Chapter 4 Basic and Additional SIP Services

 

 

Additional SIP Services

 

Table 4-2 Additional SIP Services (continued)

 

 

 

 

 

 

SIP Service

Description

Reference

 

 

 

 

NAT gateway

Network Address Translation (NAT) supports port

See the “Network

 

mapping and forwarding to standard default SIP

Parameters” section on

 

signaling port 5060 and media base port 16384, or other

page 8-2 and the “SIP

 

ports as configured for the Cisco IP Phone. Media ports

Parameters” section on

 

are evenly numbered from the base port. NAT must

page 8-9.

 

support multiple port mappings. The phone can use up

 

 

 

to four media ports to handle conference calls on both

 

 

 

lines. For example, if media base port 16384 is used for

 

 

 

one call, the next call uses port 16386 and other calls

 

 

 

will use ports 16388 and 16390. (Routers such as

 

 

 

D-Link, WinRoute, and WinProxy may not route

 

 

 

correctly if both caller and callee are behind the same

 

 

 

NAT.)

 

 

 

To configure the phone to work in a NAT environment,

 

 

 

make the following settings:

 

 

 

Use the StaticRoute parameter to specify the LAN

 

 

 

IP address of the NAT through which the phone

 

 

 

will communicate.

 

 

 

Use the NATIP parameter to specify the WAN IP

 

 

 

address of the NAT through which all external SIP

 

 

 

user agents will communicate.

 

 

 

Optionally use the SIPPort parameter to specify a

 

 

 

new port for SIP messages.

 

 

 

Optionally use the MediaPort parameter to specify

 

 

 

a new base port for RTP media.

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

OL-4277-01

 

 

4-7

 

 

 

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Cisco Systems 7912G, 7905G manual and the SIP

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.