Cisco EM2-HDA-4FXO - 4-port voice/fax expansion module - FXO Cisco Router Network Module Retail $249.00
Cisco EM-HDA-6FXO - 6-port voice/fax expansion module - FXO Cisco Router Network Module Retail $99.00
Cisco EM-HDA-8FXS - 8-port voice/fax expansion module - FXS Cisco Router Network Module Retail $129.00
Cisco EM-4BRI-NT/TE - 4-port voice/fax expansion module - BRI (NT and TE) Cisco Router Network Module Retail $699.00