Refurbished Phone Exchange Blog — voip telephony

  Those deploying an ESI based IP phone system will need to decide on an IP phone to use. Two of the more commonly used IP phones are the ESI 48 Key IPFP and the ESI 48 Key IPFP2 phones. If these phones sound incredibly similar to you, it’s because they are. There are two differences any telecom engineer should be aware of before deploying the phones.   Do You Need Power Over Ethernet? The ESI IPFP 48 key does not come with the ability to accept Power Over Ethernet. If you are deploying a system that has a PoE...

  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 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

ShoreTel phones have always been hot commodities here at Refurbished Phone Exchange.  They come preconfigured and packed with important features, have a simple yet elegant design, and come in a wide range of prices.  Since we love ShoreTel phones so much here, we've decided to create a ShoreTel Phone Guide to help our customers pick the VoIP phone that's right for their business.   ShoreTel Phone Glossary 110 115 210 212K 230 230G 265 420 480 530 560 560G 565G 655   ShoreTel 110 IP Phone The ShoreTel 110 is perfect when desk space is at a minimum.  The 110...