Common use of Proper Gateways for Service Providers Clause in Contracts

Proper Gateways for Service Providers. West supports ESInet ingress IP traffic via the NENA i3 and ATIS-0700015 “Standard for Implementation of 3GPP Common IMS Emergency Procedures for IMS Origination and ESInet/Legacy Selective Router Termination, August 2013”. The IP Point of Interconnect (POI) supporting Session Internet Protocol (SIP) call delivery is the West Border Control Function (BCF) at each of the geographically diverse Emergency Call Management Complex (ECMC) locations. The SIP interface can be used for carriers delivering i3 compliant interface with PIDF-LO or ESInet to ESInet call hand-offs and transfers. Additionally, the SIP Ingress protocol can be used to support a transition strategy where IP protocols are used to replace TDM protocols as a means to providing better connectivity with redundant path routing and a transition from legacy to NG9-1-1 interfaces. The process for migrating carrier traffic from the gateways to the SIP POIs is defined in detail and will be reviewed with the carrier when the migration process is initiated. A summary of the overall process to be led by an West Project Manager (PM) is provided below:  PM communicates the timeframes, dependencies and requirements for migration  PM provides SIP interconnection specifications, industry standards and online ordering guidelines  PM provides plans including schedules, milestones and deliverables and works with the carrier to establish capacity requirements, interconnection steps, etc.  Connections are ordered by the carrier and established and tested with West  Upon successful completion of interconnection of carrier SIP virtual trunk groups from the gateway, the TDM trunk groups are disconnected

Proper Gateways for Service Providers. West supports ESInet ingress IP traffic via the NENA i3 and ATIS-0700015 “Standard for Implementation of 3GPP Common IMS Emergency Procedures for IMS Origination and ESInet/Legacy Selective Router Termination, August 2013”. The IP Point of Interconnect (POI) supporting Session Internet Protocol (SIP) call delivery is the West Border Control Function (BCF) at each of the geographically diverse Emergency Call Management Complex (ECMC) locations. The SIP interface can be used for carriers delivering i3 compliant interface with PIDF-LO or ESInet to ESInet call hand-offs and transfers. Additionally, the SIP Ingress protocol can be used to support a transition strategy where IP protocols are used to replace TDM protocols as a means to providing better connectivity with redundant path routing and a transition from legacy to NG9-1-1 interfaces. The process for migrating carrier traffic from the gateways to the SIP POIs is defined in detail and will be reviewed with the carrier when the migration process is initiated. A summary of the overall process to be led by an West Project Manager (PM) is provided below:  • PM communicates the timeframes, dependencies and requirements for migration  • PM provides SIP interconnection specifications, industry standards and online ordering guidelines  • PM provides plans including schedules, milestones and deliverables and works with the carrier to establish capacity requirements, interconnection steps, etc.  • Connections are ordered by the carrier and established and tested with West  • Upon successful completion of interconnection of carrier SIP virtual trunk groups from the gateway, the TDM trunk groups are disconnected