Performance Measurements

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Performance Measurements

This page presents performance measurements for modem and telephony components in the presence of various channel impairments. These measurements were taken from both VSIM simulations and on real-time hardware using the Telecom Analysis Systems TAS-122 Telephone Network Simulator.

[Caller ID][Call Progress][DTMF/MF][Dynamic Range][V.42][V.42bis][Wireless BER]

Telecom Modem Composite BER Curves

Notes:

Test: Measure Bit Error Ratio in white Gaussian noise, and plot the curves.
Power Level: Nominal (-16 dB)
Duration: 1e8 bits or 1e4 errors at each SNR level, which ever comes first
Impairment: Additive white Gaussian noise, flat from DC to 4 kHz
Channel characteristics: Flat from DC to 4 kHz.
Method: The fax modems (v.17, v.27, v.29) were run using Vsim -BER measurement mode with -L1e8 bits max and -E1e4 errors max per SNR level. The v32bis was run independently at each SNR level to simulate a retrain for each point on the curve.

FAX Modem BER Curves in Gain Distortion and Noise

Notes:

Test: Measure Bit Error Ratio in white Gaussian noise plus gain distortion, and plot the curves.
Power Level: Nominal (-16 dB)
Duration: 1e8 bits or 1e4 errors at each SNR level, which ever comes first
Noise Impairment: Additive white Gaussian noise, flat from DC to 4 kHz
Channel characteristics: CONUS Poor Voice gain Distortion.
Method: The fax modems (v.17, v.27, v.29) were run using Vsim -BER measurement mode with -L1e8 bits max and -E1e4 errors max per SNR level. The v32bis was run independently at each SNR level to simulate a retrain for each point on the curve.

Telecom Modem Acquisition, Dynamic Range, and Carrier Offset

Modem	Burst Acquisition (%)	Dynamic Range Min/Max (dB)	Carrier Frequency Offset (Hz)
Baudot TTY	100	-42 to -3	-15 to +30
Bell103	100	-47 to -3	-40 to +50
Bell202	100	-47 to -3	-40 to +50
Bell212	100	-47 to -10	-10 to +10
V.17	100	-47 to -8	-40 to +40
V.21	100	-48 to -4	-19 to +12
v.22bis	100	-47 to -10	-10 to +10
V.23	100	-48 to -6	-19 to +16
v.26	100	-48 to -5	-10 to +40
v.27	100	-47 to -5	-10 to +40
v.29	100	-48 to -8	-10 to +40
v.32bis/v.32	100	-47 to -10	-10 to +40

Notes:

Burst Acquisition is defined as the ratio of bursts successfully demodulated to bursts transmitted and is presented as a percentage. This test was run using Vsim with the -ACQ -L1e3 command line parameters to generate randomly phased bursts of 1e3 bits duration at nominal (-16 dB) power, and each test was run over 1000 bursts.
Dynamic Range is defined here as the minimum and maximum power levels at which the modem successfully demodulates a burst without error. The modems receive signal threshold level was set to the default -48 dB, and the echo return loss in the hybrid simulation was set for 20 dB. The maximum power levels are defined as the level where the signal clips - that is, the peak signal level exceeds 16 bit signed integer values (+32767/-32768).
Carrier Frequency Offset is defined the deviation from the specified modulation carrier frequency and is reported in Hz.

Fax and Data Modem Brand Interoperability

Representative Sample of Fax Machines Tested

Audiovox AFX 3500
Brother Intelifax 680
Brother MFC 1750
Fujitsu DEX Express 6000
Fujitsu DEX X530
Genoa Fax Analyzer
Gray Associates Fax Analyzer
HP FAX-200
Lanier Faxwriter 2400 Mitafax LDC-650
Murata M1200
Muratec M910
NEC NECFAX 340
NEC NECFAX 461
NEC NECFAX 480
OKI Fax 650
Panasonic KX-F130
Richo Fax15 Samsung FX1700
Sanyo Sanfax 80
SHARP FO-135
Sharp UX-116
Toshiba
Xerox Telecopier 7018

Representative Sample of Data Modems Tested

3Com Etherlink LAN+28.0 Modem
Atlas 33.6EFX
AT&T Paradyne Comsphere 3810
Blaster 56k
Boca MV.34ED
Bytecom Contac
Cardinal MB2400
Cardinal v.34
ELSA AG MicroLink56k
GVC 28.8
Hayes Optima 96
Hayes Smartmodem 1200
Hayes Accura 144+Fax144
Hayes Accura 336/56KMulti-tech
Intel Satisfaction 14.4
Kingston PCMCIA
Megahertz 14.4 PCMCIA
Microcom Deskporte 288.8S
Microcom Deskporte 488S
Microcom Deskporte Fast MNP10
Microcom Deskporte Fast QX-4232
Motorola ModemSurfr
Motorola ModemSurfr 33.6
Motorola UDS
Modem Blaster Flash 56k
Multimodem 19.2
Practical Peripherals PM144MT II
Practical Peripherals PM288 MPSI
Supra Express 56k
Supra Diamond 56k
TDK Cyberexpress 3000
USR Sportster 14,400
USR Sportster 28,800
USR Sportster 33,600 Faxmodem
USR Sportster v.90 Faxmodem
Xircom RealPort Modem 56k
Zoom Faxmodem 56kx
Zoom VFX28.8

Notes:

Fax machine tests conducted at various customer sites. and with MESi fax modems used as data pumps in customer fax and fax relay systems. The test criteria for fax interoperability is that the MESi fax modems can connect and transfer pages with these machines.

