Cisco Systems 7920 IP manual Connecting APs to the Catalyst 3550 SMI or EMI

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∙Disable Port Aggregation Protocol (PagP) − PagP is enabled by default, but it is not needed for user−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 isolates wireless traffic from other data, voice, and management VLANs, thereby isolating traffic and ensuring greater control of traffic.

∙Enable QoS, and Do not Trust the Port (mark down to 0) ￿ Ensures appropriate treatment of high priority traffic, including soft phones, and prevents users from consuming excessive bandwidth by re−configuring their PCs.

Connecting APs to the Catalyst 3550 SMI or EMI

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] mls qos

auto qos voip trust

mls qos map cos−dscp 0 10 18 26 34 46 48 56

mls qos aggregate−police AGG−POL−5M−DEFAULT 5000000 8000 exceed−action drop class−map match−any EGRESS−DSCP−0

match ip dscp 0

class−map match−any EGRESS−DSCP−10 match ip dscp 10

class−map match−any EGRESS−DSCP−56 match ip dscp 56

class−map match−any EGRESS−DSCP−26 match ip dscp 26

class−map match−any EGRESS−DSCP−18 match ip dscp 18

class−map match−any EGRESS−DSCP−48 match ip dscp 48

!

policy−map EGRESS−POLICING class EGRESS−DSCP−0

police aggregate AGG−POL−5M−DEFAULT class EGRESS−DSCP−10

police aggregate AGG−POL−5M−DEFAULT class EGRESS−DSCP−18

police aggregate AGG−POL−5M−DEFAULT class EGRESS−DSCP−34

police aggregate AGG−POL−5M−DEFAULT class EGRESS−DSCP−48

police aggregate AGG−POL−5M−DEFAULT class EGRESS−DSCP−56

police aggregate AGG−POL−5M−DEFAULT

!

interface [interface id]

description 11m Towards Wireless Access Point no ip address

mls qos monitor dscp 0 10 18 26 34 46 48 56 service−policy output EGRESS−POLICING

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

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Contents Table of Contents Requirements IntroductionPrerequisites Cisco 7920 IP Phone Overview Wlan OverviewRF Overview Site Surveys and Design Recommendations Components UsedVoIP QoS Rssi∙ Delay Variation Jitter Not to exceed 30ms Security for the Cisco 7920 and Wlan Networks Number of 802.11b IP Phones per AP Network SizingNumber of 802.11b Devices per AP Page Numbers of 802.11b Phones per Layer 2 Subnet or Vlan Understanding Layer 2 and Layer 3 Roaming Understanding Roaming TerminologyLayer 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 EI Connecting APs to the Catalyst 2950 SICaveats and Limitations Other Caveats and Limitations Call Admission ControlDesigning Around the Lack of Layer 3 Roaming 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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