گوشی آی پی فون سیسکو SPA501G 8-Line

Eight voice lines IP Phone
Four Independent SIP Registrations
Line status: active line indication
User interface driven by Interactive Voice Response (IVR)
Shared line appearance
Speakerphone
Call hold
Music on hold
Call waiting
Outbound caller ID blocking
Call transfer: attended and blind
Three-way call conferencing with local mixing
Multiparty conferencing via external conference bridge
Automatic redial of last calling and last called numbers
Audio mute on/off
Headset on/off
Voicemail message waiting indicator (VMWI) light
Voicemail message retrieval button
Dedicated hold button
Settings button for access to IVR menu
Password-protected system, preset to factory default
Password-protected access to administrator and user-level features
HTTPS with factory-installed client certificate