Cisco IP Phone Poe 7821 CP-7821 Corporate Office VoIP Handset_ Warranty: 24 Months (Simpletek) Purchase invoice: must be requested at the same time as the order and will be sent via email. In the absence of billing data, a receipt will be issued which cannot be cancelled. [Attention: we are not responsible for the configuration and/or installation of the device, the hardware is supplied FORMATTED, the configuration is the responsibility of the buyer, please inquire before purchasing] Call transfer capacity: Yes Possibility of telephone conference: Yes Integrated voice mailbox: Yes G.711a,G.722,G.729A,G.729B,iLBC Ethernet LAN connection: Yes Supported network protocols IEEE 802.3, IEEE 802.3u, IEEE 802.3af Quality of Service (QoS) Support: Yes Supported security algorithms Ethernet LAN p.
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