Glossary

E

E.164

endpoint

The international public telecommunications numbering plan. A standard set by the ITU-T that addresses telephone numbers.

A source or sink of voice data, which may be physical (such as a trunk interface or a line interface in a media gateway) or logical (such as an announcement stored on a server).

expansion

The process of running a compressed data set through an algorithm that restores

 

the data set to its original size. Compare with companding and compression.

F

firewall

Router or access server, or several routers or access servers, designated as a

 

buffer between any connected public networks and a private network. A firewall

 

router uses access lists and other methods to ensure the security of the private

 

network.

FQDN

Fully qualified domain name. FQDN is the full name of a system, including the

 

domain name and not just the host name. For example, aldebaran is a host name,

 

and aldebaran.interop.com is an FQDN.

FSK

FXO

Frequency shift key.

Foreign exchange office. An FXO interface connects to the public switched telephone network (PSTN) central office and is the interface offered on a standard telephone. The Cisco FXO interface is an RJ-11 connector that allows an analog connection at the PSTN central office or to a station interface on a PBX.

FXS

Foreign exchange station. An FXS interface connects directly to a standard

 

telephone and supplies ring, voltage, and dial tone. The Cisco FXS interface is

 

an RJ-11 connector that allows connections to basic telephone service

 

equipment, keysets, and PBXs.

 

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

GL-4

OL-4277-01

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Cisco Systems 7905G, 7912G manual GL-4
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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.
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