Bugging

• TSCM - Counterintelligence and Technical Security
• TSCM.COM - Phone Bugging and Modifications

Dialers

• GMA Communications

Equipment

• Telephone and accessory installation guide 
• Yahoo! - Equipment 

Hardware

• ComShare Telephone Line Sharing Devices
• HOME TEAM - communications equipment
• HomeTech Solutions - Home Automation, Security, X10, Leviton, Audio/Video
• J. Talon Associates
• Lynx Automation - manufacturer of FAX switches, distinctive ringing equipment, telephone line sharing devices. 
• High-Tech Mall Telephones Links

 

PABX

• GMA Communications

Wiring

• Data Communications Cabling FAQ
• Futuristic Cabling - Connecting You to the Future
• HOME TEAM: Home Networks: Telephone Wiring
• premise tel. wiring
• Residential Telecommunications Wiring Primer - HomeTech Solutions
• VICNET Help Sheet 10: PABX and Telephone Line Problems - home and office.
• Yost Serial Device Wiring Standard