Re: E1 interface

Hi,

The answer lies in the controller output.

AIS = Alarm Indication Signal.

This is generated towards all ports, effectively its all 1's, and tells
the receiver not to use the E1 for clocking purposes as it has a problem.

The problem is upstream and is typically caused by a higher order
failure or open circuit. Now this could be the radio itself, if it isn't
receiving the signal from the far end, or it could be the SDH or PDH
(older) network that the far end connects to.

The best way to test this out is by loops. Loop the local end, if AIS
clears then put the circuit back through and loop on the trib at the far
end of the radio. If this works, put it back through and keep going up
the network till you find it.

Note that if the radio system provides a true 2Meg path it does not
matter if you run framed or unframed on the controller for test purposes
to a loop.
Also remember that you can run a BERT from the command line on the
router and send a PRBS test signal around the loop.

regards Andy

Abiola Jewoola wrote:
> The radio is actuall a radwin unlicensed radio.with an E1 interface.
>
> I dont knw if u any idea abt the default e1 settings for this radio.
>
>
> --- On Tue, 9/14/10, Radioactive Frog <pbhatkoti_at_gmail.com> wrote:
>
>
> From: Radioactive Frog <pbhatkoti_at_gmail.com>
> Subject: Re: E1 interface
> To: "Abiola Jewoola" <biola_y2k_at_yahoo.com>
> Cc: ccielab_at_groupstudy.com
> Date: Tuesday, September 14, 2010, 6:10 AM
>
>
> Ask radio guy if the provided E1 is framed or unframed.
> If radio output is E1 framed then your config is correct and make sure they
> have timeslot 1-31 in radio. In this instance your E1 controller won't come up
> till you plug-in another router at other side of radio link.
>
> If radio link is E1 unframed, they you can do either config - framed or
> unframed. as long as it matches at both end you should be okay.
>
> BTW which backhaul radio they are using? - i have extensive experience with a
> few teleco grade radio vendor. can guide you if you still searching for
> answer!!
>
> good luck
>
> frog
>
>
> On Tue, Sep 14, 2010 at 7:48 PM, Abiola Jewoola <biola_y2k_at_yahoo.com> wrote:
>
> hello GS
>
> i have a VWIC-1MFT-E1 card installed on a 3700 series router which is to be
> connected to an E1 radio for data traffic . i have done the initial config in
> bringing the E1 card up
>
>
> But the E1 interface is still down
>
> controller E1 1/0
> framing crc4
> linecode hdb3
> channel-group 0 timeslots 1-31
> no shut
>
>
> i can see the serial interface when i do sh ip int bri and sh ver
>
> Any ideas as to why d e1 int is down?
>
>
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Received on Tue Sep 14 2010 - 22:32:24 ART