Vocera SIP Telephony Gateway SIP Trunk Specifications

Understand requirements for using a hosted or cloud-based telephone system with Vocera Voice Server.

Requirements for Connecting the Vocera SIP Telephony Gateway to a Cloud-based or Hosted Telephone System

The Vocera SIP Telephony Gateway (VSTG) can connect to a SIP trunk on a hosted or cloud-based PBX either directly or through a SIP gateway configured at the network edge. To successfully connect and interoperate the SIP trunk used by the VSTG, your telephone system must support the following requirements:
  • SIP version 2.0 as specified in RFC 3261.
  • RFC 2833 standard DTMF in order to support features such as paging and dialing Vocera extensions through the guest access number.
  • Real Time Protocol (RTP) audio to the VSTG must use the G.711 µ-Law or A-Law codec. The packet spacing must be 20 milliseconds.

If you experience interoperability challenges with a SIP trunk supporting these standards, please contact Vocera Technical Support for further assistance

What is Not Supported

The VSTG does not support these features:
  • SIP Trunk Authentication
  • SIP Trunk Registration
  • NAT Traversal