Refurbished Phone Exchange Blog — ip telephony

  What is SIP?Session Initiation Protocol, commonly referred to as SIP, is a protocol commonly used in the voice over IP (VoIP) community. The session initiation protocol creates, maintains, and ends data transmission between two or more parties for an established data media stream of voice or video. What SIP does not do is transmit the media stream itself. SIP works in conjunction with another protocol such as real-time Transport Protocol (RTP) or Secure Real-time Transport Protocol (SRTP) to deliver the actual data. Why is SIP important?Why SIP is important is that SIP is the most common open standards protocol for establishing phone...

The Panasonic KX-NT343 is an IP based telephone for Panasonic phone telephones. The KX-NT343 is one of several phones released by Panasonic that offers the ability to connect a Bluetooth headset to the phone.   Unfortunately, the KX-NT343 does not come with this capability in the factory configuration. An optional module is required for Bluetooth operation. The Panasonic KX-NT307 Bluetooth module installs behind the LCD module of the phone.   Once installed, the Panasonic KX-NT343 supports the ability to answer a call, end a call, and voice communications. The module is compatible with the following Panasonic phones: NT343 NT346 NT366...

The ShoreTel 230 and 230G are IP phones specially designed for the ShoreGear phone system. These phones operate on the MGCP protocol unlike most traditional SIP phones. Regardless, the phones are full of features such as a graphical display, full duplex speakerphone, and support for the G.722 HD audio codec.   As similar as the ShoreTel 230G is to the ShoreTel 230, they are not the same phone. The ShoreTel 230G is a Gigabit phone. What this means is that the integrated Ethernet switch on a ShoreTel 230G can transfer data at speeds up to 1 Gbps. This ‘Gig’ switch...

Adtran IP706 Phone Graphical LCD display (Backlit) 6 Programmable Buttons 6 Line/Call Appearances 10 Fixed Feature Keys 4 Soft Keys Full Duplex Speakerphone Integrated 10/100 Ethernet Switch Built-in Headset Port PoE SIP   Adtran IP712 Phone 12 Programmable Buttons 12 Line/Call Appearances Large Graphical LCD Display (Backlit) 4 Soft Keys 10 Fixed Feature Keys (mute, speakerphone, goodbye, message, etc...) Integrated 10/100 Ethernet Switch Built-in Headset Port PoE powered SIP

When setting up your 3Com NBX phone system, you will need some way of connecting your phones to the outside world. This is accomplished through the use of line cards in your 3Com phone system. There are six types of line cards, each designed for a different standard. Below is a summary of each card and how they are used. 3com analog line cards (Part no. 3C10114B and 3C10114C) connect your 3Com system to the outside world through traditional phone lines. Each card adds 4 FXO trunks that connect to POTS lines. These analog cards connect your system to the...