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  • Manual... 
  • Distribution Panel For Cisco High-Density Analog and Digital Extension Module For Voice and Fax
    Installation and User Guide (Sep-04)
 

Product Data Sheets (pdf)...Clear One MAX Expandable Conference Phones


Product Data Sheets (pdf)...Plantronics General Office Headsets Plantronics Headset Telephones


Product Data Sheets (pdf)...Mobile Headsets



Black Box Explains...Quick disconnnects.

A quick disconnect enables you to disconnect your headset without disconnecting your call or taking off your headset. This option is expecially convenient when you need to leave your desk... more/see it nowand keep your caller on the line. When you return to your desk, all you need to do is reconnect the plug and you’re talking again. The quick disconnect works well for call centers and busy offices where files aren’t at your desk or when you need to speak to a supervisor. collapse

  • Manual... 
  • Call Router and Out-of-Band Network Switch User Manual
    User Manual for the TL500A (Version 2)
 

Product Data Sheets (pdf)...Telephony Accessories


Black Box Explains...Speaker sound quality.

A human with keen hearing can hear sounds within a range of about 20 Hz to 20 KHz. But most human speech is centered in the 1000 Hz range, so... more/see it nowmost old-fashioned analog telephone networks provided audio bandwidth only in this range. This range transmits most voice information but can fail to register voice subtleties and inflections.

Because these older analog phone systems had such a narrow bandwidth, headset manufacturers built their products to operate only in those particular frequencies.

When digital networks and fiber optic connections came into use, however, they provided a much wider bandwidth for voice transmission. This led to a corresponding increase in headset sound quality.

Today, quality headsets take advantage of increased network bandwidth and typically can reproduce sounds in the 300 Hz to 3500 Hz range. This makes voices far easier to understand and enables you to pick up all the nuances and inflections of your caller’s voice. collapse


Product Data Sheets (pdf)...Flexie Telco Switches

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