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- Voice Communications
Digital signal (DS) speeds are used to classify the capacities of lines and trunks as designated by the Trunk (T) carrier systems. The most well-known T carrier system is the North American T1 standard, which was originally designed to transmit digitized voice signals at 1.544 Mbps (DS-1). T carrier systems now carry digital data as well as voice transmissions.
DS-3 lines offer the functional equivalent of 28 T1 channels, operating at 44.736 Mbps (commonly rounded up to 45 Mbps). These lines handle up to 672 voice conversations and are used in high-speed interconnect and DS cross-connect (DSX) applications.
DS-4 offers 274.176 Mbps transmission—the same as 4032 standard voice channels—and has 168 times the capacity of T1. This performance level is generally used for carrier backbone networks.
Products offering DS-3 and DS-4 functionality comply with T3 and T4 standards, respectively, and with Bellcore GR-139-CORE specifications.
Black Box has partnered with Synnex to fulfill all Black Box GSA product orders. Black Box products are now available on Synnex GSA schedule GS-35F-1043-R.
Orders or Quotes - If you already know which specific Black Box products you need you can contact Synnex directly to request a quote or place an order by calling 877-230-5680 or email email@example.com
Technical Support or Product Selection - If you need technical and design support or help with product selection, Black Box will continue to assist you. Please contact us at 877-877-2269 or info@Blackbox.com.