Hi! First post here. Hope you guys can help. I want to add one of these http://www.smarthome.com/5231/In-line-Telephone-Flashing-Alert-Light/p.aspx inline to my work phone of which is one of those inter office system type phones. PBX perhaps? The cord coming out of the wall is an RJ12 to RJ12 crossed. If I add this flasher does it cross the wires of which they will need to be crossed back or do I then use a straight cord? I have tried to put a coupler inline both crossed and straight and both did not work. My thinking was I could just wire in an led bulb, make my own kind of thing. Any questions please ask. I really need to get this to work. Thanks guys!

You can't use those on a Station Jack, it needs to be on a CO line, You may have an extra pair at your jack that could be tied into the CO line directly bypassing the KSU(Key Service Unit/PBX),
This jack may bypass restrictions placed on that jack or system.
You likley have a pair of connections on the System that could be hooked to a relay and light?
What Phone System do you have?

first, I am so not versed on this stuff so most of that was greek to me haha =) the phone has Macrotel MT-16T on it. I was thinking I could just splice a low wattage led right into the power and common wire of the phone cord from the wall and when I get an outside call or someone has called from inside the system the led would get power and light up. Not the case? Thanks again.

Yonny,

The best solution for you would be to issue a work order for one of the tel-com folks to put the device in.

I appreciate that but I'm a do it yourself kind of guy. Looking for knowledge to be more self sufficient. Thanks anyway =)

Yonny,

I was not commenting on your abilities, I was speaking from a technical viewpoint.

For example, the RJ-12 can be populated by as 8 conductors.

The pin connections are paired and are set up (defined) accordingly. The pairing starts at the center two pins. Then moves upwards and downwards.

Pins 4&5 would be line 1. Pins 3&6 would be line 2. Pins 2&7 would be line 3 and pins 1&8 would be line 4.

That maps to the wiring on the punch-down by the tel-com.

So you absolutely have to have their permission to do a direct connect to their lines because you may be violating their wiring plan.

If you attempt to place the flasher directly on the phone, you may violate the phone manufacturer's warranties.

Unless you are an electronic engineer and can read a chip map you will not be able to determine where to place the flasher circuit.

So again, I suggest you contact the tel-com for your building and get their suggestions or contact the manufacturer of the telephone and see if they already have an approved design that allows for the installation of the flasher.

Being a "DIY" guy is fine but you have to know when to get help from the pros at least at the planning stage.

Once you know what is and is not allowed, then you can do the work if you believe you can do it.

Yonny,

A couple of things.

1) I apologize, I inadvertently gave you the pin configuration for a RJ45 connector. The RJ12 is a three pair (6 pins) connector. The center two pins are Line 1 - R(3) T(4). Line 2 (T) pin 2, (R) pin 4. Line 3 is (T) pin 1 and (R) pin 6.

2) I read the installation instruction guide and all you have to do is plug the phone into the flasher and the flasher into the wall.

If you are in an office and you have multiple lines(a Phone system), then the phone at your desk will plug into a jack AFTER the phone system, these are station jacks, going into the phone system is the CO(Central Office Lines)Lines from the phone company(area code and 7 digits) these co lines are what the flasher will work on, Go to vikingelectronics and I believe they have a flasher or display, that will light for multiple lines, and work on your system, will see if I can find.
You should not modify a system that is not yours as these can be destroyed easily by a lack of knowledge.

Viking Electronics Telecom & Security Products (http://www.vikingelectronics.com/products/search_cat_results.php?mycategory=24)