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October 2008 - Fax and Telecom Testing Blog
Fax and Telecom Testing Blog
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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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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
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