Yasid Ramli ยท BlogPortfolio and technical notes by Yasid Ramli, Tech Lead UC & Contact Center, CCIE Collaboration. Cisco UCCE/PCCE, CUCM, CVP, and voice engineering.https://blog-1bz.pages.dev/enThree SIP Response Codes That Mislead You Most Oftenhttps://blog-1bz.pages.dev/blog/sip-response-codes-that-mislead/https://blog-1bz.pages.dev/blog/sip-response-codes-that-mislead/Standalone chapter: 403, 480, and 503 get read backwards during trunk troubleshooting. Here is what they usually mean.Wed, 11 Mar 2026 00:00:00 GMTsipvoicetroubleshootingReading a UCCE Routing Script Without Guessinghttps://blog-1bz.pages.dev/blog/ucce-02-reading-routing-scripts/https://blog-1bz.pages.dev/blog/ucce-02-reading-routing-scripts/Second chapter: how to walk a routing script node by node, and which variables deserve a look before anything else.Tue, 03 Feb 2026 00:00:00 GMTucceciscoroutingWhy UCCE Architecture Comes Before Touching a Scripthttps://blog-1bz.pages.dev/blog/ucce-01-why-architecture-comes-first/https://blog-1bz.pages.dev/blog/ucce-01-why-architecture-comes-first/Opening chapter: a map of the UCCE components, and why knowing the data path first saves hours of troubleshooting later.Thu, 15 Jan 2026 00:00:00 GMTucceciscoarchitecture