运营商与中继管理

1. SIP 中继配置

Wholesale 的中继分为两层：

1.1 基本 SIP 中继

# config/trunks/carrier_a.toml
[[trunk]]
name = "carrier-a"
dest = "sip:10.0.1.100:5060"
backup_dest = "sip:10.0.1.101:5060"  # 备用地址
direction = "outbound"
codec = ["pcmu", "pcma", "g729"]
max_calls = 100
max_cps = 20
weight = 100

# 入向认证
[trunk.auth]
username = "myaccount"
password = "mypassword"
realm = "carrier-a.com"

# 出向注册（如运营商要求）
[trunk.registrar]
enabled = true
username = "myaccount"
password = "mypassword"
expires = 3600

1.2 入向中继（从运营商接收入局呼叫）

[[trunk]]
name = "carrier-a-inbound"
direction = "inbound"
inbound_hosts = ["10.0.1.100", "10.0.1.101"]  # 仅允许这些 IP
codec = ["pcmu", "pcma"]
max_calls = 200

1.3 双向中继

[[trunk]]
name = "carrier-b"
dest = "sip:10.0.2.50:5060"
direction = "bidirectional"
inbound_hosts = ["10.0.2.50"]
codec = ["pcmu", "pcma", "g722", "g729"]
max_calls = 500

2. Wholesale 中继配置

在 Web 控制台 Wholesale → 中继管理 中为每个中继设置：

2.1 号码改写规则

每个中继可以配置出向号码改写：

{
  "caller_strip": 0,
  "caller_prepend": "",
  "callee_strip": 0,
  "callee_prepend": "0",
  "callee_regex": ""
}

改写管道：原始号码 → strip → prepend → regex

3. 中继健康检查

3.1 OPTIONS 探测

RustPBX 核心支持对中继目标发送 SIP OPTIONS 进行可达性检测：

[[trunk]]
name = "carrier-a"
dest = "sip:10.0.1.100:5060"

[trunk.health_check]
enabled = true
interval_secs = 30
timeout_secs = 5
max_failures = 3

3.2 Wholesale 熔断器

Wholesale 模块提供更强大的 三态熔断器：

Closed ──(连续 N 次失败)──► Open ──(等待冷却)──► HalfOpen ──(探测成功)──► Closed
                                    ▲                                │
                                    └──────(探测失败)────────────────┘

在控制台 Wholesale → 监控限流 中可查看所有中继的熔断状态，手动重置或启用/禁用。

4. 多中继负载均衡

当路由策略中同一优先级有多个中继时：

配置示例——同一优先级双中继：