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Table of Contents

FortiOS Carrier

CS Fallback and SRVCC related messages

Message type (value)

Description

Suspend notification (162)

Sent as part of CS fallback processes to suspend a UE. After receiving a suspend notification message, the SGW/PGW marks all the non-GBR bearers as suspended status.

Suspend acknowledge (163)

Reply to a suspend notification to acknowledge the notification.

Resume notification (164)

Sent as part of a process to resume a suspended node or UE.

Resume acknowledge (165)

Reply to a resume notification to acknowledge the notification.

CS paging indication (151)

Sent on the S3 interface by the MME to the associated SGSN when ISR is activated as part of mobile terminated CS services.

Alert MME notification (153)

Sent on the S3 interface by the MME to the associated SGSN as part of an SGs Non-EPS alert procedure when ISR is activated.

Alert MME acknowledge (154)

Reply to an alert MME notification to acknowledge the notification.

UE activity notification (155)

Sent on the S3 interface from the SGSN to the associated MME as part of an SGs non-EPS alert when ISR is activated to indicate that activity from a UE has been detected.

UE activity acknowledge (156)

Reply to an UE activity notification to acknowledge the notification.

CS Fallback and SRVCC related messages

Message type (value)

Description

Suspend notification (162)

Sent as part of CS fallback processes to suspend a UE. After receiving a suspend notification message, the SGW/PGW marks all the non-GBR bearers as suspended status.

Suspend acknowledge (163)

Reply to a suspend notification to acknowledge the notification.

Resume notification (164)

Sent as part of a process to resume a suspended node or UE.

Resume acknowledge (165)

Reply to a resume notification to acknowledge the notification.

CS paging indication (151)

Sent on the S3 interface by the MME to the associated SGSN when ISR is activated as part of mobile terminated CS services.

Alert MME notification (153)

Sent on the S3 interface by the MME to the associated SGSN as part of an SGs Non-EPS alert procedure when ISR is activated.

Alert MME acknowledge (154)

Reply to an alert MME notification to acknowledge the notification.

UE activity notification (155)

Sent on the S3 interface from the SGSN to the associated MME as part of an SGs non-EPS alert when ISR is activated to indicate that activity from a UE has been detected.

UE activity acknowledge (156)

Reply to an UE activity notification to acknowledge the notification.