Extek design and manufacture arduous & hazardous area telephones to individual customer specifications.
Documents
- Why VoIP Telephones (14kb PDF)
- LAN Telephone System versus PSTN (22kb PDF)
- LAN Telephone System Networking Protocols (14kb PDF)
- LAN Telephone System Glossary (22kb PDF)
- Protection Rating Incl. NEMA (13kb PDF)
