This module includes:

• 3 CO line ports
• 8 ETR station ports
• 2 Power Failure Transfer ports
• Compatible with caller ID
• Compatible with Partner ACS R3.0 or higher
• Needed for fax detection and call routing
• The universal port structure of the Partner 308 EC expansion module allows multi-line analog phones or single line business phone systems.
• Analog Device Compatability (fax machine, credit card machine, modems, and more..)