atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services Telecom Service & Providers Duel Service again

When we provide dual service, both lines must share the same calling features. If you assign the call forwarding feature, and they activate it, they forward both lines simotaniously. That's the only setback I can think of.

I don't get it. These buildings are 40 yards apart tops. Instead of one guy half tapping the lines at the pole, they will turn them off at the CO and have 4 guys on site to track new pairs to the new building. They had 4 guys there today to get two lines in for the alarm circuits for the sprinkler system so they could get an occupancy permit. But at least it only took them 3 hours.
Makes me crazy.

I know, a half tap only takes a few minutes, and it's only temporary... :bang:

Problem being is that dual service is just not a matter of half tapping the cable. If the entire copper loop is short enough that COULD be done but the proper way to have two locations operating in parallel is to employ a device called a bridge lifter at the C.O. Bridge lifters ain’t been manufactured in a long, long time… Many C.O. locations just cain’t get ‘em anymore.

If they're close together a bridge lifter wouldn't be needed and I fully agree the tap is done in the CO, not the field, unless of course they are so close that when all is said and done they are using the same pairs. Like Bryan said though, if the two locations are opposite directions of the CO and a long ways apart you need bridge lifters, or else you'll have ringing and volume problems. Just wanted to add, around here as high as the loop current is, they'd probably be fine even if they were 5 miles apart! :shrug:

Those a good points. I agree that without the bridge lifters, the farther the distance..the more problems with ringing and volume.

Hmmm...I know it's impossible right now..but if there was a way to call a line, the call rings that line, while simotaniously forwarding to a second line...kinda like an automatic/forced 3-way call...maybe someday. (Pay no attention, I just think of crazy stuff like this from time to time...) We have something kinda like that here, but it's completely isolated and dedicated...we call it a "crash-conference" (Tellabs), but the lines are strictly dedicated to the same conference group (you cannot bridge into it from an outside line, and the members cannot recieve or place calls to other lines).

Bridge lifters are a little simpler than that. When you go off hook the current flow goes in that direction and "lifts" the other leg off. The one's I've seen and wired look a lot like a private line data bridge. We used them a lot when we went from 8 party lines to 2 party where the 2 party's were in different directions. What's an 8 party line you say! :confused: I think there may still be some two's around.

Never seen one, but I've heard the term "party lines" something about a shared a line with two to ten to twenty people...You could talk only five minutes or so before someone else wanted to make a call?

Sorry, I'm wandering off topic again...But I'm still surprised that it seems to be getting harder and harder to receive dual service.

These buildings are separated by a small parking lot, not more then 40 yards and on the same pole. The trouble is, you talk to someone in Pittsburgh for a job in Newark De. They don't want to hear it, it can't be done.

Mark:

I feel your pain in dealing with the devil. What I have seen done, especially in situations like this, is to have them install a new group of numbers at the new location. Before this is done, have them add call forwarding on the main number at the old location. When you are ready to roll, you simply activate call forwarding to the new number at the other side. After this is done and the move is complete, have them change the numbers at the new site to the old numbers.

True, they will totally F that up too, but at least there will be service working at both locations for your part of things so you can get paid for the work that you did.