Network

Overview

BWT operates a carrier-grade voice network built on SIP infrastructure. Our network handles origination, termination, and tandem switching for our wholesale customer base.

We are not a reseller. We operate our own switching infrastructure, maintain our own interconnection agreements, and manage our own numbering resources. OCN 8697 is ours, and the network behind it is ours.

Switching

Our core switching platform handles call routing, number translation, and interconnection with other carriers. We maintain tandem switching capabilities for routing traffic between interconnected carriers in our footprint.

All switching is SIP-native. We don’t maintain legacy TDM infrastructure or TDM-IP gateways. If you need a TDM handoff, we’re not the right fit.

Protocol Support

  • SIP: RFC 3261 compliant. We support SIP over UDP, TCP, and TLS (port 5060/5061).
  • Codecs: G.711 (PCMU/PCMA) is preferred and required on most routes. We support G.729 on select paths but strongly prefer G.711.
  • DTMF: RFC 2833 (telephone-event). We do not support in-band DTMF or SIP INFO for tone signaling.
  • Media: RTP and SRTP (RFC 3711). We support SRTP for encrypted media on request.
  • Fax: T.38 is supported for fax origination and termination on our on-net footprint.

STIR/SHAKEN

We are a fully participating carrier in the STIR/SHAKEN framework. All originating calls from our network carry signed SHAKEN attestation tokens.

  • Full Attestation (A): For calls where the caller has been authenticated and the calling number is assigned to the customer.
  • Partial Attestation (B): For calls originated by an authenticated customer where we cannot verify the calling number assignment.
  • Gateway Attestation (C): For calls entering our network from a TDM or non-authenticated source.

We are listed in the FCC’s Robocall Mitigation Database. See our STIR/SHAKEN page for complete details on our attestation policies and robocall mitigation program.

Numbering

BWT holds numbering resources directly from the North American Numbering Plan Administrator (NANPA) and through pooling administrators. Our numbering resources include:

  • NPA-NXX blocks in Maryland, New York, and expanding markets
  • Thousands-block pooling participation in applicable rate centers
  • Toll-free number origination through our RespOrg relationships

We are a NANPA-recognized carrier (OCN 8697) and participate in standard industry numbering processes including code assignments, pooling, and number conservation.

Reliability

We don’t publish a fancy SLA with five-nines promises and a complicated credit schedule. We just build things well and fix them fast when they break. Our network is designed with redundancy at every layer - but we’re not going to pretend that nothing ever goes wrong. When it does, we communicate clearly and resolve it quickly.

If uptime guarantees and SLA credits are important to your procurement process, we can work something out. Talk to sales.