Sadiq Ahmed KHan, Syed Manzar Ali, Saif-ur- Rehman Khan & Hera Batool Musvi VoIP Gateway Connectivity Through PSTN - Karachi: UIT, 2005 Standard No.: 05B-058-TE, 05B-071-TE, 05B-069-TE & 05B-074-TE Subjects--Personal Names: Telecommunication Engineering Subjects--Topical Terms: Bachelor of Engineering (BE)