ReddRadar
Agent skill
sip-protocol-fundamentals
Use when working with SIP messages, methods, call flows, and protocol fundamentals for VoIP applications.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/sip-protocol-fundamentals
SKILL.md
SIP Protocol Fundamentals
Master the Session Initiation Protocol (SIP) for building VoIP applications, understanding SIP messages, methods, and call flows essential for real-time communications.
Understanding SIP
SIP is an application-layer signaling protocol defined in RFC 3261 for creating, modifying, and terminating sessions with one or more participants.
SIP Message Structure
INVITE sip:bob@biloxi.com SIP/2.0
Via: SIP/2.0/UDP pc33.atlanta.com;branch=z9hG4bK776asdhds
Max-Forwards: 70
To: Bob <sip:bob@biloxi.com>
From: Alice <sip:alice@atlanta.com>;tag=1928301774
Call-ID: a84b4c76e66710@pc33.atlanta.com
CSeq: 314159 INVITE
Contact: <sip:alice@pc33.atlanta.com>
Content-Type: application/sdp
Content-Length: 142
When to Use This Skill
Use sip-protocol-fundamentals when building VoIP applications with SIP signaling.
Best Practices
- Always include unique branch parameters in Via headers
- Implement proper transaction timeout and retransmission
- Handle all SIP response codes appropriately
Common Pitfalls
- Forgetting to include branch parameter in Via headers
- Not implementing transaction retransmission timers
- Ignoring provisional responses
Resources
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