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sandman.com
Helping you make IT work...
Since 1990
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Check out our new training video on Low Voltage Mounting Bracket Installation.

Telecom and IT Knowledgebase Articles from the Experts at sandman.com

  1. Troubleshooting Basics - Tips to Troubleshoot Telecom & IT Problems


    Learn basic troubleshooting techniques that can help you save time diagnosing and fixing phone and network equipment.

  2. Telephone Line Diagnostic Table (PDF)


    These are the AC, DC, Current and Circuit Loss readings you need to take to figure out why a phone line is doing strange stuff. It's what we fill out on every service call where there's a strange problem!
    Start by filling out this PDF chart to diagnose strange problems!

  3. Professional Low Voltage Bracket Installation Template (video)


    Learn to quickly and professionally install low voltage mounting brackets with our LV Template

  4. What is a Noise Cancelling Handset and How Does It Work?


    What is a noise cancelling handset and how do they work?

  5. Things to Think About BEFORE Switching to VoIP... VoIP Research Tech Bulletin


    Things to Think About BEFORE Switching to VoIP... a list of quirks you're likely to run into trying to make VoIP work... Read it now, or live it later!

  6. VoIP Checklist from sandman.com


    A quick checklist for both homes and businesses to consider when switching to VoIP phone lines.

  7. Echo and DTMF Troubleshooting Bulletin


    All the things you can try to eliminate echo on a VoIP system, improve DTMF digit recognition and make a modem or fax machine communicate.

  8. Troubleshooting Caller ID Problems


    Tips on how to fix Caller ID problems. Includes things to check when it works on a cheap Caller ID box, but won't work on the expensive phone system. DON'T Replace the KSU first!

  9. RFI Troubleshooting Flow Chart (PDF)


    Radio Frequency Interference (RFI) Troubleshooting Flow Chart (PDF)

  10. Radio Frequency Eliminator Placement


    Diagrams showing possible placement for radio frequency eliminators

  11. Radio Frequency Interference (RFI) Troubleshooting and Elimination


    Eliminate Radio Frequency Interference (RFI) on phones, headsets, handsets and ethernet equipment.

  12. Analog Telephony... How We Got Here, and What's Happening Now?


    Analog Telephony... How We Got Here, and What's Happening Now?

  13. Cordless Phone / Wi-Fi / RFID Troubleshooting


    How to troubleshoot Cordless Phone and other wireless problems, including DECT phones that can reduce interference

  14. Call Party Contrl (CPC) Troubleshooting


    Troubleshooting Calling Party Control (CPC) Problems

  15. Electrical Grounding Tech Bulletin


    A bad ground can cause all kinds of strange problems as well as allowing surges to blow your equipment up

  16. AC Power & Ground Tech Bulletin


    There are some easy ways to determine whether AC Power or the AC Ground is causing your problems.

  17. Hum Elimination Tech Bulletin from sandman.com


    Things to check, step by step, to find the cause of hum on analog phone lines or station ports

  18. Loop Current & Circuit Loss Technical Bulletin


    Fix "Unfixable" problems caused by irregular loop current and circuit loss

  19. Data Noise Elimination Tech Bulletin


    Fix problems on phone lines coming from fake phone line boxes, like cable company, fiber optic, uverse, fios, VoIP and other fake phone lines

  20. Longitudinal Imbalance Tech Bulletin


    Fix hum and strange unfixable problems

  21. Telephone Ring Voltage Tech Bulletin


    Why won't your phone ring? Learn about ring voltage and how to measure AC ring voltage with a digital volt meter.

  22. Fire Alarm Phone Line Trouble Alarm Tech Bulletin


    How to fix intermittent fire alarm phone line trouble alarms caused by low voltage

  23. Crosstalk Elimination Tech Bulletin


    How to Find and Fix Crosstalk on Analog Phone Lines and Station Ports

  24. Conference Call Tech Bulletin from sandman.com


    Fix the problem where the two outside parties can't hear each other on a conference call, or when transferred out of the system on a second line using the system's External Call Transfer feature

  25. Magic Jack Tech Bulletin


    Making the Magic Jack work with more than one phone, or old phones with real bells

  26. Message Waiting Tech Bulletin from sandman.com


    Explains how the different message waiting types work

  27. Hearing Aid Compatibility Tech Bulletin


    The secret meaning of Hearing Aid Compatibility

  28. The Hookswitch Story from sandman.com


    How sandman.com got started - the hookswitch story

  29. Repairing Rubber Buttons


    Repair bad dials, keystrips and remote control buttons

  30. RS-232 Tech Bulletin from sandman.com


    How to make any serial (RS-232) connection work in 10 minutes!

