SIP-302 - Carrier Interconnect

Course code	SIP-302
Track	CCVE - Certified Carrier Voice Engineer (second of two)
Level	Advanced (upper half)
Prerequisites	SIP-301 required. CVP strongly recommended.
Total commitment	~14 hours including paired-capture labs
Format	Self-paced LMS, interactive scenes, IMS Diameter and STIR/SHAKEN labs
Assessment	8 module quizzes (80% pass) + CCVE exam block (proctored)
Primary specifications	RFC 8224 + 8225 (STIR/PASSporT), ATIS-1000074 (SHAKEN), ATIS-1000613 (LNP), RFC 4867 (AMR), 3GPP TS 23.228 / 24.229 / 26.114 / 29.228, RFC 6733 (Diameter), 8857 (simulcast), 4588 (RTX), 7118 (SIP-WebSocket), 8656 (TURN), 9027 (RCD), 47 CFR Part 1 Subpart Z (CALEA)

What you'll be able to do

• Read a SHAKEN-attested call's Identity header; verify the JWT signature; identify A/B/C attestation level.
• Trace an LNP port-in workflow end-to-end with LSR/FOC/NPAC activation.
• Identify port-out fraud signals and design a layered mitigation policy.
• Decode MGCP CRCX/MDCX/DLCX/RQNT/NTFY transactions and Megaco Add/Subtract/AuditValue commands.
• Reason about transcoding chains and per-hop MOS loss; navigate the codec-licensing landscape.
• Trace a WebRTC-to-carrier interworking call with simulcast, RTX, and AMR mode interop.
• Read an IMS interconnect with Cx (UAR/MAR/SAR/LIR), Sh, and Rx (AAR/AAA) Diameter touches.
• Recognise CNAM dip mechanics, 800-routing, premium-rate regulatory framing, and CALEA's recognition boundary.
• Pass the SIP-302 portion of the CCVE exam.

Module map

#	Module	Lessons	Lab?	Quiz?
0	Pre-flight primer (free preview)	2	No	Self-check
1	The Carrier Interconnect	5	No	10 Q
2	STIR/SHAKEN	6	Lab 2.1	10 Q
3	Number Portability at Carrier Depth	5	Lab 3.1	10 Q
4	MGCP and Megaco/H.248 at Operational Depth	6	Lab 4.1	10 Q
5	Transcoding Chains, Codec Licensing, Quality	5	Lab 5.1	10 Q
6	WebRTC-to-Carrier Interworking	5	Lab 6.1	10 Q
7	IMS Interconnect	6	Lab 7.1	10 Q
8	Carrier Service Layer + Regulatory	4	No	10 Q
9	Troubleshooting + CCVE Exam Prep	3	Practice exam	Practice exam
Totals		47 lessons	6 labs	8 graded + practice