Digital Trunk


Verizon's Digital Data Services (DS1 and DS3) provide extremely powerful, digital point-to-point private line service at speeds from 1.544 Mbps (Megabits per second) up to 45 Mbps.

DS1s and DS3s are high-capacity channels that carry voice grade local exchange and channel service between the customer's serving central office and the customer's compatible premises equipment.



  • High volumes of information can be transmitted at high speeds.
  • High-capacity digital data services can be economical alternatives to using multiple lower-speed channels to transmit the same information.
  • Meetings can be held by videoconferencing, which reduces travel time and expense.
  • Secure access reduces unauthorized access to your network.
  • Allows 24 voice-grade lines to be digitally delivered to the customer premises (the customer only needs one line card in their equipment instead of 24 line cards).
  • Applications include fax servers and voice messaging services; Internet Service Providers (ISPs) can also use digital trunk as a substitute service for ISDN PRI.


Digital trunks are supported at the Service Delivery Point (SDP) for incoming, outgoing, and two-way traffic and direct inward an outward dialing. Channelized T1 is supported for 24 separate DS0 channels where the ability to assign telephone numbers to the individual DS0s is available with the T1. Verizon Business’s channelized T1 service meets the specifications in the ANSI standards T1.102/107/403.