Cisco Syst. 8PORT VOICE/FAX EXPANSION ( EM-HDA-8FXS= )

Cisco PVDM-256K-4= Voice DSP Module

Cisco Systems PVDM-256K-12 Voice DSP Module

Cisco Syst. 4PORT VOICE/FAX EXPANSION ( EM-HDA-4FXO= )

Cisco High Density VoiceFax Network Module – Voice / fax module – plug-in module – expansion slot / 4 analog port(s)

Cisco 8-port Voice/Fax Expansion Module

Cisco 7914 – key expansion module ( CP-7914= )

CISCO 7914 EXPANSION MODULE FOR CISCO IP PHONE