Frequently Asked Questions

A1Routes is a carrier grade SIP Trunking provider that provides simplified, auto scalable access to telephony network worldwide. We strive to provide the perfect solution for every kind of business especially CallCenters. We are compatible with a wide array of PBX platforms to ensure that your business has the connection it needs with the quality you expect. We also offer smart media handling, which means A1Routes figures out automatically how to bypass or handle media based on your location and latency stats. This delivers the best call quality in VoIP industry.

SIP (Session Initiation Protocol) is the protocol used by VoIP (Voice over Internet Protocol) systems by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and Unified Communications facilities.

SIP is developed in the IETF and is ASCII-based and does not require any encoding to be read. It is also more flexible and designed to deal with different types of media ( voice, video, chat etc).

Two major reasons that need to be considered when transitioning to SIP Trunking at an enterprise are cost and features. Businesses that utilize SIP Trunking save up to 70% more in expenses than businesses that have contracts with traditional phone companies. A successful implementation of SIP trunks can be used as a cost-savings method to help pay for the implementation of other components of a UC solution.

SIP Trunking provides one of the best network-environments suited to the next gen unified communications and various collaborations. From Video and Audio Conferencing to Voicemail and Email, SIP Trunking is the perfect solution. The other major reason for implementation of SIP trunks is to access new features that could not be accessed with TDM trunks. An example of a feature that is more widely deployed on SIP trunks than previous trunking methods is video calls. You can implement high-definition video calling on H.323 trunks and TDM trunks; however, the most advanced features, such as Cisco Telepresence, are currently implemented utilizing SIP trunks.

A1Routes is a group who have extensive experience in building and deploying large scale SIP solutions. VoIP providers/SIP provider generally don't like CallCenter traffic due to low contact ratio or low ASR (Answer to Seizure Ratio) as automated dialers used in CallCenters generate so many short duration or unanswered calls.

Our full suite of outbound termination services includes direct termination with local exchange carriers in the contiguous US and most of Canada for less than a penny a minute.


  • Best quality routes, best low rates and reliability
  • Auto scale capable infrastructure to handle any amount of traffic. From residential to small and medium business to industry specific entities like CallCenters (BPOs, KPOs).
  • Simple signup process and easy to use management interface.
  • Smart media handling.
  • Compatible with service tools like Cisco, Alcatel, Sansay, Asterisk, FreeSWITCH, Lync and many others SIP compliant equipment
  • Amplify PBX, switching platform, and phone functionality by using our detailed routing intelligence.