Pots 66 Block
Data Surge Protector SPD PBM Indoor POTS 66 Punch Down Block Receptacle Sidactor 270 V Transtector phone line surge protector / arrester (also known as data line surge protection device or SPD as well as transient voltage surge suppressor or TVSS) 1101-115 is in-stock and will ship same business day as purchased from us directly.
Datacom › Troubleshooting and Monitoring POTS Phone Lines with a Test Set. For troubleshooting purposes it often becomes necessary, for a lineman to test a telephone line with a butt set, as a primary means of tracking down problems with the phone itself or the telephone line. There are multiple ways the butt set can be used. A pebble or stone border will give a floating effect to your deck, and planting with succulents will give an extra pop of colour. For a more relaxed feel, fill your border with soil and plant with leafy shrubs. Alternatively, you could surround the perimeter of your decking with patio blocks and line with pots of bonsai plants. Wiring a 66 block with Category 5 unshielded twisted-pair cable requires a different termination method not typically used with voice-grade cables. Solution The following procedure will help ensure that the pair untwist of any twisted pair of conductors will be less than or equal to the 0.5-inch requirement of the Telecommunications Industry.
ECHO STOPPER™ LINE IMPEDANCE MATCHER - ADJUSTS THE IMPEDANCE!
Echo Stopper™
Adjustable Line Impedance Matcher
Matches telephone equipment
to the phone line to reduce echo
and fix DTMF recognition problems.
Makes up for impedance mismatches between the phone line and the trunk card's hybrid transformer.
Stops Echo on VoIP Phone Systems!
The Echo Stopper™ Adjustable Line Impedance Matcher changes the impedance from about 600 to 1200 ohms, depending on which way the Red Range Switch is pushed, and how you adjust the recessed POT.
If you always hear echo on every call, and you don't
hear echo using your Butt-set, there's a 99% chance
the Echo Stopper™ will eliminate the echo.
That's it!
The Echo Stopper™ enables a technician to adjust the impedance of a phone line to match the hybrid transformer on the CO line card on a phone system. VoIP phone systems are most likely to have echo problems because of the time it takes to convert analog to VoIP packets.
Cellular to POTS adapters (like Telular®) also have a lot of delay, and are likely to have echo if there's an impedance mismatch that's greater than the built-in echo canceller can handle.
Because the technician can adjust the Echo Stopper™, impedance mismatches caused by improperly placed load coils can be adjusted to make the telephone system's hybrid as efficient as possible, reducing reflected signals and echo. It's difficult to detect improperly placed load coils, and most phone companies will ignore a trouble call like this.
Since DTMF digits are easily distorted by impedance mismatches, the technician may be able to improve DTMF digit recognition on automated attendants and voice mail systems with the Echo Stopper™.
If you can reproduce the echo or DTMF digit recognition problems, you should be
able to determine if the Echo Stopper™ will help in minutes.
To use the Echo Stopper™, the technician must be able to reproduce the echo. If the echo is intermittent, it probably can't be fixed by the Echo Stopper™ since it's either coming from the other end of the call, or caused by the lack of echo cancellers on only some trunks in the CO. When you hit a trunk in the CO without an echo canceller, you hear echo on that call. There's nothing that a technician can do to fix that problem, unless the phone company will help (unlikely!).
The technician can listen for the echo by either calling in to the system from another line, or using a phone on the system to call out. The technician simply tries the Echo Stopper™ on the line being tested by putting it in-series and adjusting the POT until the echo goes away. If the echo doesn't go away, just hit the Red Range Switch, and try adjusting the POT again. It's modular in and out (direction doesn't matter, use either mod jack).
The Echo Stopper™ comes with a 2 foot solid copper mod cord which can be cut, and punched down on a 66 or 110 block.
In the old days, telephone system manufacturers often put jumpers on the trunk card, or allowed the technician to choose a 600 or 900 ohm termination in programming to match the impedance of the phone line. Many manufacturers have stopped giving technicians that option, which has made it impossible to get rid of problems caused by the impedance mismatch.