Data modem tests conducted at MESi, MESi sub-contractors, and customer's sites. The test criteria for data modem interoperability is that the MESi modem can connect and exchange data without error control and including retrains, rate changes, and rate renegotiations.

This interoperability list is limited to only devices that have been physically tested or witnessed by MESi personnel, and is in no way an exhaustive list.

GenDet Call Progress Detector Performance

Parameter Time - Cadence-Based (default) Time - North American

Tone Detect time 92 msec. 52 msec.

Resolve DIALTONE time 2.0 sec. 52 msec.

DIALTONE release time 0.4 sec. 52 msec.

Resolve RINGBACK time 2.8 sec. 52 msec.

RINGBACK release time 0.8 sec. 52 msec.

Resolve BUSY time 2.4 sec. 52 msec.

BUSY release time 0.8 sec. 52 msec.

Resolve REORDER time 2.6 sec. 52 msec.

REORDER release time 0.8 sec. 52 msec.

Parameter Cadence-Based (default) North American

Tone Detect frequency range 250 Hz to 750 Hz 350 Hz to 620 Hz

Tone Detect dynamic range -6 dBm to -43 dBm -6 dBm to -43 dBm

Network Tones Tested for Various Countries

Country

Dial Tone

Ring-back

Busy

Congestion

Australia

400 Hz + 450 Hz continuous

425 Hz,

0.4s ON, 0.2s OFF, then 0.4s ON, 2.0s OFF

425 Hz, 0.375s ON, 0.375s OFF

425 Hz, 0.375s ON, 0.375s OFF

Austria

400 Hz to 490 Hz continuous

400 Hz to 490 Hz, 1.0s ON, 5.0s OFF

400 Hz to 490 Hz, 0.3s ON, 0.3s OFF

400 Hz to 490 Hz, 0.2s ON, 0.2s OFF

Belgium

450 Hz continuous

450 Hz,

1.0s ON, 3.0s OFF

450 Hz, 0.5s ON, 0.5s OFF

450 Hz, 0.167s ON, 0.167s OFF

Brazil

425 Hz continuous

425 Hz,

1.0s ON, 4.0s OFF

425 Hz, 0.25s ON, 0.25s OFF

425 Hz, 0.25s ON, 1.0s OFF

Britain

400 Hz + 450 Hz continuous

400 Hz + 450 Hz,

0.35s ON, 0.22s OFF, then 0.4s ON, 0.2s OFF, 0.4s ON, 2.0s OFF

400 Hz, 0.375s ON, 0.375s OFF

400 Hz, 0.35s ON, 0.225s OFF

Canada

350 Hz + 440 Hz continuous

440 Hz + 480 Hz,

2.0s ON, 4.0s OFF

480 Hz + 620 Hz, 0.5s ON, 0.5s OFF

480 Hz + 620 Hz, 0.25s ON, 0.25s OFF

Czech. Republic

370 Hz to 500 Hz continuous

370 Hz to 500 Hz,

1.0s ON, 4.0s OFF

425 Hz, 0.33s ON, 0.33s OFF

425 Hz, 0.16s ON, 0.16s OFF

Denmark

425 Hz continuous

425 Hz, 0.25s ON, 0.25s OFF

425 Hz, 0.25s ON, 0.25s OFF

Finland

425 Hz continuous

425 Hz, 0.3s ON, 0.3s OFF

425 Hz, 0.2s ON, 0.2s OFF

France

440 Hz continuous

440 Hz,

1.5s ON, 3.5s OFF

440 Hz, 0.5s ON, 0.5s OFF

440 Hz, 0.5s ON, 0.5s OFF

Germany

425 Hz continuous

425 Hz,

1.0s ON, 4.0s OFF

425 Hz, 0.48s ON, 0.48s OFF

425 Hz, 0.24s ON, 0.24s OFF

Greece

450 Hz continuous

450 Hz, 0.3s ON, 0.3s OFF

450 Hz, 0.3s ON, 0.3s OFF

Hungary

425 Hz continuous

425 Hz, 0.3s ON, 0.3s OFF

425 Hz, 0.3s ON, 0.3s OFF

Iceland

400 Hz to 450 Hz continuous

425 Hz, 0.25s ON, 0.25s OFF

425 Hz, 0.25s ON, 0.25s OFF

Ireland

400 Hz + 450 Hz continuous

400 Hz + 450 Hz,

2.0s ON, 4.0s OFF

400 Hz + 450 Hz, 0.375s ON, 0.375s OFF

400 Hz + 450 Hz, 0.375s ON, 0.375s OFF

Italy

425 Hz continuous
0.2s ON, 0.2s OFF,
0.6s ON, 1.0s OFF repeated

425 Hz,

1.0s ON, 4.0s OFF

425 Hz, 0.5s ON, 0.5s OFF

425 Hz, 0.5s ON, 0.5s OFF

Japan

400 Hz continuous

384 Hz + 416 Hz, 1.0s ON, 2.0s OFF

400 Hz,

0.5s ON, 0.5s OFF

400 Hz,

0.5s ON, 0.5s OFF

Luxembourg

380 Hz to 490 Hz continuous

380 Hz to 490 Hz, 0.5s ON, 0.5s OFF

380 Hz to 490 Hz, 0.5s ON, 0.5s OFF

Mexico

425 Hz continuous

425 Hz, 1.0s ON, 4.0s OFF

425 Hz, 0.25s ON, 0.25s OFF

425 Hz, 0.25s ON, 0.25s OFF

Norway

425 Hz continuous

425 Hz, 1.0s ON, 4.0s OFF

425 Hz, 0.5s ON, 0.5s OFF

425 Hz, 0.2s ON, 0.2s OFF

Poland

360 Hz to 450 Hz continuous

360 Hz to 450 Hz, 0.5s ON, 0.5s OFF

Portugal

425 Hz continuous

425 Hz, 1.0s ON, 5.0s OFF

425 Hz, 0.5s ON, 0.5s OFF

425 Hz, 0.2s ON, 0.2s OFF

Spain

425 Hz continuous

425 Hz, 1.5s ON, 3.0s OFF

425 Hz, 0.2s ON, 0.2s OFF

425 Hz, 0.2s ON, 0.2s OFF

Sweden

425 Hz continuous

425 Hz, 1.0s ON, 5.0s OFF

425 Hz, 0.25s ON, 0.25s OFF

425 Hz, 0.25s ON, 0.75s OFF

Turkey

450 Hz continuous

450 Hz,

2.0s ON, 4.0s OFF

450 Hz, 0.5s ON, 0.5s OFF

450 Hz, 0.2s ON, 0.2s OFF

USA

350 Hz + 440 Hz continuous

440 Hz + 480 Hz,

2.0s ON, 4.0s OFF

480 Hz + 620 Hz,

0.5s ON, 0.5s OFF

480 Hz + 620 Hz,

0.25s ON, 0.25s OFF

Notes:

Test: Run VSIM with Number of samples per frane set to one and examine the "states.dat" output log for various signals. For example, "ring-back" is run as:
VSIM -NUM1 -vringback

Cadence-based detector initially reports RX_CALL_PROGRESS_ID when any tone or tones are detected within 350 Hz to 650 Hz, and essentially all of the signal energy is within this band. The actual call progress signal type is resolved as shown in the table above, after the detection of the tone presence.

There are two build-time options for Call Progress: Cadence-based and North American. Cadence-based searches for tone(s) within a 250 Hz to 750 Hz range and reports Busy and Congestion as BUSY. North American call progress determines the signal type based on dual-tone analysis. BUSY will initially be identified as REORDER, and will switch to BUSY if the signal has been ON for greater than 0.5 sec.

The minimum signal level detected is determined by Rx->threshold, which defaults to -47 dB.

Bellcore/ETSI Caller ID Detector Performance

Table 2 - Group 1, CAS Recognition - All Parameters at Nominal Values

Test
# Low
Freq.
Tone
HZ Low
Freq.
Tone
Level
dBm High
Freq.
Tone
Hz High
Freq.
Tone
Level
dBm Twist
Level
dB CAS
Duration
ms Test
Result
per 100 bursts

1 2130 -22 2750 -22 0 80 100%

Table 3 - Group 2, CAS Recognition - One Parameter at a Time at the Extreme Value

Test
# Low
Freq.
Tone
HZ Low
Freq.
Tone
Level
dBm High
Freq.
Tone
Hz High
Freq.
Tone
Level
dBm Twist
Level
dB CAS
Duration
ms Test
Result
per 100 bursts

2 2119.3 -22 2750 -22 0 80 100%

3 2140.7 -22 2750 -22 0 80 100%

4 2130 -22 2736.2 -22 0 80 100%

5 2130 -22 2763.8 -22 0 80 100%

6 2130 -32 2750 -32 0 80 100%

7 2130 -14 2750 -14 0 80 100%

8 2130 -32 2750 -26 0 80 100%

9 2130 -26 2750 -32 0 80 100%

10 2130 -14 2750 -20 0 80 100%

11 2130 -20 2750 -14 0 80 100%

12 2130 -22 2750 -22 0 75 100%

13 2130 -22 2750 -22 0 80 100%

Table 4 - Group 3, CAS Recognition - Parameters at 90% from Nominal, CAS 75.5 ms

Test
# Low
Freq.
Tone
HZ Low
Freq.
Tone
Level
dBm High
Freq.
Tone
Hz High
Freq.
Tone
Level
dBm Twist
Level
dB CAS
Duration
ms Test
Result
per 100 bursts

