HTTP 200 OK vs SIP 200 OK
HTTP and SIP both use 200 OK to signal success, but the implications are very different. In HTTP, 200 OK completes a request-response cycle. In SIP, 200 OK to an INVITE establishes a media session (phone call) and requires an ACK to complete the three-way handshake.
Deskripsi
The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
Ketika Anda Melihatnya
The most common HTTP response — indicates the request was processed successfully.
Cara Memperbaiki
No fix needed. The request succeeded as expected.
Deskripsi
The request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
Ketika Anda Melihatnya
When a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
Cara Memperbaiki
No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions.
Perbedaan Utama
HTTP 200 completes the transaction — the response body contains the requested data.
SIP 200 to an INVITE starts a dialog (call session) that requires an ACK from the caller to finalize.
SIP 200 includes SDP (Session Description Protocol) body describing the media session (codecs, ports, IPs).
HTTP 200 is stateless per request; SIP 200 creates stateful dialog state that persists for the call duration.
SIP 200 to REGISTER confirms registration; SIP 200 to BYE confirms call termination — context matters.
Kapan Menggunakan Yang Mana
In HTTP, return 200 for any successful request that includes a response body. In SIP, a UAS sends 200 OK to accept an INVITE (answer the call), confirm a REGISTER, or acknowledge a BYE. The caller must ACK a 200 to INVITE within 64*T1 seconds or the session is torn down.