Confirmed against a live install's pjsip.conf/extensions.conf that every endpoint falls back to context=intercom for messaging (message_context blank), and that [intercom] owns one exact-match per-device dial pattern regenerated on every dialplan rebuild. Rather than risk racing that, every endpoint now gets message_context=sip-messaging (patched into both of Easy Asterisk's device-creation code paths, plus a one-time migration for existing devices), routing messages to their own [sip-messaging] context gated on the existing pstn-permissions.conf messaging flag. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ho9mZgAkVpdz7S5wJkg8Nf