Telephone Protocols - SERIES 1500 / 1500i (PDF)

SERIES 1500 / 1500i (PDF)
... system is fully compatible with standard telephone protocols ...

Appendix B - Telphone Protocols, A State Survey on Racial and Ethnic Classifications
... Appendix B Telephone. Protocols. Full Report (PDF) Appendix B Telephone Protocols. Protocol for Telephone Interview State Survey on Racial and Ethnic Classifications ...