; RTP 端口段: 每呼叫占 2 个端口对 (被叫腿 + externalMedia 腿, 各含 RTCP) ; 10000-10800 = 800 端口 ≈ 200 并发呼叫/节点 [general] rtpstart = 10000 rtpend = 10800 strictrtp = no