IP電話で匿名通話を拒否する方法は?

はじめに

概要

電話機には迷惑電話や非通知不明番号からの着信が不定期に発生します。これらの不要な着信を拒否するため、非通知着信を自動遮断する設定が可能です。

対応機種

弊社の全ての電話機モデルに対応しています。

対象者

本資料は、本体内蔵ファイアウォールと通話制御設定を活用し、非通知着信を拒否する設定を行うユーザー向けです。

解決方法

方法1:ファイアウォールルール設定

1. 電話機のWeb管理画面にログインし、“Security” -- “Network Firewall” -- “Firewall Settings”を開きます。“Input/Output”を Input、“Deny/Allow”を Allowに設定、プロトコル種別は初期値のままにします。“Source Port Range”に 0-65535、“Source Address”にサーバーIPアドレス、“Source Subnet Mask”にサーバーIPのサブネットマスクを入力し、“Add”をクリックします。続いて“Firewall Rule Settings”にて“Enable Input Rules”にチェックを入れ設定を保存します。
Configure firewall rules 
2. 同画面に追加ルールを作成し、PBXサーバー以外の全IP通信を遮断します。設定内容は下記画像の通りです。

Block all IP addresses except the server IP from sending data to the phone
補足:上記設定完了後、PBXサーバー(172.18.1.88)以外の機器は電話機と通信できなくなり、交換機からの正規の通話のみ受信可能となります。

方法2:厳格UA照合を有効化 + 非通知着信拒否

1. Web画面より“Line” -- “SIP” -- “Global Settings”を開き、“Enable Strict UA Matching”を有効にします。
Enable Strict UA Matching
2. 続けて“Line” -- “Advanced Settings”を開き、“Reject Anonymous Calls”にチェックを入れ、設定を送信して保存します。
Reject anonymous calls

カタログ
顧客サービス 電話
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