We can install and maintain:
 
Analogue lines – allow one incoming or outgoing call at any one time, for voice calls, fax or broadband.
Multi lines – for a collection of analogue lines on the same number, usually connected to a phone system and allowing more concurrent calls.
ISDN2 is a 2-channel digital line that can be used for voice, data, video or fax, and can allocate separate phone numbers to users.
ISDN30 is like ISDN2 but supports between 8 and 30 channels.