14 2120.4 -31 2737.6 -31 0 75.5 100%

15 2120.4 -31 2762.4 -31 0 75.5 100%

16 2139.6 -31 2737.6 -31 0 75.5 100%

17 2139.6 -31 2762.4 -31 0 75.5 100%

18 2120.4 -14.8 2737.6 -14.8 0 75.5 100%

19 2120.4 -14.8 2762.4 -14.8 0 75.5 100%

20 2139.6 -14.8 2737.6 -14.8 0 75.5 100%

21 2139.6 -14.8 2762.4 -14.8 0 75.5 100%

22 2120.4 -31 2737.6 -25.6 -5.4 75.5 100%

23 2120.4 -31 2762.4 -25.6 -5.4 75.5 100%

24 2139.6 -31 2737.6 -25.6 -5.4 75.5 100%

25 2139.6 -31 2762.4 -25.6 -5.4 75.5 100%

26 2120.4 -25.6 2737.6 -31 +5.4 75.5 100%

27 2120.4 -25.6 2762.4 -31 +5.4 75.5 100%

28 2139.6 -25.6 2737.6 -31 +5.4 75.5 100%

29 2139.6 -25.6 2762.4 -31 +5.4 75.5 100%

30 2120.4 -14.8 2737.6 -20.2 +5.4 75.5 100%

31 2120.4 -14.8 2762.4 -20.2 +5.4 75.5 100%

32 2139.6 -14.8 2737.6 -20.2 +5.4 75.5 100%

33 2139.6 -14.8 2762.4 -20.2 +5.4 75.5 100%

34 2120.4 -20.2 2737.6 -14.8 -5.4 75.5 100%

35 2120.4 -20.2 2762.4 -14.8 -5.4 75.5 100%

36 2139.6 -20.2 2737.6 -14.8 -5.4 75.5 100%

37 2139.6 -20.2 2762.4 -14.8 -5.4 75.5 100%

Table 5 - Group 3, CAS Recognition - Parameters at 90% from Nominal, CAS 84.5 ms

Test
# Low
Freq.
Tone
HZ Low
Freq.
Tone
Level
dBm High
Freq.
Tone
Hz High
Freq.
Tone
Level
dBm Twist
Level
dB CAS
Duration
ms Test
Result
per 100 bursts

38 2120.4 -31 2737.6 -31 0 84.5 100%

39 2120.4 -31 2762.4 -31 0 84.5 100%

40 2139.6 -31 2737.6 -31 0 84.5 100%

41 2139.6 -31 2762.4 -31 0 84.5 100%

42 2120.4 -14.8 2737.6 -14.8 0 84.5 100%

43 2120.4 -14.8 2762.4 -14.8 0 84.5 100%

44 2139.6 -14.8 2737.6 -14.8 0 84.5 100%

45 2139.6 -14.8 2762.4 -14.8 0 84.5 100%

46 2120.4 -31 2737.6 -25.6 -5.4 84.5 100%

47 2120.4 -31 2762.4 -25.6 -5.4 84.5 100%

48 2139.6 -31 2737.6 -25.6 -5.4 84.5 100%

49 2139.6 -31 2762.4 -25.6 -5.4 84.5 100%

50 2120.4 -25.6 2737.6 -31 +5.4 84.5 100%

51 2120.4 -25.6 2762.4 -31 +5.4 84.5 100%

52 2139.6 -25.6 2737.6 -31 +5.4 84.5 100%

53 2139.6 -25.6 2762.4 -31 +5.4 84.5 100%

54 2120.4 -14.8 2737.6 -20.2 +5.4 84.5 100%

55 2120.4 -14.8 2762.4 -20.2 +5.4 84.5 100%

56 2139.6 -14.8 2737.6 -20.2 +5.4 84.5 100%

57 2139.6 -14.8 2762.4 -20.2 +5.4 84.5 100%

58 2120.4 -20.2 2737.6 -14.8 -5.4 84.5 100%

59 2120.4 -20.2 2762.4 -14.8 -5.4 84.5 100%

60 2139.6 -20.2 2737.6 -14.8 -5.4 84.5 100%

61 2139.6 -20.2 2762.4 -14.8 -5.4 84.5 100%

Table 6 - Group 4, CAS Reject Amplitude

Test
# Low
Freq.
Tone
HZ Low
Freq.
Tone
Level
dBm High
Freq.
Tone
Hz High
Freq.
Tone
Level
dBm Twist
Level
dB CAS
Duration
ms Test
Result
per 100 bursts

62 2130 -46 2750 -46 0 80 0%

Notes:

CAS tests were conducted per TIA/EIA-777, "Telecommunications - Telephone Terminal Equipment – Type 2 Caller Identity Equipment Performance Requirements ", November 23 1999.

Test Number and VSIM Command Line:

