RSSAll Entries in the "IP Telephony" Category

How to Reset Cisco IP Phone 7900 Series to Factory Default

Reset Cisco IP Phone 7900 Series to Factory Default You can perform a reset to factory default of the Cisco 7940, 7941, 7960, 7961 and 7970 IP phones and this is useful for many types of recovery, especially when the phone is so disabled that it cannot enter Network Configuration to reset to factory default.   Complete below steps to reset Cisco IP Phone 7900 series to factory default. 1. Unplug the power cable from the IP phone, and then plug in the cable again. The IP  phone begins its power up cycle. 2. Immediately press and hold # key and while the Headset, Mute, and Speaker buttons begin to flash in sequence, next release # key. 3. Press 123456789*0# within 60 seconds after the Headset, Mute, and Speaker buttons begin to flash. 4. Press 1 to keep network configuration or 2 to lose the network configuration. If you repeat a key within the sequence, […]

How to Reset the Cisco IP Phone 7961 to Factory Default

The Cisco 7961G IP phone features a high-resolution 4-bit grayscale display, double-byte character and Unicode text support for Extensible XML application development, six programmable “Line/Feature” buttons, and four interactive soft keys, according to Cisco’s website. The Cisco 7961G IP phone includes internal flash memory for software and firmware updates and automatic device configuration. If your phone is in an incorrect or uncertain configuration, you can manually reset the phone to its factory default settings. Steps to Reset the Cisco IP Phone 7961 to Factory Default   1. Unplug the power cable from the Cisco 7961G IP phone, and then plug in the cable again. The Cisco 7961G IP phonebegins its power up cycle. 2. Immediately press and hold # and while the Headset, Mute, and Speaker buttons begin to flash in sequence, release #. The line buttons flash in sequence in order to indicate that the phone waits for you […]

What is Voice over IP CODEC

CODEC: CODEC is used to convert an analog voice signal (waveforms) to digitally encoded signal. In addition to performing the analog to digital conversion, CODECs compress the data stream and also provide echo cancellation. The CODECs for VoIP are also termed “vocoders,” meaning voice encoders. CODECs typically perform encoding-decoding, compression-decompression, and least often, encryption-decryption. CODECs vary in the sound quality, the bandwidth required, the computational requirements, etc. The process of converting analog waveforms to digital information is done with a voice coder-decoder by fallowing below tasks. Most of the CODECs will do first two tasks. Encoding and Decoding Compression and Decompression Encryption and Decryption Encoding and Decoding: The voice is first converted to analog electrical pulses, which is then given to analog to digital converter whose output is quantized voice. This process of converting analog signal to digital data is termed as encoding. At the receiver end the digital data […]

How to Configure X-Lite SIP Softphone with VOIP accounts

X-Lite is one of the best softphone on the market available today and it is also free as well. A softphone is a portal for access to your VOIP provider. Many VOIP providers give SIP settings like Account number, Password and SIP server address for people to use a softphone to make calls with, this type of calls are called PC to Phone. XLite is a softphone that is loaded with extra features and therefore it can sometimes be hard to set it up. Follow these procedures to successfully make a PC to Phone call and this step by step procedure is applicable for any your favorite SIP Softphone. Before configuring X-lite softphone, you have to download and install X-Lite. X-lite softphone Software can be found anywhere on the internet and it is free. Next, you need a VOIP service that gives SIP settings. If you have these two then […]