Cisco 7920 IP - Manuals

Technical Assistance Center (TAC) (if problems arise) is limited for this situation. Security for the Cisco 7920 and WLAN Networks The Cisco 7920 is supported in the architecture of the Cisco Wireless Security Suite. The architecture is discussed in detail in documents for Wireless LAN Security Solu...

RADIUS functionality in a small office, but could also be used as a ACS server in case of WANfailure. The following is a step−by−step example of configuring the fallback RADIUS server for LEAPauthentication: Configure the Network Access Server (NAS), by issuing the following commands: radius−server ...

All of the above calculations and design recommendations are based on VAD being disabled on the Cisco7920 IP Phones. VAD is a mechanism in VoIP where no RTP packets are sent if no speech is occurringduring the conversation. VAD can be enabled on the Cisco 7920 phones and provides some bandwidth cons...

30 AP limit is due to memory and processor constraints on the Wireless Domain Server (WDS), which is APfunctionality to provide this enhanced roaming and security. This functionality is introduced into Cisco IOSSoftware Release 11.2(11)JA on the Cisco APs. Deployments that do not require this functi...

Note: Any references to roam or roaming throughout the remainder of this document is in the contextof mid−call roaming. As it relates to roaming, the Cisco 7920 IP Phone currently only supports Layer 2 roaming. This means that aCisco 7920 IP Phone can roam between APs that have coverage for a single...

Layer 2 roaming with both static WEP and LEAP has been shown to provide acceptable QoS using eitherG.711 or G.729. If LEAP is being used, it is recommended that users are defined locally on the ACS server.This is because using off−box databases have potentially unknown response times, which could ad...

VLANs VLANs are used by WLAN networks to provide two distinct functions: Segment traffic into distinct broadcast domains (IP subnets). • Create separate security domains for different security models (such as open, WEP, LEAP, ProtectedExtensible Authentication Protocol (PEAP), EAP Transport Layer Se...

For more details on deploying VLANs in WLAN networks, refer to the Wireless Virtual LAN DeploymentGuide. WLAN QoS for VoIP As mentioned earlier, WLANs operate as a shared medium. This means that QoS on WLAN networks aremore difficult than wired networks because end points do not have dedicated bandw...

The following is an example of configuring the QBBS element in beacons on Cisco IOS Software−based APs: Beyond just having queuing and setting packets with the correct DiffServ markings, delay and jitter need to betaken into consideration. This is especially true for upstream traffic since there is ...

Disable Port Aggregation Protocol (PagP) − PagP is enabled by default, but it is not needed foruser−facing ports. • Enable Port Fast Allows a switch to quickly resume forwarding traffic if a Spanning Tree Protocol(STP) link goes down. • Configure Wireless VLAN Creates a unique wireless VLAN that iso...

Cisco Emergency Responder can query for IP Phones through either CDP (on the Catalyst switches)or the MAC address. Since CDP is sent as a link−layer multicast and is used by the Cisco AP todetermine the QoS settings for the Cisco 7920, it is not propagated up to the Catalyst switch. Thismeans that C...

Call Admission Control Call Admission Control (CAC) provides the mechanism that prevents the presence of the next voice call tointerrupt or provide poor QoS for all existing voice calls. Regarding Time−Division Multiplex (TDM), this isaccomplished by a finite number of DS0 channels. In wired Etherne...

Cisco 7920 does not support network−based directories. This will be supported in future softwarereleases. • Cisco 7920 does not support XML−based applications. This will be supported in future softwarereleases. • Related Information Voice Technologies • Voice, Telephony and Messaging Devices • Voice...