Test# 01: command line: vsim32 -vcasb -t-22 -OF10 -OF20 -twist0 -L640 -ocastst01.txt,d
Test# 02: command line: vsim32 -vcasb -t-22 -OF1-10.7 -OF20 -twist0 -L640 -ocastst02.txt,d
Test# 03: command line: vsim32 -vcasb -t-22 -OF110.7 -OF20 -twist0 -L640 -ocastst03.txt,d
Test# 04: command line: vsim32 -vcasb -t-22 -OF10 -OF2-13.8 -twist0 -L640 -ocastst04.txt,d
Test# 05: command line: vsim32 -vcasb -t-22 -OF10 -OF213.8 -twist0 -L640 -ocastst05.txt,d
Test# 06: command line: vsim32 -vcasb -t-32 -OF10 -OF20 -twist0 -L640 -ocastst06.txt,d
Test# 07: command line: vsim32 -vcasb -t-14 -OF10 -OF20 -twist0 -L640 -ocastst07.txt,d
Test# 08: command line: vsim32 -vcasb -t-32 -OF10 -OF20 -twist6 -L640 -ocastst08.txt,d
Test# 09: command line: vsim32 -vcasb -t-26 -OF10 -OF20 -twist-6 -L640 -ocastst09.txt,d
Test# 10: command line: vsim32 -vcasb -t-14 -OF10 -OF20 -twist-6 -L640 -ocastst10.txt,d
Test# 11: command line: vsim32 -vcasb -t-20 -OF10 -OF20 -twist6 -L640 -ocastst11.txt,d
Test# 12: command line: vsim32 -vcasb -t-22 -OF10 -OF20 -twist0 -L600 -ocastst12.txt,d
Test# 13: command line: vsim32 -vcasb -t-22 -OF10 -OF20 -twist0 -L680 -ocastst13.txt,d
Test# 14: command line: vsim32 -vcasb -t-31 -OF1-9.6 -OF2-12.4 -twist0 -L604 -ocastst14.txt,d
Test# 15: command line: vsim32 -vcasb -t-31 -OF1-9.6 -OF212.4 -twist0 -L604 -ocastst15.txt,d
Test# 16: command line: vsim32 -vcasb -t-31 -OF19.6 -OF21-2.4 -twist0 -L604 -ocastst16.txt,d
Test# 17: command line: vsim32 -vcasb -t-31 -OF19.6 -OF212.4 -twist0 -L604 -ocastst17.txt,d
Test# 18: command line: vsim32 -vcasb -t-14.8 -OF1-9.6 -OF2-12.4 -twist0 -L604 -ocastst18.txt,d
Test# 19: command line: vsim32 -vcasb -t-14.8 -OF1-9.6 -OF212.4 -twist0 -L604 -ocastst19.txt,d
Test# 20: command line: vsim32 -vcasb -t-14.8 -OF19.6 -OF21-2.4 -twist0 -L604 -ocastst20.txt,d
Test# 21: command line: vsim32 -vcasb -t-14.8 -OF19.6 -OF212.4 -twist0 -L604 -ocastst21.txt,d
Test# 22: command line: vsim32 -vcasb -t-31 -OF1-9.6 -OF2-12.4 -twist5.4 -L604 -ocastst22.txt,d
Test# 23: command line: vsim32 -vcasb -t-31 -OF1-9.6 -OF212.4 -twist5.4 -L604 -ocastst23.txt,d
Test# 24: command line: vsim32 -vcasb -t-31 -OF19.6 -OF21-2.4 -twist5.4 -L604 -ocastst24.txt,d
Test# 25: command line: vsim32 -vcasb -t-31 -OF19.6 -OF212.4 -twist5.4 -L604 -ocastst25.txt,d
Test# 26: command line: vsim32 -vcasb -t-25.6 -OF1-9.6 -OF2-12.4 -twist-5.4 -L604 -ocastst26.txt,d
Test# 27: command line: vsim32 -vcasb -t-25.6 -OF1-9.6 -OF212.4 -twist-5.4 -L604 -ocastst27.txt,d
Test# 28: command line: vsim32 -vcasb -t-25.6 -OF19.6 -OF21-2.4 -twist-5.4 -L604 -ocastst28.txt,d
Test# 29: command line: vsim32 -vcasb -t-25.6 -OF19.6 -OF212.4 -twist-5.4 -L604 -ocastst29.txt,d
Test# 30: command line: vsim32 -vcasb -t-14.8 -OF1-9.6 -OF2-12.4 -twist-5.4 -L604 -ocastst30.txt,d
Test# 31: command line: vsim32 -vcasb -t-14.8 -OF1-9.6 -OF212.4 -twist-5.4 -L604 -ocastst31.txt,d
Test# 32: command line: vsim32 -vcasb -t-14.8 -OF19.6 -OF21-2.4 -twist-5.4 -L604 -ocastst32.txt,d
