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Data Pump Implementation Summary

Provided in the table below are comparative details, both in performance and in DSP resource usage, of the modem data pump code modules. Modem standards not mentioned can be implemented on request.

Title

Specification

Error Perf.

DSP Load Requirements2

Sample Rate

 

Max kb/s

Duplex Mode

10-6 Pe SNR (dB)1

MIPS

Data Mem (kwords)

Prog Mem (kwords)

(kHz)

R.38

0.2

Half

4.0

2.5

0.05

0.6

8.0/9.6

Bell 103

0.3

Full

5.0

3.9

0.06

0.6

8.0/9.6

Bell 202

1.8

Half

12.0(1.2kb/s)

3.2

0.05

0.5

8.0/9.6

V.17

14.4

Half

22.0

5.3

0.45

3.7

8.0/9.6

V.21

0.3

Full

5.0

3.9

0.06

0.6

8.0/9.6

V.22

2.4

Full

13.5

3.5

0.23

2.5

8.0/9.6

V.23

1.2

Half

12.5

3.3

0.05

0.5

8.0/9.6

V.26

2.4

Full(4w)/Half

8.5

1.5

0.15

1.6

8.0/9.6

V.27

4.8

Half

15.5

3.0

0.24

2.5

8.0/9.6

V.29

9.6

Full(4w)/Half

20.0

3.4

0.23

2.0

8.0/9.6

V.32

14.4

Full

22.0

7.8

3.13

6.04

8.0/9.6

V.33

14.4

Full(4w)

22.0

5.3

0.45

3.7

8.0/9.6

V.34: FD5,6

33.6

Full

34.0

20.3

7.93

12.5

8.0/9.6

V.34: HD5,6

33.6

Half

34.0

13.8

2.3

12.4

8.0/9.6
V.615

14.4

Full + SVD

26.0

15.0

6.4

6.1

8.0.9.6

DSP load figures given are for the'C54x/'C55x modules. Please consult individual data sheets for load details on the 'C2xx/'C5x modules.

1 SNR performances for flat channel

2 Individual modules contain common code so total program memory for all is 32.0kwords. All figures for 9.6kHz sample rate without backwards channel if applicable. Adjustments for 8.0kHz sample rate are: - for V.17/22/26/27/29/32/33 add 0.3MIPS, 0.02k data- & 0.2k prog-mem words - for Bell 103/R.38/V.21/V.23 scale MIPS figures by 5/6. For 75b/s Backwards Channel for V.23/26/27 at 9.6kHz sample rate add 3.0MIPS, 0.05 k data- & 0.4k prog-mem words. V.23 with backward channel at 8.0kHz sample rate takes: 6.8MIPS, 0.13k data- & 1.2k prog-mem words.

3 Covers round-trip delays of up to 1.25secs.

4 includes V.54 Remote Digital Loop

5 Same resource usage irrespective of sample rate and prog-mem

6 Includes V.8 - Prog Mem size for full- + half-duplex is 14.3kwords

Summary |R38 |Bell 103|Bell 202|V17|V21|V22|V23|V26|V27|V29|V32|V33|V34|V42||V61|