  31. Repairing Merlin Membranes & Keys


    Tips for repairing Merlin and Spirit membranes

  32. Phone & Computer Cleaning Kit Instructions


    Cleaning Kit Instructions to make used Phones and Computers look like new!

  33. Burnishing Tool Instructions from sandman.com


    Instructions for using a burnishing tool to fix sticking dials and clean electrical contacts.

  34. Modem Protector Tech Bulletin from sandman.com


    If you still use a modem, learn how to protect it with our modem protector.

  35. Telephone Line Tap/Bug Tech Bulletin


    If you think your phone line is tapped or bugged, what do you do?

  36. The China Factor in Telecom


    "Why my phones (and other things) don't work right"

  37. External Paging, Loud Bell & Strobe Tech Bulletin from sandman.com


    How to get a phone system to do something it wasn't made to do...

  38. Is AC Power Your Problem?


    When you're fighting a problem, do you assume your AC power is OK?

  39. Is it Noisy? You probably don't need an amplified handset!


    In a noisy environment, an amplified handset may not be your best bet... Here's why...

  40. A Bad Ground Can be Very Expensive in a Lightning Storm!


    A bad ground can be very expensive in a lightning storm!

  41. How do you see BLOCKED and PRIVATE numbers on CallerID?


    How do you see those BLOCKED or PRIVATE numbers on CallerID, and how to stop robo callers.

  42. The Value of CDR and SMDR in Fixing Strange Phone Problems


    How call accounting logs can help you detect and fix strange problems with your phone system.

  43. Problems with Data Noise on IP Office Systems (and others)


    Learn about data noise issues that commonly occur with IP office systems, noise that you can hear and some you can't.

  44. What Chance Does your Company Have of Deflecting Hackers


    What chance does your company have of deflecting hackers if nobody else seems to be able to?

  45. How to Disable Government Cell Phone Alerts


    Cell phone companies are forcing you to get emergency weather and government notifications at all times of the day or night - unless you know how to turn if off...

  46. How to Run DOS Programs on Windows 7/8/10 and Other Windows Tips


    How to run DOS programs on Windows 7/8/10 and Other Handy Windows Tips

  47. Emergency Alerting - It's Got to Be Tested!


    Don't forget to test your emergency alert systems!

  48. Extending a T1 a Long Ways into a Building or Campus


    Tips on how to extend the range of your T1

  49. Make a Fax Machine work on a VoIP ATA or Gateway


    Tips to help you get your fax machine working with your VoIP ATA or Gateway.

  50. Fixing Hum on an Analog Phone Line or Analog Station Port


    Common causes of hum on your phone line, and solutions to help fix it.

  51. Fix Crackling Static on Analog Phone Lines and Station Ports


    Tips for solving crackling static on analog phone lines and analog station ports.

  52. Do you put lightning protection on your systems, or wait for damage, then add protectors?


    Tips to help you decide if you should install lightning protection on your new phone system installations.

  53. How can you protect your Internet connected VoIP system?


    It doesn't take much to stop a VoIP system connected to the Internet... How can you protect it?

  54. When is buying something that says it's QoC useless for VoIP?


    Trying to use QoS to improve your VoIP calls? It may or may not help!

  55. Refurbishing Phones and Computers


    Refurbishing your Own Phones, Computers and Tools is Easy and Profitable!

  56. Why There's No Way to Secure your Company Data, and What to Do About It


    Why There's No Way to Secure your Company Data, and What to Do About It

  57. Seperate VoIP Network for Great Sounding Calls


    How do you keep your VoIP packets from NEVER travelling over the public internet... so they always sound great?

  58. Solid vs Stranded Wires and Modular Plugs


    How to determine what type of plugs you have, and crimp them properly.

  59. How Do You Stop Static Shocks to Phones & Computers


    When the heat comes on in the fall, the air dries out and static electricity comes alive

  60. Telecom Fraud Prevention Tips


    Check your phone and voicemail systems for these types of vulnerabilities!

  61. Call Quality: An Easy Way to Hear How Your Phone Sounds on the Other End


    Some tips to see how your call sounds from the other end.

  62. Can you troubleshoot phone problems remotely?


    Can you troubleshoot phone problems remotely or do you have to send out a technician?

  63. Dial-Around 1010 Codes can Solve Problems with Call Quality


    Dial-Around 1010 codes can solve problems with call quality, faxes and modems

  64. What is Sidetone, and why do you need it?


    What is sidetone, and why do you need it?