The 792x family of wireless phones provides a myriad of protocol and security support configurations.
Supported Protocols, Specifications, and Certifications
The Cisco 792x wireless phones support the following protocols:
■ 802.11a/b/g.
■ Skinny Client Control Protocol (SCCP).
■ Real Time Protocol (RTP).
■ G.711u-law, G.711a-law, G.729a, G.729ab, G.722, and iLBC.
■ Real Time Control Protocol (RTCP).
■ Cisco Discovery Protocol (CDP).
■ Syslog.
■ Cisco Compatible Extension (CCX) v4.
■ Wi-Fi Multimedia (WMM) and Traffic Specification (TSPEC).
■ Unscheduled Auto Power Save Delivery (U-APSD) and Power Save Poll (PS-POLL).
■ Bluetooth 2.0—7925 only.
■ IP54 rated—Protects from dust, being splashed by liquid, and moisture. 7925 only. Security
The 792x phones support an array of wireless authentication types, key-management types, and encryption methods.
The supported authentications are as follows:
■ Extensible Authentication Protocol-Flexible Authentication via Secure Tunneling (EAP-FAST)
■ Extensible Authentication Protocol Transport Layer Security (EAP-TLS)
■ Protected Extensible Authentication Protocol (PEAP)
■ Lightweight access point (LEAP)
■ Open and Shared Key
The support key-managements are as follows:
■ Cisco Centralized Key Management (CCKM)
■ 802.11i 802.1x authentication
■ 802.11i Pre-Shared Key (PSK)
The supported encryptions are as follows:
■ Advanced Encryption Standard (AES)
■ Temporal Key Integrity Protocol (TKIP)/Message Integrity Check (MIC)
■ WEP—40 and 128 bit
The 792x phones support the following voice security methods:
■ Certificates
■ Image authentication
■ Device authentication
■ File authentication
■ Signaling authentication
■ Secure Cisco Unified SRST
■ Media encryption using Secure Real-time Transport Protocol (SRTP)
■ Signaling encryption (Transport Layer Security [TLS])
■ Certificate authority proxy function (CAPF)
■ Secure profiles
■ Encrypted configuration files
■ Settings access (can limit user access to configuration menus)
■ Locked network profiles
■ Administrator password
Coexistence
Coexistence refers to using the Bluetooth feature of the 7925 along with 802.11b/g radio simultaneously. Because both Bluetooth and 802.11b/g utilize the 2.4GHz spectrum, you have deployment considerations and limitations:
■ Capacity: Up to two bidirectional RTP streams per AP/channel are supported.
■ Battery Life: There can be up to 50 percent reduction of battery life when on a call and using coexistence.
■ Multicast audio: Multicast audio from Push To Talk (PTT), Music on Hold (MMOH), and other applications are not supported when using coexistence.
■ Data Rate Configuration: It is advised to only enable 802.11g Orthogonal frequency-division multiplexing (OFDM) data rates (that is, > 12 Mbps) to prevent engaging in Clear To Send (CTS) for 802.11g protection, which can impact voice quality.
