[Asterisk-Users] Asterisk & Meridian Tie Line

[Johann Steinwendtner]

The BT guy should check LD 73 block LPTI and prompt AFF.
If it is crc then you need crc4 as well.

Best regards

Hans

Steve Totaro schrieb:
> Andy Kirby wrote:
> 
>>
>> I am new to the group but have searched the doc's FAQ's etc before 
>> posting here.
>>
>>  We are attempting tie our asterisk server/service to the building's 
>> PBX, the building is in the UK and the local PBX is a meridian option 
>> 11 installed and mainteined by BT.
>>
>> BT Have installed a NTBK50AA E1-PRI card in the meridian with daughter 
>> cards NTBK51AA (D channel) and NTAK20BD (Clocking)
>>
>>  I have asked BT to configure the card as a Master (Exchange end) E1 
>> Euro ISDN (Just like a standard ISDN30e)
>>
>>  They claim to have done this in line with the model they use to 
>> interface to Cisco routers etc.
>>
>>  I have installed a Digium TE411P in our server looped back the span 2 
>> port (Gives a green light and OK with same config as span 1) and am 
>> using a crossover cable to link the PBX to our server. (We tried a 
>> pucker BT cross over cable with exactly the same results as mine and a 
>> striahgt through gives us nothing at all, I guess as you might expect)
>>
>> I have configured the Zap span for 1 clocking (Primary) 1 line build 
>> out, with the framing etc as CCS, HDB3, CRC4
>>
>>  
>>
>> But they don't appear to want to synchronise/talk to each other.
>>
>>  
>>
>> ZTTool claims that the span is up and down more times than a fiddlers 
>> elbow  and the clocking source is internal.
>>
>>  ( Might I expect the alarm state to be constant if the framing etc 
>> was matched and the clock source to show as external ??)
>>
>>  
>>
>> The alarms are cylcling from red to red/yellow and finaly to 
>> red/yellow/recover before falling back to red and starting again.
>>
>>  I think I may be missing something that is probably blindingly 
>> obvious to someone in the know.
>>
>>  The BT guy has been very good and is trying to help us get this going 
>> but seems rather nonplussed with the terms CRC4, CSS and HDB3...
>>
>> Please can somone help and point me (and I guess by extension the BT 
>> guy) in the right direction.
>>
>>  
>>
>> Cheers
>>
>>  
>>
>> Andy
>>  
>>
> 
> Try your end with every different combination of settings applicable to 
> EuroISDN.  I would start by removing the CRC4.  Try something, if it 
> doesnt work, put it back and change another setting.
> 
>> s
>>   
> 
> 
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