• Open source project based on modern SIP stack from
  • Unified platform for NGN operators
  • Integrated real-time converged  billing
  • Carrier-grade SIP routing platform.
  • Platform for the delivery of enhanced business and communications services

YETI. What is it?

How it works


Web interface


  • Easy to use WEB 2.0 interface

  • Authentication via LDAP

  • Management and Monitoring

  • Rating and Invoicing

  • Full data auditing and versioning

Statistics and reports

  • Short-term realtime statistics for each route and gateway allows to detect quality changes for this entities

  • Interface to create custom reports based on CDRs analysis

  • Automatic reports generation and mailing



  • Real-time prepaid, postpaid and wholesale service

  • Detects and prevents potential fraudulent activity

  • Automatically disconnects calls to prevent balance overdrafts

  • Manual/automatic Invoice generation

  • PDF/ODT/CSV/XLS  traffic detalisation documents



  • Asynchronous CDRs writing. Allows to provide high performance and stability of recording
  • CDRs writing does not affect on signaling traffic or processing performance
  • Customer specified/adaptive CDR Format

Ensuring compatibility and SIP normalization

  • Disconnect codes translation

  • DTMF translation (both ways between SIP INFO and rtpevent) and normalization

  • Normalization for SIP and SDP

  • Additional features to handle non-standard SIP implementations


Authorization / routing capabilities


  • Authorization by IP, SRC prefix, DST prefix, POP, SIP URI domain, custom SIP header

  • Flexible billing and routing rules for authorized traffic

  • Various routing algorithms. Load Balancing

  • Black/white lists on any stage of routing

  • Channels limitations

  • Simultaneous calls limitation for any entity

  • Local Number Portability. Requesting LNP databases is performed using SIP or HTTP REST API

Media Processing


  • Transcoding between following codecs: g711(alaw, ulaw), g723.1, iLBC, speex, GSM, G726, G721, OPUS*

  • Flexible configuration of the codecs negotiation

  • Effective NAT traversal using comedia (symmetric rtp) and rtp ping

  • Fax transmission through T.38 relay and inband g711

*ready for testing

Failover and rerouting

  • DNS SRV for SIP signaling

  • Geo-clustering and redundancy

  • Disconnect codes or ringing timeout rerouting

  • Flexible routing/rerouting rules for each termination gateway


Geo-distributed systems and clustering

Geo-distributed high availability cluster installation supports:




*connection failures between components

  • Horizontal scalability for all components
  • Zero-downtime upgrade
  • Error-free* call processing
  • Geo-POP based termination
  • Traffic managing without active calls affects.


By YETI Softswitch