Avaya IP500 V2 - ETR Port

IP500/IP500 V2 Installation Page 383
15-601042 Issue 25i (03 January 2013)IP Office 8.0
System Components: Physical Ports
9.16.10 ETR Port
ETR (Enhanced Tip and Ring) ports are provided by the ETR6 base card. They can be used for the connection of DTMF
analog phone devices and Avaya ETR phones.