tn754b-v16

[adh111681]

we have 8 tn754b-v16's that won't pick up lines, we've tested them before, but now none of them work. A tn754b-v4 will though, any ideas??

 

[dimas]

Hi
Wich type of terminals you try to connect?
What you see?

 

[adh111681]

we are trying to connect 7406+ and 8410d's

 

[dimas]

And what about
status station xxx
?

 

[adh111681]

My service status is showing disconnected?? What have I done ???

 

[andiesue]

The TN754 is a 4 wire digital pack. It should work with the 7406 phones. 8410s are two wire digital and will not work with a TN754.

 

[andiesue]

another thought. you may want to check the cross connect wiring. The 7406 4 wire uses the orange and green pairs, while 8400 series 2 wire digital only uses the blue pair.

 

[adh111681]

we are using a 7406 and it's still not coming up.

 

[adh111681]

I don't think it's a cross connect issue. Let me paint the picture a little clearer. I have a Definity G3V6 wired into my patch panel for testing phones, I also have 8 empty slots programmed for different circuit packs for testing purposes. My slots to my patch panel have TN754b-V4's in them. My empty slot is a general TN754b slot. If I take my V4 out and put it in my test slot , it works fine on the 7406 and brings up my line. When I put a V16 in, it won't pick up the line. When I do a status station with the V4 it says in service/on hook;when I stat st with the V16 it says disconnected.But if I put the V16 in my V4 slot it works fine.What am I missing???The strange part is I've tested them before in this slot and they worked fine!!!

 

[dimas]

It may conflict of circuit pack when you insert V16. Try command display circuit-pack to
check does your switch found new board or it show V16 as V4.
And check display alarm too.

 

[dimas]

Be shure, 8410 must work with TN754B by 4-wire and with TN2181 by 2-wire
( It is universal phone).

 

[adh111681]

The switch does see it as a V16. Yet, still no line to pick up. No alarms.

 

[dimas]

1.Do you see the lights on LEDs anywhere on phone when new board inserted?
2.May be Definity wants absolutly removing translation from new slot before inserting the new board,
may be you have activated some features with old board (night, trunk-ns, hunt-ns ...) and conflict in this.

 

[adh111681]

I completely removed the programming on the slot and reprogrammed it with the V16, still no luck.

 

[dimas]

But in other slot this board (v16) is working?
- Magic!

 

[Guest_imported]

disconnect status w/ a 754 is usually a x-connect problem. check MDF's, IDF's, and evev the jack at station.everything should be straight thru. If you punch a jack straight off of the 110 or 66 block ( depending what you use) from your switch you would know if it is a witre problem or a tranlation problem.

 

[steveave]

Did you verify the wiring on your patch panel is 568B.