Random incomming call failing to pickup

Hi,

I have installed and setup AsteriskNow and have been using it for the last year or so and have made quite a nice setup. I have a TDM400 PSTN card with 2 lines (one uses ADSL) and 8 CISCO SIP handsets.

The problem i have in the last 8 months i have had problems with Asterisk seeing an incomming call, no picking up the CID and haning up. The call just keeps rining and rining. I have upgraded the core nad associated modules via the module upgrade and everythng is reporting as ok. Dialplans and outbound calls are ok.

CLI :

starting post polarity CID channel 1
starting simple switch on DAHDI 1/1
hangup DAHDI 1/1

I have read through mounds of associated info and have checked the settinhgs for the region are =uk, and im using kewlstart. I have changed ADSL filters and to see if that is the problem but after nearly a year im getting a bit stuck. Both channels are good and are not in alarm.

The lines come i the building from a overhead cable which was damaged and had a repair done on it so im wondering if it has got a lloose connection.

If anyone can suggest any other stuff i can check i would be appreciated.

PS> i also have a random pearl script error but it seems to be with the GUI… not sure about this as im not good with peral.

Update.

We have rewired the lines and the drop offs seem to have gone so i think it was poor quality phone lines.