16-06-2021 02:47 PM
I am struggling to connect my gateway to a BT ASDH NTE 4U/7A. This is providing a Q.931 ISDN service.
My gateway installation manual says I need to make a 120 ohm crossover cable using Cat5 and RJ45/RJ48 connector by termianating as follows:
Pin 1---Pin 4
Pin 2---Pin 5
Pin 4---Pin 1
Pin 5---Pin 2
So I made the cable up and there isn't a Layer 1 link (customer LED is amber and not off). I have tried a straight through cable, still nothing
I have another E1 link to a different BT ISDN unit (NTE 2D) and this connects fine to my other gateway which is exactly the same as my first gateway with exactly the same config but via a straight through patch cord.
Can anyone advise if I need to use a special cable or a special pin out to interface to a BT ASDH NTE 4U/7A, or if there is an instalaltion manual/datasheet for it please?
Thanks in advance!
Apologies for the late reply - did you manage to get this one sorted? If not, please privately message me so I can take some details and have a look. Hopefully all is well now.