Chapter 8 Profile and Web Page Parameters and Defaults

Parameter Details

•TAmplitude_1 and TAmplitude_2 are the transformed amplitudes (volumes) of the first and second frequencies, respectively. Calculate each value as follows:

A * 32767 * sin(2 * pi * Frequency/8000) where:

–A is the amplitude factor, which controls the volume. This value is calculated as follows, where k is the desired volume in dBm and n is the number of frequencies (1 or 2):

A = 0.5 * 10((k + 9 – (n – 1) * 3) / 20)

For example, for a one-frequency tone with a volume of –19 dBm, A = 0.5 * 10((–19 + 9)/20) = 0.16

–Frequency is the desired frequency in Hz

•NumOfOnOffPairs is the number of on-off pairs in the cadence of the tone (0, 1, or 2). For a steady tone, use 0.

If this value is 0, the OnTime_1, OnTime_2, OffTime_1, and OffTime_2 values must also be 0.

•OnTime_1 and OnTime_2 are the lengths of time that the first and second on-off pairs of a cadence play a sound, respectively. (See Figure 8-1for a graphical representation.)

Specify each value as a number of samples with the sampling rate of 8 kHz. The range of each value is 0 to 0xffff.

For example, for a length of 0.3 seconds, set a value to 2400.

•OffTime_1 and OffTime_2 are the lengths of silence after the sound of the first and second on-off pairs of a cadence, respectively. (See Figure 8-1for a graphical representation.)

Specify each value as a number of samples with the sampling rate of 8 kHz. The range of each value is 0 to 0xffff.

For example, for a length of 0.3 seconds, set a value to 2400.

 

 

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

 

 

 

 

 

 

OL-4277-01

 

 

8-29

 

 

 

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Cisco Systems 7912G, 7905G manual = 0.5 * 10k + 9 n 1 * 3
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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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