Opus Business System Ltd. | Address: City Office & Showroom, 41, Hoxton Square, London N1 6PB, United Kingdom 
www.opus-telecom.co.uk | Phone: +44-(20)-7324 7000
Opus Business System Ltd supplies telephone system. We specialize in computer telephony integration, video conferencing, voice over IP and least cost routing. Our product includes aastra, intertel and more...