Test# 33: command line: vsim32 -vcasb -t-14.8 -OF19.6 -OF212.4 -twist-5.4 -L604 -ocastst33.txt,d
Test# 34: command line: vsim32 -vcasb -t-20.2 -OF1-9.6 -OF2-12.4 -twist5.4 -L604 -ocastst34.txt,d
Test# 35: command line: vsim32 -vcasb -t-20.2 -OF1-9.6 -OF212.4 -twist5.4 -L604 -ocastst35.txt,d
Test# 36: command line: vsim32 -vcasb -t-20.2 -OF19.6 -OF21-2.4 -twist5.4 -L604 -ocastst36.txt,d
Test# 37: command line: vsim32 -vcasb -t-20.2 -OF19.6 -OF212.4 -twist5.4 -L604 -ocastst37.txt,d
Test# 38: command line: vsim32 -vcasb -t-31 -OF1-9.6 -OF2-12.4 -twist0 -L676 -ocastst38.txt,d
Test# 39: command line: vsim32 -vcasb -t-31 -OF1-9.6 -OF212.4 -twist0 -L676 -ocastst39.txt,d
Test# 40: command line: vsim32 -vcasb -t-31 -OF19.6 -OF21-2.4 -twist0 -L676 -ocastst40.txt,d
Test# 41: command line: vsim32 -vcasb -t-31 -OF19.6 -OF212.4 -twist0 -L676 -ocastst41.txt,d
Test# 42: command line: vsim32 -vcasb -t-14.8 -OF1-9.6 -OF2-12.4 -twist0 -L676 -ocastst42.txt,d
Test# 43: command line: vsim32 -vcasb -t-14.8 -OF1-9.6 -OF212.4 -twist0 -L676 -ocastst43.txt,d
Test# 44: command line: vsim32 -vcasb -t-14.8 -OF19.6 -OF21-2.4 -twist0 -L676 -ocastst44.txt,d
Test# 45: command line: vsim32 -vcasb -t-14.8 -OF19.6 -OF212.4 -twist0 -L676 -ocastst45.txt,d
Test# 46: command line: vsim32 -vcasb -t-31 -OF1-9.6 -OF2-12.4 -twist5.4 -L676 -ocastst46.txt,d
Test# 47: command line: vsim32 -vcasb -t-31 -OF1-9.6 -OF212.4 -twist5.4 -L676 -ocastst47.txt,d
Test# 48: command line: vsim32 -vcasb -t-31 -OF19.6 -OF21-2.4 -twist5.4 -L676 -ocastst48.txt,d
Test# 49: command line: vsim32 -vcasb -t-31 -OF19.6 -OF212.4 -twist5.4 -L676 -ocastst49.txt,d
Test# 50: command line: vsim32 -vcasb -t-25.6 -OF1-9.6 -OF2-12.4 -twist-5.4 -L676 -ocastst50.txt,d
Test# 51: command line: vsim32 -vcasb -t-25.6 -OF1-9.6 -OF212.4 -twist-5.4 -L676 -ocastst51.txt,d
Test# 52: command line: vsim32 -vcasb -t-25.6 -OF19.6 -OF21-2.4 -twist-5.4 -L676 -ocastst52.txt,d
Test# 53: command line: vsim32 -vcasb -t-25.6 -OF19.6 -OF212.4 -twist-5.4 -L676 -ocastst53.txt,d
Test# 54: command line: vsim32 -vcasb -t-14.8 -OF1-9.6 -OF2-12.4 -twist-5.4 -L676 -ocastst54.txt,d
Test# 55: command line: vsim32 -vcasb -t-14.8 -OF1-9.6 -OF212.4 -twist-5.4 -L676 -ocastst55.txt,d
Test# 56: command line: vsim32 -vcasb -t-14.8 -OF19.6 -OF21-2.4 -twist-5.4 -L676 -ocastst56.txt,d
Test# 57: command line: vsim32 -vcasb -t-14.8 -OF19.6 -OF212.4 -twist-5.4 -L676 -ocastst57.txt,d
Test# 58: command line: vsim32 -vcasb -t-20.2 -OF1-9.6 -OF2-12.4 -twist5.4 -L676 -ocastst58.txt,d
Test# 59: command line: vsim32 -vcasb -t-20.2 -OF1-9.6 -OF212.4 -twist5.4 -L676 -ocastst59.txt,d
Test# 60: command line: vsim32 -vcasb -t-20.2 -OF19.6 -OF21-2.4 -twist5.4 -L676 -ocastst60.txt,d
Test# 61: command line: vsim32 -vcasb -t-20.2 -OF19.6 -OF212.4 -twist5.4 -L676 -ocastst61.txt,d
Test# 62: command line: vsim32 -vcasb -t-46 -OF10 -OF20 -twist0 -L640 -ocastst62.txt,d

