SNgrep – Command line SIP Debugging Linux, RFCs & Standards, VoIP Using sngrep to view SIP logs like a champ.
EPC, EUTRAN, IMS / VoLTE, LTE, Mobile Networks, RFCs & Standards, VoIP IMS / VoLTE IPsec on the Gm Interface
EPC, EUTRAN, LTE, Mobile Networks, Notes, RF IMTx: NET02x (4G Network Essentials) – Management of Sporadic Data Flows – 4. UE Triggered Service Request
EPC, IMS / VoLTE, LTE, Mobile Networks, RFCs & Standards, SDM, VoIP Diameter and SIP: Location-Info-Request / Answer