atcomsystems.ca/forum Forums TDM Business Telephone Systems Samsung Telephones & Systems No "D" channel on 7200 TEPRIa

Thanks for the sheet info Noisycow, but unfortunately that is the old sheet we have.

There are NO dip switches on this TEPRIa card, only a J1 and J2, nothing else. Both the IT guy and I have gone over the card with our noses an inch away and glasses on and there are no dip switches on this 7000 series card.

As we don't have a re-cut scheduled, the card was sent back to the distributor who has kindly agreed to put it in their system to test.

One thing TP did say is that they could put in a different model Adtran but they wanted $250 to reconfigure it. I could get a call to my cell phone from the Adtran using a T-Berd but that doesn't mean something wasn't incompatible with the "D" channel and the new style TEPRIa card.

You would think that TelePacific and other carriers would keep a database of successful cuts where specs would be kept that this model Adtran worked with this model Samsung and this model Adtran DID NOT work with this model Samsung, same with Toshiba, Nortel, etc.

I usually use an Adtran Ace on a full circuit but in this case it would be selling an Adtran Ace to monitor an Adtran PRI box and I couldn't justify that.

Thanks, sooner or later we will get this puppy up.

Have you tried a T-1 crossover cable?

Good catch on that one bmreen.

I am confused Bunnie. The latest and greatest TEPRIa cards have those TINY dip settings. I've configured four myself in the last week. I am unaware of any current TEPRIa card for the 7000 series that does not have those eight dip switches. They are hard to see - very tiny. So tiny I use TWO reading glasses to set the damn things!!!

T-1 crossover - one of my pet peeves!! Why can't they just make interfaces for a straight cat5 patch cord that is handy at every site? Just dumb.

If when you plug in the cable you see the lights change such as the ref clock, but not a D-channel it is not the cable. If the cable is pinned wrong you typically will see no change.

We did try a cross over cable and that didn't help.

But the situation is solved. We sent the card back and no, it is not defective. The distributor's tech informed us that there is a plastic cover and the dip switches are itsy-bitsy.

An IT guy of at least 40 years experience, me, my partner and the Telepacific guy all looked for the dip switches and none of us could find them.

The manual said they were there but we couldn't find them. Thanks for saying they are TINY Noisycow, they are so well hidden we had to conclude we had a newer card. I mean I want to see those dip switches, if four experienced techs can't find them with a manual, I say revise the manual.

Thank you everyone for your help, I'm not usually stumped but having TINY dip switches covered by plastic is not what I would have suspected.

And speaking of crossover cables Noisycow, I just moved a Norstar MICS and the previous CLEC required a T-1 crossover cable for the PRI and Verizon required a straight through, now how do you figure that?

Great to hear Bunnie! Yeah not only are they TINY, they have a plastic coating over them. That makes it hard to see how they are set. I miss the old days where the dip/pins were big and right on the front of the card.

The good news is we have never seen a bad card - it is always something configured wrong.

People shouldn't confuse a T-1 crossover cable with an ethernet crossover cable. When we make T-1 crossover cables we put black electric tape around each end to make it obvious.

Bunny for your info I have never had to change those dip switches for a PRI circuit. Only when using a T-1.

Telcom - we have received two cards with the dips changed to something different, even with the plastic coating undisturbed, so it is always worth checking.

Just fire it up with the card installed, go into the number plan 7XX and see if it thinks it is a PRI23 or T124. My lazy way of finding out for sure without getting out the double reading glasses!

We've had TEPRIa cards before for the 7100 and never had a problem. This was a 7200 install and I have never seen dip switches this small in my life.

We had a print that talked about the dipswitches and the Telepacific guy, the really smart on site IT guy, Paige and I all looked for the dip switches and NONE of us found them.

When we read about the dip switches being tiny and covered with plastic we realized how we missed them.

Is there some reason they would be covered with plastic? I can understand Korea would put in tiny, tiny dip switches to save money, but to cover them with plastic? It is not like you would spill Coke into the board inside the system.

And our distributor for sure verified that the setting was incorrect when we got the card. We couldn't even find them to change them to the wrong setting.

Hopefully this thread will help other people in the future if they have no D channel as we did.

(Or rather didn't have.)

Just saw this post, wished I would have got in sooner... I had the exact same problem on my 7400 system on a TEPRI2 card, the dip switches are coated with dark coated plastic (not sure why, dust should not affect the switch), after I finally found them, configured them properly and my D channel started working.

Jimmy