Cisco Systems 7920 IP manual Connecting APs to the Catalyst 2950 EI

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wrr−queue cos−map 4 5 priority−queue out

Connecting APs to the Catalyst 2950 EI

The following configuration is a reference template for use on Catalyst switch ports that are connected to Cisco APs. It provide the required configurations for security, QoS, and STP:

default interface <xx/yy> switchport mode access spanning−tree bpduguard [enable] spanning−tree bpdufilter [enable] no channel−protocol spanning−tree portfast

vlan [vlan id] auto qos voip trust

Connecting APs to the Catalyst 2950 SI

The following configuration is a reference template for use on Catalyst switch ports that are connected to Cisco APs. It provide the required configurations for security, QoS, and STP:

default interface <xx/yy> switchport mode access spanning−tree bpduguard [enable] spanning−tree bpdufilter [enable] no channel−protocol spanning−tree portfast

vlan [vlan id]

Using Cisco Emergency Responder for E911 calls with the Cisco 7920

The Cisco Emergency Responder proactively queries Cisco CallManager for new phone and user login registration events. In response to these events, Cisco Emergency Responder automatically searches known Cisco Catalyst switches in the network and finds the location of the phone and the user, based on the switch port to which the phone is attached (through CDP or the MAC address). This information is then updated in a Cisco Emergency Responder location database, and is used to identify a caller￿s location when an E911 call is placed. With this solution, users can move within a campus or between sites, wherever and whenever they want, without any administrative intervention from the IT organization. This eliminates the administrative costs associated with relocating phones or users, while maintaining accurate and updated location information for E911 state and safety mandates.

Cisco Emergency Responder makes informed inbound and outbound call routing decisions based on the location of emergency callers, and provides crucial location information to emergency operators in Public Safety Answering Points (PSAPs). Outbound emergency calls are directed to a gateway associated with the PSAP that is nearest to the caller, and in the event of an unintentional call disconnect or need for additional information, inbound calls from a PSAP are returned to the original caller.

For more information, refer to product literature for the Cisco Emergency Responder.

For Cisco 7920 phones, several guidelines should be followed to accommodate the roaming nature of 802.11b phones.

Cisco − Wireless IPT Design Guide for the Cisco 7920 IP Phone

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Contents Table of Contents Introduction PrerequisitesRequirements Wlan Overview Cisco 7920 IP Phone OverviewRF Overview Site Surveys and Design Recommendations Components UsedRssi VoIP QoS∙ Delay Variation Jitter Not to exceed 30ms Security for the Cisco 7920 and Wlan Networks Network Sizing Number of 802.11b Devices per APNumber of 802.11b IP Phones per AP Page Numbers of 802.11b Phones per Layer 2 Subnet or Vlan Understanding Roaming Terminology Understanding Layer 2 and Layer 3 RoamingLayer 2 Roaming Page Layer 3 Roaming VLANs Wlan QoS for VoIP Page Page Page Interconnecting WLANs to Cisco Campus Infrastructure Connecting APs to the Catalyst 3550 SMI or EMI Connecting APs to the Catalyst 2950 SI Connecting APs to the Catalyst 2950 EICaveats and Limitations Call Admission Control Designing Around the Lack of Layer 3 RoamingOther Caveats and Limitations Related Information

7920 IP specifications

The Cisco Systems 7920 IP phone represents a significant advancement in wireless communication technology, designed specifically for enterprises that require mobility and efficiency in their communication systems. This versatile device integrates seamlessly into a Cisco IP telephony network, allowing users to maintain connectivity while on the move, which is essential in fast-paced business environments.

One of the key features of the Cisco 7920 is its robust wireless capabilities. Operating on the IEEE 802.11b/g Wi-Fi standards, it provides a reliable connection to corporate networks, ensuring that users can access voice, data, and video services without being tethered to a desk. The phone supports dynamic call handling and features a responsive LCD display that enhances user interaction, making it easier to navigate menus and manage calls.

The Cisco 7920 also offers exceptional sound quality, thanks to its advanced audio technology. With Wideband audio support, users can experience clarity in conversations, which is particularly important in environments where clear communication is vital. The phone is equipped with noise-canceling capabilities that reduce background noise, allowing users to focus on their conversations without distractions.

Security is another critical aspect of the Cisco 7920. The device supports several security protocols, including WPA and WPA2, ensuring that all communications are encrypted and secure. This is crucial for organizations that handle sensitive information and need to comply with industry regulations.

Additionally, the Cisco 7920 features an extended battery life, enabling users to make calls throughout the day without frequent recharging. Its lightweight design and ergonomic build make it comfortable to use for extended periods.

In terms of integration, the Cisco 7920 IP phone is compatible with various Cisco Unified Communications Manager software versions, allowing for easy configuration and management within existing network infrastructures. Its support for multiple languages also makes it a suitable choice for international organizations, accommodating diverse user groups.

Overall, the Cisco Systems 7920 IP phone combines the necessary features, technologies, and characteristics to meet the demands of modern enterprise communication. Its blend of wireless capability, superior audio quality, security measures, and integration versatility makes it an excellent choice for organizations seeking efficient and reliable communication solutions.
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