Live demo · 5G Standalone

5G Initial Registration (Attach)

Pick a scenario, configure the SIM and core parameters, then play it through — or click any message to inspect protocol, route, parameters and references. Filter by network function, and download a PCAP that opens directly in Wireshark.

Reference: 3GPP TS 23.502 §4.2.2.2.2, TS 24.501 21 messages

Scenario

⚙ Configure SIM, gNB, AMF and UDM parameters Values are substituted into every relevant message

SIM / UE identity MCC MNC MSIN K (128-bit hex) OPc (128-bit hex) SQN (48-bit hex) AMF field (16-bit hex) Routing Indicator Home Network PKI Protection Scheme

gNB / RAN gNB ID (22-bit hex) Cell ID (hex) TAC (24-bit hex) NR-ARFCN (DL) NR band

AMF / Slice / DNN AMF Region ID (8-bit hex) AMF Set ID (10-bit hex) AMF Pointer (6-bit hex) S-NSSAI SST (8-bit) S-NSSAI SD (24-bit hex) DNN T3512 (periodic reg timer) T3502 (mobility reg timer)

UDM / Subscription Authentication method Default DNN Allowed S-NSSAIs UE-AMBR uplink UE-AMBR downlink Operator-Determined Barring

Tip: values like {{sim.mcc}} in message parameters are replaced live from this form.

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What you just saw

Four scenarios today, the full 4G/5G/IMS procedure library on launch.

Inter-RAT & Xn / N2 handover, PDU Session modification & release, periodic registration update, paging, IMS registration, MO/MT VoNR & VoLTE call setup, SMS-over-NAS — each authored with the same parameter depth and the same interactive engine.

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