Cisco Bug: CSCvh68420 - Unable to control SRVCC behavior if it has no "Supported Codec"
May 16, 2019
- Cisco ASR 5000 Series
Known Affected Releases
Symptom: If a subscriber doesn't have ?supported codecs? in MM context, it causes SRVCC failure when MME receives "HO required request as SRVCC. According to 3GPP documents, ?supported codecs? is a mandatory IE if the UE supports SRVCC to GERAN or UTRAN. But current MME doesn't have options to control such HO Required Req, for example, block the HO Required Req or set default "Supported Codecs" in SRVCC PS to CS Request to MSC. Conditions: Attach Request doesn't include "Supported Codecs"
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