Quick tech specs
- Voice / fax module
- FXO
- for Cisco 28XX
- 29XX
- 38XX V3PN
- expansion slot
- analog ports: 6
- 28XX V3PN
- 38XX
- 39XX
Know your gear
This 6-port FXO voice and fax expansion module provides off-premises connection to the central office. This module supports FXO power failover. If power to the router fails, this feature helps enable a direct metallic path between an FXO port and a special "red" telephone to provide a direct line to the PSTN.