Samsung telephone system not making calls

DARRON requested 3 quotes from Telephone Systems Professionals in Thomastown

samsung telephone system can receive calls but can not make calls. lines have been checked by telstra; all working fine.

KAD Electrical - DNC

Phone line to be connected to main line. socket to be replaced
Phone line was with optus (coaxial connection) Telstra have re established...

Central Phone filter Installed
Central Phone Filter Installed { For ADSL BROAD BAND}

Cabling
computer Network cabling