMBE INVALID TONE and tone.amp should be set to zero.