A VoLTE subscriber is unable to complete calls. Analysis of network traces reveals that the UE successfully completes IMS registration, and the SIP INVITE message is sent. However, the dedicated bearer for voice media (QCI 1) is never established. The PCRF confirms it sends the PCC rule for the voice bearer to the PGW. Which of the following is the most probable cause for this failure?
A service provider is implementing a sponsored data service where traffic to a partner's video streaming platform is charged to the partner, not the subscriber. A network architect is designing the charging solution on a Cisco ASR 5000 PGW. Which two mechanisms are essential for this implementation? (Select TWO)
During a planned software upgrade on a pair of Cisco ASR 5000s in a geo-redundant MME configuration, an engineer needs to gracefully divert traffic from the active chassis to the standby chassis without impacting subscriber sessions. Which StarOS command should be used to achieve this?
A mobile network operator is designing a solution for corporate clients that require a direct, secure connection from their UEs to the corporate intranet, bypassing the public internet. The solution must assign IP addresses from the corporate address space. Which PGW feature is best suited for this requirement?
True or False: In an SRVCC (Single Radio Voice Call Continuity) handover from LTE to UMTS, the session transfer and media anchoring functions are managed by the MSC Server, which communicates with the MME over the Sv interface.
An administrator is configuring a Cisco PGW and needs to ensure that if the primary PCRF becomes unavailable, policy requests are immediately sent to a secondary PCRF. Which configuration element is essential for enabling this failover mechanism?
A network operations center (NOC) reports a sudden increase in Tracking Area Update (TAU) rejects with the cause code 'IMSI unknown in HSS'. This issue is affecting multiple UEs across various locations. The S6a interface between the MME and the HSS is up and all Diameter peers are reachable. What is the most likely root cause?
A consultant is reviewing the configuration of a Lawful Intercept (LI) solution on a Cisco ASR 5000. The legal requirement is to capture both call content (CC) and Intercept Related Information (IRI) for targeted mobile subscribers. Which statement accurately describes how this is handled in the EPC?
When a UE performs an initial attach to the LTE network, the MME must select an SGW and a PGW for the session. What are the primary mechanisms used for this selection process? (Select TWO)
A mobile operator is experiencing issues with prepaid subscribers who are able to continue using data services for a short period after their balance reaches zero. The Online Charging System (OCS) is confirmed to be functioning correctly. Which parameter on the PGW is most likely misconfigured?