V.42 Test Results

V.42 Testing

MESi (Tiger C5410 board)

USR Sportster 33.6 (Texas Instruments)

Hayes Accura 56K (Lucent)

Atlas 33.6 (Cirrus)

Modem Blaster 56K (Rockwell)

Penril Alliance V34 (Texas Instruments)

Zoom 56K (AT&T)

Supra Diamond 56k (Rockwell)

Motorola ModemSurfer 56k
(Motorola)

Hayes Accura 144 (AT&T)

GVC 28800 FAX Modem

ELSA Microlink 56kFAX Modem

Xircom PCMCIA 56K Modem

TDK CyberExpress v.34 (TDK)

3Com EtherLink III
(Motorola)

inter-operability (ANSWER/
CALL mode)
V.22bis 1200
PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS

V.22bis 2400
PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS

V.32bis 4800

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

V.32bis 7200

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

V.32bis 9600

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

V.32bis 12000

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

V.32bis 14400

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

retrains/rate change

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

renegotiate

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

noise - random errors

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

PASS/
PASS

v.42bis inter-operability (ANSWER/
CALL mode)
PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS PASS/
PASS

Notes::

All tests are conducted with the MESi modem running on a DSP Research Tiger54x board.

The V.42 Interoperability tests have the MESi modem generating a repeated, fixed pattern (that ascii character set) and a PASS/PASS indicates that the modems connected in both CALL and ANSWER modes respectively, established a LAP-M corrected session, and remained connected for 10 minutes.

The V.42bis interoperability tests have the MESi modem transferring a test file to the modem under test, transferring random characters, and remaining connected for 10 minutes.

