Refurbished Phone Exchange Blog

The Plantronics Electronic Hook Switch (EHS) cable is an add on cable for Plantronics’ wireless headsets that enables remote answer of phone calls away from the desk. With the Plantronics EHS cables, users can answer a call even if they’re not at their desk. Without an EHS cable, users would have to answer the call from the phone or use an HL-10 handset lifter. EHS Cables Compared to HL10 Lifters The Plantronics EHS cables do the same job as Plantronics HL10 lifters, but they go about it in very different ways. Where the HL10 works through physically lifting a phone’s...

Key Functionality, also known as Line Functionality, is a type of phone system setup. Key System Units, abbreviated to KSUs, were digital phone systems in the 80’s to early 2000’s that were designed around having phones ring based on what ‘line’ rang. Each analog or ISDN trunk that came into the system was assigned a line key. This line key was then shared out in a shared line account (SLA) that would ring all the phones in the group when the analog trunk rang. If you ever said “You have a call on line 3,” at your job, chances are...

The Aastra 675xi is no more... Mitel-Aastra has officially discontinued the 675xi series of IP phones. These phones were SIP based IP phones compatible with Asterisk based phone systems and AastraLink phone systems. The Aastra 57i and other phones in the series became synonymous with high quality programmable phones for SIP based phone systems. On October 7, 2014 the 675xi series was officially discontinued.   The Replacement... The replacement series of phones will be the Aastra 686xi phones. The two phones being originally released in the series are the 6865i and the 6867i IP phones. These phones will maintain the...

The Vertical Edge 700 (VW-E700-24) is an IP based phone purpose built for the Vertical Wave IP and MBX IP business phone systems. These are Vodavi’s enterprise and large business phone systems. The Vertical Edge 700 is a backlit phone with a 3 line display. This IP phone has a speakerphone, a headset jack, 24 programmable keys, dual color LED status indicators for every programmed key, an adjustable LCD, and numerous other features. The Vodavi IP 7024D is purpose built for the Vodavi XTS and Vertical SBX phone systems. These systems are meant for smaller businesses. The IP 7024D...

Narrowband, and more frequently Wideband are becoming buzzwords in the telecom world. Narrowband and Wideband audio refers to telephone audio sampling, how much of the frequency range is sampled provides us with the differences of narrowband and wideband. Narrowband audio is sampled at 8,000 Hz and Wideband is sampled at 16,000 Hz providing a much wide range of human tonality to pass through.   Narrowband Audio: Narrowband comes in many variations, but the most traditional version of this style of codec is the G.711. G.711 actually refers to two different codecs: G.711 mu-law is used in North America while...