Chapter 8 Profile and Web Page Parameters and Defaults

Parameter Details

Table 8-9 ConnectMode Parameter (continued)

Bit

22

23

Description

Process a received = parameter in the VIA header to extract the external IP addresses used by the Network Address Translation (NAT) router.

•0=Disable (default).

•1=Enable.

When a Cisco IP Phone is operating behind a NAT, the NATIP parameter must be set to the external IP address of the NAT router. This setting allows the correct IP address to be placed in the Contact and SDP headers.

You may leave the NATIP address set to the default value of 0 (or 0.0.0.0) and let the phone automatically scan the VIA header for a received = parameter. The parameter, if present, would indicate that the phone is operating behind a firewall.

The phone proceeds as follows:

1.If the received = parameter is an INVITE response, the current INVITE is canceled and a new INVITE is sent with the new IP address extracted from the

received =NAT_IP_Address parameter in the Contact header. This step is performed only if registration is currently in an idle state.

2.If the received = parameter is in a REGISTER response as a result of a REGISTER command, the phone will cancel all previous registrations and re-register with the new IP address extracted from the received = NAT_IP_Address parameter in the Contact header.

Note For the phone to automatically detect its presence behind a NAT, the SIP proxy server or remote user agent server must include the received = parameter in the VIA header in the responses to the phone if the proxy detects that the source address and port do not match those in the VIA header.

Reserved. Must be set to 0.

 

 

Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)

 

 

 

 

 

 

OL-4277-01

 

 

8-37

 

 

 

Page 154 Page 156
Page 155
Image 155
Cisco Systems 7912G, 7905G manual Bit Description
Page 154 Page 156

7912G, 7905G specifications

Cisco Systems is a leading provider of networking and telecommunications equipment, and among its extensive range of products, the Cisco 7900 Series of IP phones has made a notable impact in enterprise communication. Key models in this series include the Cisco 7905G, 7912G, and 7902G, each designed to enhance productivity through advanced features, intuitive interfaces, and robust technology.

The Cisco 7905G is designed for basic telephony needs and is ideal for administrative environments or areas with high call volumes. It features a large single-line LCD display, providing users with clear visibility of call information. The phone supports Power over Ethernet (PoE), making installation easier and reducing clutter by eliminating the need for an additional power supply. Its hands-free and headset support enhances user convenience, allowing for easy multitasking during calls.

Moving on to the Cisco 7912G, this model is designed for more demanding communication requirements. It features a larger, backlit display, providing improved visibility in various lighting conditions. The Cisco 7912G supports up to 12 programmable line or feature keys, giving users the flexibility to tailor the phone to their specific needs. Additionally, it incorporates advanced audio technologies, such as wideband audio for enhanced voice clarity and a built-in speakerphone, allowing users to communicate effectively in busy environments.

The Cisco 7902G, while offering basic features, is a reliable choice for users who need straightforward, cost-effective telephony solutions. It features an intuitive design with three dedicated buttons for line status, a built-in speakerphone, and support for wideband audio. The phone is geared for users who require essential telephony features without the complexity of additional functionalities, making it suitable for front-desk and general office use.

Overall, these models within the Cisco 7900 series exemplify the company's commitment to providing high-quality enterprise communication tools. With a focus on advanced audio technologies, user-friendly interfaces, and adaptability to various business environments, the Cisco 7905G, 7912G, and 7902G cater to the diverse needs of modern organizations. As companies continue to pursue seamless communication, these IP phones remain a valuable asset in their telephony infrastructure, enhancing collaboration and productivity among teams everywhere.
Top Page Image Contents