V.42bis Test Results

1X30.TST

Dictionary Size

String Len

512

1024

2048

4096

8192

16384

6

302397

252409

245517

250910

264969

264969

8

283191

226713

200969

193954

203632

208742

16

275617

205233

165885

141566

123198

122815

32

276427

195880

156556

127536

105142

92188

64

276427

193180

151834

126178

102526

86376

128

276427

191880

149286

124234

102646

87065

250

276427

191880

149286

124234

102677

86794

2X10.TST

Dictionary Size

String Len

512

1024

2048

4096

8192

16384

6

146839

144261

147940

147137

131878

118119

8

143914

140429

142934

141220

123066

107332

16

141088

138834

137085

133356

116024

96419

32

141003

138100

135954

131163

114248

93410

64

141003

138147

135904

130665

114106

92857

128

141003

138147

135904

130665

114106

92857

250

141003

138147

135904

130665

114106

92857

3X06.TST

Dictionary Size

String Len

512

1024

2048

4096

8192

16384

6

128446

134642

142772

150743

153595

146148

8

127717

133849

141799

149675

151882

144203

16

127575

133789

141731

149141

151107

143055

32

127575

133789

141731

149123

151024

142952

64

127575

133789

141731

149123

151024

142952

128

127575

133789

141731

149123

151024

142952

250

127575

133789

141731

149123

151024

142952

4X04.TST

Dictionary Size

String Len

512

1024

2048

4096

8192

16384

6

131268

131268

131268

131268

131268

131335

8

131268

131268

131268

131268

131268

131335

16

131268

131268

131268

131268

131268

131335

32

131268

131268

131268

131268

131268

131335

64

131268

131268

131268

131268

131268

131335

128

131268

131268

131268

131268

131268

131335

250

131268

131268

131268

131268

131268

131335

5X16.TST

Dictionary Size

String Len

512

1024

2048

4096

8192

16384

6

192438

189915

192553

186107

174583

171061

8

179475

175260

175092

166444

150898

144720

16

161247

154624

151018

138905

120983

109618

32

154011

145624

140411

126812

107437

95287

64

152994

141475

135857

121112

101269

88795

128

157759

140680

134001

118549

99052

85296

250

158528

142634

134739

117821

98032

84136

Notes:

Tests were conducted per TIA/EIA TSB38, "Test Procedure for Evaluation of 2-Wire 4-Kilohertz Voice-band Duplex Modems", December 1994.

Test files n.TST are sourced from the TIA and are described in ANNEX C of TSB-38.

Tests were performed using C source v.42bis implementation and file I/O on a PC.

Parameter	Time - Cadence-Based (default)	Time - North American
Tone Detect time	92 msec.	52 msec.
Resolve DIALTONE time	2.0 sec.	52 msec.
DIALTONE release time	0.4 sec.	52 msec.
Resolve RINGBACK time	2.8 sec.	52 msec.
RINGBACK release time	0.8 sec.	52 msec.
Resolve BUSY time	2.4 sec.	52 msec.
BUSY release time	0.8 sec.	52 msec.
Resolve REORDER time	2.6 sec.	52 msec.
REORDER release time	0.8 sec.	52 msec.

Parameter	Cadence-Based (default)	North American
Tone Detect frequency range	250 Hz to 750 Hz	350 Hz to 620 Hz
Tone Detect dynamic range	-6 dBm to -43 dBm	-6 dBm to -43 dBm

