AlgoTron DSP
Software for Telecoms & Audio
a TI DSP Third Party Network
Member
Home
Modems
Telephony
Audio
Utilities
Consultancy
Glossary
Index
Contact
us
Modem Data Pump DSP Software
The following telephone line modem data pumps are implemented. Click on "asm code"# or "C code" of the desired modem to view a data sheet (# shorthand for TMS320C5000 DSP assembler code).
| Modem | Code type (click for data sheet) | Processor MIPS1 | Processor Data Mem (kwords)1 | Processor Prog Mem1 | Max kb/s | Duplex mode | SNR for 10-6 BER (dBs)2 |
| Bell 103 | asm code | 3.1 | 0.06 | 0.6kwords | 0.3 | Full | 5.0 |
| C code | 4.5 | 0.04 | 1.5kbytes | ||||
| Bell 202 | asm code | 2.4 | 0.05 | 0.5kwords | 1.8 | Full(4wire) /Half |
12.0(1.2kb/s) |
| C code | 4.5 | 0.04 | 1.4kbytes | ||||
| Bell 212(A) | asm code | 3.6 | 0.24 | 3.0kwords3 | 1.2 | Full | 6.5(1.2kb/s) |
| C code | 5.5 | 0.22 | 10.1kbytes3 | ||||
| R.3X(R.38etc) | asm code | 2.0 | 0.05 | 0.6kwords | 0.2 | Full | 4.0 |
| C code | 4.2 | 0.04 | 1.8kbytes | ||||
| V.8 | asm code | 4.6 | 0.13 | 1.1kwords4 | 0.3 | Full | 5.0 |
| C code | 6.4 | 0.11 | 3.4kbytes4 | ||||
| V.17 | asm code | 5.3 | 0.47 | 3.8kwords | 14.4 | Half | 22.0 |
| C code | 12.8 | 0.43 | 12.0kbytes | ||||
| V.21 | asm code | 3.1 | 0.06 | 0.6kwords | 0.3 | Full | 5.0 |
| C code | 4.5 | 0.04 | 1.5kbytes | ||||
| V.22bis(V.22) | asm code | 3.5 | 0.24 | 2.6kwords5 | 2.4 | Full | 13.5 |
| C code | 5.7 | 0.22 | 9.6kbytes5 | ||||
| V.23 | asm code | 2.5 | 0.05 | 0.5kwords | 1.2 | Full | 12.5 |
| C code | 4.5 | 0.04 | 1.5kbytes | ||||
| Modem | Code type | Processor MIPS1 | Processor Data Mem (kwords)1 | Processor Prog Mem1 | Max kb/s | Duplex mode | SNR for 10-6 BER (dBs)2 |
| V.25 | asm code | 1.7 | 0.05 | 0.3kwords | n/a | n/a | n/a |
| C code | 2.8 | 0.02 | 0.9kbytes | ||||
| V.26bis | asm code | 1.8 | 0.17 | 1.7kwords | 2.4 |
Full(4wire) |
8.5 |
| C code | 4.0 | 0.15 | 5.3kbytes | ||||
| V.27bis/ter | asm code | 3.2 | 0.26 | 2.5kwords | 4.8 | Full(4wire) /Half |
15.5 |
| C code | 6.8 | 0.24 | 8.4kbytes | ||||
| V.29 | asm code | 3.7 | 0.25 | 2.1kwords | 9.6 | Full(4wire) /Half |
20.0 |
| C code | 7.2 | 0.24 | 7.2kbytes | ||||
| V.32bis(V.32) | asm code | 7.9 | 3.16 | 5.8kwords5 | 14.4 | Full | 22.0 |
| C code | 17.4 | 3.16 | 20.5kbytes5 | ||||
| V.33 | asm code | 5.3 | 0.47 | 3.8kwords | 14.4 | Full(4wire) |
22.0 |
| C code | 12.9 | 0.43 | 11.6kbytes | ||||
| V.34 | asm code | 19.9 | 7.96 | 12.0kwords7 | 33.6 | Full/Half | 34.0 |
| C code | 38.9 | 7.96 | 40.8kbytes7 | ||||
| V.428 | asm code | 2.5 | 1.2 | 1.5kwords | any | Full | n/a |
| C code | 4.8 | 1.2 | 4.9kbytes | ||||
| V.61 | asm code | 14.9 | 6.46 | 6.0kwords | 14.49 | Full | 26.0 |
| C code | 33.5 | 6.36 | 23.1kbytes |
1
with C code, MIPS and ProgMem (in 8-bit bytes) values are from
TMS320C55x DSP compiling
1
all figures for 8.0kHz sample rate without backwards channel if applicable
2
SNR figures for flat channel with 4.0kHz bandwidth noise
3
includes
V.22 and Bell 103 code
4
includes V.21 code
5
includes (V.54) Remote Digital Loop
6
covers round-trip delays of up to 1.3secs
7
full-duplex only but including V.8
8
HDLC error correction - figures for 33.6kb/s full-duplex data
with REJ-only frame rejection
9
includes an audio + 4.8kb/s data mode
