How can I fix my internal phone line?

Just buy a new telephone cord. If in the UK it needs an RJ11 plug at one end and a BT plug at then other e.g. cgi.ebay.co.uk/Cable-BT-Phone-Plug-to-RJ11-Standard-Modem-Lead-10M_W0QQitemZ370166798633QQcmdZViewItemQQptZUK_Computing_CablesConnectors_RL?hash=item370166798633&_trksid=p3286.c0.m14&_trkparms=72%3A1690|66%3A2|65%3A12|39%3A1|240%3A1318

If in the US, RJ11 to RJ11.

T
March 2009