[asterisk-users] Help With Physical Layer

[Tony Kasule]

Hi Dale,

Yes, I tried a cross-over cable, I also tried terminated a new E1- cable
with only PINS 1-2 and 4-5 but still no luck. Everything I tried, I would
replicate with the other telco's setup  and results would be positive.

I have a feeling this new telco brought a new model of a RAD modem that
somehow doesn't work with our cards but am struggling to find the technical
reasons (and possible fixes) to support that hypothesis.

On Tue, Jun 30, 2015 at 1:43 PM, Dale Noll <dnoll at wi.rr.com> wrote:

>
> On Tue, Jun 30, 2015 at 3:34 AM, Tony Kasule <timotsmith at gmail.com> wrote:
>
>> Hello,
>>
>> Anyone to help me with this issue? It has never worked :(
>>
>> On Wed, May 20, 2015 at 11:34 AM, Tony Kasule <timotsmith at gmail.com>
>> wrote:
>>
>>> Hello users,
>>>
>>> I have a Digium Te235 and asterisk 13  which have worked well with 1
>>> carrier but we have failed to add a 2nd carrier. The second telco brings
>>> their E1 line over finer, terminated in a RAD modem and they give me
>>> ethernet to the E1 card. It's the first time i am having install such a
>>> solution, which ideally would be not a big problem.
>>>
>>> However, The  physical layer has failed to come up! I have tried the
>>> same setup in an Alcatel OmniOCX and it works well. I can confirm that the
>>> port is also well configured because when I interchange the cables (with
>>> the exiting cable from the other telco), the alarm clears emmediately for
>>> the 1st telco and becomes RED for the 2nd telco. A loop also clears the
>>> alarm on both ports.
>>>
>>> The telco has told me to make sure that Line Impedance is 120 ohms but
>>> There's no where to set that and when I was reading, I was told that E1 is
>>> already 120 ohms so no need to change anything.
>>>
>>> Has anyone here experienced this?  What other things can I try?
>>>
>>> Thank you!
>>>
>>> Regards,
>>> Tim
>>>
>>
>>
> Have you tried a E-1 Cross Over cable from your RAD modem to the Digium
> card?
>
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