Country	Dial Tone	Ring-back	Busy	Congestion
Australia	400 Hz + 450 Hz continuous	425 Hz, 0.4s ON, 0.2s OFF, then 0.4s ON, 2.0s OFF	425 Hz, 0.375s ON, 0.375s OFF	425 Hz, 0.375s ON, 0.375s OFF
Austria	400 Hz to 490 Hz continuous	400 Hz to 490 Hz, 1.0s ON, 5.0s OFF	400 Hz to 490 Hz, 0.3s ON, 0.3s OFF	400 Hz to 490 Hz, 0.2s ON, 0.2s OFF
Belgium	450 Hz continuous	450 Hz, 1.0s ON, 3.0s OFF	450 Hz, 0.5s ON, 0.5s OFF	450 Hz, 0.167s ON, 0.167s OFF
Brazil	425 Hz continuous	425 Hz, 1.0s ON, 4.0s OFF	425 Hz, 0.25s ON, 0.25s OFF	425 Hz, 0.25s ON, 1.0s OFF
Britain	400 Hz + 450 Hz continuous	400 Hz + 450 Hz, 0.35s ON, 0.22s OFF, then 0.4s ON, 0.2s OFF, 0.4s ON, 2.0s OFF	400 Hz, 0.375s ON, 0.375s OFF	400 Hz, 0.35s ON, 0.225s OFF
Canada	350 Hz + 440 Hz continuous	440 Hz + 480 Hz, 2.0s ON, 4.0s OFF	480 Hz + 620 Hz, 0.5s ON, 0.5s OFF	480 Hz + 620 Hz, 0.25s ON, 0.25s OFF
Czech. Republic	370 Hz to 500 Hz continuous	370 Hz to 500 Hz, 1.0s ON, 4.0s OFF	425 Hz, 0.33s ON, 0.33s OFF	425 Hz, 0.16s ON, 0.16s OFF
Denmark	425 Hz continuous		425 Hz, 0.25s ON, 0.25s OFF	425 Hz, 0.25s ON, 0.25s OFF
Finland	425 Hz continuous		425 Hz, 0.3s ON, 0.3s OFF	425 Hz, 0.2s ON, 0.2s OFF
France	440 Hz continuous	440 Hz, 1.5s ON, 3.5s OFF	440 Hz, 0.5s ON, 0.5s OFF	440 Hz, 0.5s ON, 0.5s OFF
Germany	425 Hz continuous	425 Hz, 1.0s ON, 4.0s OFF	425 Hz, 0.48s ON, 0.48s OFF	425 Hz, 0.24s ON, 0.24s OFF
Greece	450 Hz continuous		450 Hz, 0.3s ON, 0.3s OFF	450 Hz, 0.3s ON, 0.3s OFF
Hungary	425 Hz continuous		425 Hz, 0.3s ON, 0.3s OFF	425 Hz, 0.3s ON, 0.3s OFF
Iceland	400 Hz to 450 Hz continuous		425 Hz, 0.25s ON, 0.25s OFF	425 Hz, 0.25s ON, 0.25s OFF
Ireland	400 Hz + 450 Hz continuous	400 Hz + 450 Hz, 2.0s ON, 4.0s OFF	400 Hz + 450 Hz, 0.375s ON, 0.375s OFF	400 Hz + 450 Hz, 0.375s ON, 0.375s OFF
Italy	425 Hz continuous 0.2s ON, 0.2s OFF, 0.6s ON, 1.0s OFF repeated	425 Hz, 1.0s ON, 4.0s OFF	425 Hz, 0.5s ON, 0.5s OFF	425 Hz, 0.5s ON, 0.5s OFF
Japan	400 Hz continuous	384 Hz + 416 Hz, 1.0s ON, 2.0s OFF	400 Hz, 0.5s ON, 0.5s OFF	400 Hz, 0.5s ON, 0.5s OFF
Luxembourg	380 Hz to 490 Hz continuous		380 Hz to 490 Hz, 0.5s ON, 0.5s OFF	380 Hz to 490 Hz, 0.5s ON, 0.5s OFF
Mexico	425 Hz continuous	425 Hz, 1.0s ON, 4.0s OFF	425 Hz, 0.25s ON, 0.25s OFF	425 Hz, 0.25s ON, 0.25s OFF
Norway	425 Hz continuous	425 Hz, 1.0s ON, 4.0s OFF	425 Hz, 0.5s ON, 0.5s OFF	425 Hz, 0.2s ON, 0.2s OFF
Poland	360 Hz to 450 Hz continuous		360 Hz to 450 Hz, 0.5s ON, 0.5s OFF
Portugal	425 Hz continuous	425 Hz, 1.0s ON, 5.0s OFF	425 Hz, 0.5s ON, 0.5s OFF	425 Hz, 0.2s ON, 0.2s OFF
Spain	425 Hz continuous	425 Hz, 1.5s ON, 3.0s OFF	425 Hz, 0.2s ON, 0.2s OFF	425 Hz, 0.2s ON, 0.2s OFF
Sweden	425 Hz continuous	425 Hz, 1.0s ON, 5.0s OFF	425 Hz, 0.25s ON, 0.25s OFF	425 Hz, 0.25s ON, 0.75s OFF
Turkey	450 Hz continuous	450 Hz, 2.0s ON, 4.0s OFF	450 Hz, 0.5s ON, 0.5s OFF	450 Hz, 0.2s ON, 0.2s OFF
USA	350 Hz + 440 Hz continuous	440 Hz + 480 Hz, 2.0s ON, 4.0s OFF	480 Hz + 620 Hz, 0.5s ON, 0.5s OFF	480 Hz + 620 Hz, 0.25s ON, 0.25s OFF

Test #	Low Freq. Tone HZ	Low Freq. Tone Level dBm	High Freq. Tone Hz	High Freq. Tone Level dBm	Twist Level dB	CAS Duration ms	Test Result per 100 bursts
1	2130	-22	2750	-22	0	80	100%

1X30.TST	Dictionary Size
String Len	512	1024	2048	4096	8192	16384
6	302397	252409	245517	250910	264969	264969
8	283191	226713	200969	193954	203632	208742
16	275617	205233	165885	141566	123198	122815
32	276427	195880	156556	127536	105142	92188
64	276427	193180	151834	126178	102526	86376
128	276427	191880	149286	124234	102646	87065
250	276427	191880	149286	124234	102677	86794
2X10.TST	Dictionary Size
String Len	512	1024	2048	4096	8192	16384
6	146839	144261	147940	147137	131878	118119
8	143914	140429	142934	141220	123066	107332
16	141088	138834	137085	133356	116024	96419
32	141003	138100	135954	131163	114248	93410
64	141003	138147	135904	130665	114106	92857
128	141003	138147	135904	130665	114106	92857
250	141003	138147	135904	130665	114106	92857
3X06.TST	Dictionary Size
String Len	512	1024	2048	4096	8192	16384
6	128446	134642	142772	150743	153595	146148
8	127717	133849	141799	149675	151882	144203
16	127575	133789	141731	149141	151107	143055
32	127575	133789	141731	149123	151024	142952
64	127575	133789	141731	149123	151024	142952
128	127575	133789	141731	149123	151024	142952
250	127575	133789	141731	149123	151024	142952
4X04.TST	Dictionary Size
String Len	512	1024	2048	4096	8192	16384
6	131268	131268	131268	131268	131268	131335
8	131268	131268	131268	131268	131268	131335
16	131268	131268	131268	131268	131268	131335
32	131268	131268	131268	131268	131268	131335
64	131268	131268	131268	131268	131268	131335
128	131268	131268	131268	131268	131268	131335
250	131268	131268	131268	131268	131268	131335
5X16.TST	Dictionary Size
String Len	512	1024	2048	4096	8192	16384
6	192438	189915	192553	186107	174583	171061
8	179475	175260	175092	166444	150898	144720
16	161247	154624	151018	138905	120983	109618
32	154011	145624	140411	126812	107437	95287
64	152994	141475	135857	121112	101269	88795
128	157759	140680	134001	118549	99052	85296
250	158528	142634	134739	117821	98032	84136