Today, simply choosing 600 or 900 ohms may not be enough. If there are improperly placed load coils on a line, it might take 850 or 1150 ohms to best match the impedance of the line to the phone system's hybrid. The Echo Stopper's™ patent pending technology lets the technician adjust for the closest impedance match, giving you the best shot at eliminating echo and DTMF problems.
There are no testers that are easily used in the field to allow a technician to determine the impedance of the telephone line or CPE equipment. The quick test is to put the Echo Stopper™ in-series with the telephone line or analog station port, then adjust the POT/Range Switch to see if your problem clears.
Changing the impedance of the line can correct quite a few problems:
- DTMF Recognition Problems
- Volume Problems
- Distortion Problems (funny sounding voice)
- Echo Problems
- Modem Speed or Connection Problems
- Cellular to POTS adapters (like Telular®)
The Echo Stopper™ isn't Magic... But it's Close!
The Echo Stopper™ is not an echo canceller, which is usually built-into VoIP phone systems. The Echo Stopper™ changes the impedance of the line before it gets into the phone system, which reduces audio that's reflected by the hybrid (that causes echo). There's only so much echo that a phone system's echo canceller will eliminate. If you hear echo for the first second or two of a call, the built-in echo canceller is training itself. Using the Echo Stopper™ in-front of the phone system can reduce echo to the point where the built-in echo canceler can work.
IMPORTANT NOTE: A customer called and said that on the Mitel systems he works on there's an Auto, 600 and 900 impedance setting. None of those settings work for him on that system, but he said he learned to set it at 600 ohms and let the Echo Stopper match the impedance of the line to the trunk card in the system. He said not to leave it on Auto! He said it takes about 20 seconds after going off hook for the echo to go away using the Echo Stopper if the system is set to Auto.
If you'd like more information on how the impedance of the phone system, analog station port or phone line can cause problems, see our Echo Elimination and DTMF Problem Tech Bulletin.
Keep an Echo Stopper™ in your case...
It will only take you a few minutes to try it, and there's
no way to know if it will work if you don't try it!
Pots 66 Block Bridge
ECHO STOPPE
$49.95 Quantity Pricing Available66 Block Dimensions
Wiring a 66 block with Category 5 unshielded twisted-pair cable requires a different termination method not typically used with voice-grade cables.
Robert Y. Faber, Jr.
RCDD
Valerie Smith
EE
The Siemon Co.
Problem
Wiring a 66 block with Category 5 unshielded twisted-pair cable requires a different termination method not typically used with voice-grade cables.
Solution
Pots 66 Block Covers
The following procedure will help ensure that the pair untwist of any twisted pair of conductors will be less than or equal to the 0.5-inch requirement of the Telecommunications Industry Association/Electronic Industries Association 568A standard.
Procedure
Pots 66 Block And Mortar
1) Mount the 66-style block`s bracket on a properly prepared plywood wall surface or a crossconnect frame. This bracket is useful for cable management and slack storage.
2) Route the cables through the bracket and distribute them evenly to the left and right sides--for example, six 4-pair cables per side.
3) Snap the 66-style connecting block onto the bracket.
4) Remove only as much cable jacket as necessary to terminate the cable conductors. Remember to leave some cable slack behind the block and bracket for future reterminations.
5) Dress the cable pairs through the fanning-strip slots as pairs. Both conductors of each pair should be inserted through the same slot in the fanning strip.
6) Once the conductors are inside the block`s fanning strip, split the two apart and terminate them onto the clips. Be careful not to untwist the cable pairs more than 0.5 inch for Category 5 cables (and no more than 1.0 inch for Category 4 cables).
7) When dressing cable pairs through the fanning strips, alternate slots so that the first pair is pulled through the first slot. Skip the second slot, and pull the second pair through the third slot, and so on. The alternate, empty slots may be used for crossconnect wire.
8) Inspect the cable pairs before terminating.
9) Terminate the conductors using an automatic impact tool. Less expensive nonimpact tools are also available.
10) Labeling may be done on the connecting-block fanning strips, add-on designation strips or cover.
Robert Y. Faber, Jr., RCDD, is a corporate trainer.
Valerie Smith, EE, is an electrical engineer at The Siemon Co., Watertown, CT.