Archive for the ‘Datacomm’ Category:

2019-07-09 My Telecom/datacomm Background

from FB group Bell Telephone of… Jul 09 Jon Guidry (new member) I was a telecomm/datacomm tech for Santa Ana College and the rest of the college district, so we were a customer of Pac Bell/SBC/at&t. I did all house Telecom and datacomm wiring and plant for 3+ decades. I was a craftsperson like many

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2019-06-09 Strange 3 Conductor Crossconnect Wire

from FB group Bell Telephone… Jun 11 I’ve seen this 3 wire crossconnect wire, but I can’t remember where. Long ago we had racks of datacomm with a patch panel with patch cords. We used 3 wires of four wire IW, one wire for common, one for transmit and one for receive. These were for

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2019-05-22 Fiber Installing In Near Future

from FB group Orange Talk May 23 Jack What I’ve seen is the internet service providers have eliminated the lowest speeds and lowest prices of course, and now offer only higher speeds and higher prices. For the city of Orange, there will be at&t fiber cables installed in the near future, so Sputum cable will

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2019-05-21 Upstream Data Concentration

from FB group Bell Telephone… May 22 Keith Hlavacs I was connecting up equipment with cat5e and cat6 cabling capable of 1000 Meg’s, and there were 48 ports on the switches on campus. The GBIC feeds on, say, 4 switches were daisychained, so a total of 192 ports per fiber optic feeder. So… I see

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2019-04-06 HP Transmission Test Set

from FB group Bell Telephone of… Apr 6 (I bought a transmission test set, TTS-4, photo at bottom.) Glenn Peters We had a HP 493something transmission test set for testing up to 56 kb/s lines. I remember seeing the symbols on the green screen, like a carriage return would look like a little ‘CR’. The

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2019-04-01 Microwave Versus Radar Power

from FB group Bell Telephone of … Apr 2 Sam Corcione The Radars I worked on in the army were putting out peak power at 5 megawatts, but because it was listening most of the time, the average power was “only” 5 kilowatts, still equal to several microwave ovens. But it had to illuminate a

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2019-03-27

From FB group transistor radios Mar 29 Lin Holcomb One never knows what secrets the US government has hidden. They could have some other plans for using the WWV stations. Decades ago I worked for a radio engineer, and we had a frequency counter traceable to NBS (now NIST). He noticed that the frequency of

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2018-11-20 Solder V. IDC Punchdown

from FB group Bell Telephone… 2018-11-22 Happy Turkey day! I use solder all the time, and I trust it as long as it’s done properly. But one thing I learned in my decades of telephone work is that the wiring systems the telcos developed were tested and proven before they were deployed, and they were

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2018-10-24 The AT&T L.D. Network Crashed 1990

The article about the system crash. As was stated in the article, C is not as structured as some other languages, which may allow the programmer to write code that has unintended consequences. Jay Neale said ‘C is very unforgiving.’ But C allows you to do things with the implication that you know what you’re

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2018-06-22 Telco Craftspeople

From FB group Bell Telephone… As a customer and the point man who interfaced with the Telco, I have nothing but good to say about all the fine craftspeople I dealt with during my 33 years with the college district. I only wish I could have spoken as highly of other contractors I had to

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