说明：
列出托管 PBX 的路由目标URI:
https://api.multitel.net/hpbx/destinations/{operation}/{billing_code}
参数:
Required:
{operation} - 'get'
{billing_code} - your hosted pbx billing code
方法：
POST
示例输出：
curl -x POST https://username:password@api.multitel.net/hpbx/destinations/get/75823891{ "status": { "code": "200", "msg": "List Destinations" }, "response": [ { "code": "EXT-10071", "label": "Dial 100 - extname358" }, { "code": "EXT-10111", "label": "Dial 101 - extname23458ext101d" } ]}