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New FaxLab 7 Product for T.30 and T.38 Fax Interoperability Testing
Fax Book and Free Test
What is NSF... and why should I care?
V.34 to V.17 Can Be a Hard Fall
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March 2009 (1)
October 2008 (5)
September 2008 (4)
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New FaxLab 7 Product for T.30 and T.38 Fax Interoperability Testing
QualityLogic is pleased to announce a major upgrade to the FaxLab fax interoperabilty testing tool. FaxLab is used by device manufacturers, network equipment providers, and carriers to simplify the process of fax device compatibility testing. It tests...
Published
13 Mar 2009 3:43 PM
by
Steve Kang
Filed under:
Fax Interoperability
,
Fax Test
,
Fax Problems
,
T.30 Test
,
T.38 Test
Fax Book and Free Test
For those of you working with Fax of IP, an interesting book called "Fax, Modem, and Text for IP Telephony" was recently published by Cisco Press. This book covers both T30 and T38 basics, as well as much more. It has very positive reviews on...
Published
31 Oct 2008 3:27 PM
by
Jim Zuber
Filed under:
Fax
,
t.38
,
t.30
,
telecom industry
What is NSF... and why should I care?
In the late '70s, T.30 was created to make fax machines something they had never been before, interoperable. But many of their manufacturers wanted to go outside of T.30 and continue to use some of their non-standard tricks and abilities. The integrated...
Published
23 Oct 2008 1:53 PM
by
John Lunsford
Filed under:
Fax
,
t.30
,
telecom industry
V.34 to V.17 Can Be a Hard Fall
Now that the V.34 compatibility battle is finally being won, a new problem has surfaced. How do two fax terminals that were attempting to use V.34 mutually decide to abandon it, fall back to V.17 and complete sending their pages? When the "Super...
Published
22 Oct 2008 8:26 PM
by
John Lunsford
Filed under:
Fax
,
t.30
,
Tips and Tricks
,
telecom industry
Fax Transmission Power — More Is Not Always Better
There is an article of faith among analog electronics engineers that, if you have to send a signal through difficult conditions, pumping up the power is a good, time honored approach to doing so. But, what about distortion? Somewhere power boosts have...
Published
8 Oct 2008 7:43 PM
by
John Lunsford
Filed under:
Fax
,
t.30
,
Tips and Tricks
,
telecom industry
ITU E.450 Figure Of Merit – The User’s Point of View
The dichotomy of fax protocol conformance versus interoperability becomes most pointed when it is necessary to gauge the performance of a fax terminal. A Quality of Service (QoS) standard is simply a necessity for this type of evaluation. The ITU undertook...
Published
1 Oct 2008 9:23 PM
by
John Lunsford
Filed under:
Fax
,
t.30
,
Tips and Tricks
,
telecom industry
Version 3 of T.38 — It's Likely to be in Your Future
Economic conditions being what they are, the Fax over IP (FoIP) user community is looking for an edge. V.34 'Super G3' fax, covered by version 3 of T.38, makes Internet fax transmissions really move saving money and bandwidth. The original version...
Published
24 Sep 2008 9:01 PM
by
John Lunsford
Filed under:
Fax
,
t.38
,
telecom industry
Comparing Fax Call Data From Different Sources
How can data files that monitor the same test call but come from disconnected sources be directly compared with each other? In the Post Mortem Analysis of T.30 and T.38 Traffic posting, I pointed out that QualityLogic's DataProbe T30-T38 Analyzer...
Published
18 Sep 2008 8:16 PM
by
John Lunsford
Filed under:
Fax
,
t.38
,
t.30
,
telecom industry
Fax Conformance vs. Interoperability — How do you strike the balance?
For years, fax device manufacturers have pondered the question of how much accommodation they should make for non T.30 compliant devices. Too little and customers complain about inability to send their pages, too much and development costs soar. The roots...
Published
18 Sep 2008 12:36 PM
by
John Lunsford
Filed under:
Fax
,
t.38
,
telecom industry
Post Mortem Analysis of T.30 and T.38 Traffic
Facsimile traffic has followed voice traffic in its migration to the Internet. Historically, the T.30 protocol has been used to transmit facsimile messages over the traditional PSTN network. Because T.30 contained a variety of timing constraints that...
Published
15 Sep 2008 6:42 PM
by
John Lunsford
Filed under:
Fax
,
t.38
,
t.30
,
Analysis
,
Dataprobe
,
Tips and Tricks
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