Astound PRI and SIP Trunking

by Astound

Fiber-optic voice services

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PRI

Our Primary Rate Interface (PRI) is a channelized digital trunk service to connect a PBX or key system to the Public Switched Telephone Network (PSTN). It provides 24 channels (23B + 1D) on a T1 interface on your premises.

Cost savings

  • Having a PRI provides a cost-efficient alternative to terminating individual analog trunks into a PBX system.

Digital vs. analog technology

  • Our PRI uses digital rather than analog technology between the PSTN network and your premises for better security and fault tolerance.

Standard interface

  • The PRI interface is a worldwide standard supported by all PBX manufacturers. It includes voice channels as well as the D channel for call set-up and tear-down functionality.

Enhanced capability

  • Our PRI has the capability to include two-way trunks and Caller ID (name/number) notifications. It also reduces call set-up times by utilizing D channel out-of-band signaling across the PSTN network.

SIP Trunking

SIP enables businesses to use their existing Ethernet/fiber connection as a voice solution. Called VoIP (Voice over Internet Protocol), SIP connects your existing PBX interchange to a data network. This virtual connection uses a packet-switched model to connect voice to voice, from phone to data connection to your regional phone lines.

Leverage unused bandwidth

  • With voice and data converged on one network, bandwidth can be dynamically allocated to allow for increased or decreased usage in either direction. For example, you can temporarily allocate bandwidth to support batch jobs during down times to reduce excess, idle capacity.

Maximize existing investments

  • SIP Trunking can support existing on-premises equipment.

Consolidate resources

  • Converging voice and data on the same network means there’s no need to manage or pay for separate access.

Increase traffic

  • SIP Trunking uses compression technology to pump more voice traffic on the same size pipe.