がとらぼ

CBSとETWSのメッセージ種類

J-ALERT(全国瞬時警報システム)が話題になってるけど、携帯・スマートフォンの緊急警報ってどうなってるのかなと思ったのでCell Broadcast Service(CSB)メッセージの種類の部分だけ見てみた。今回は3GPP TS 23.041 V14.1.0 (2017-06)から引用。日本語部分は勝手な追加。

10進 16進 意味
0 – 999 0000 – 03E7 To be allocated by GSMA(see GSMA AD.26 [25]). If a Message Identifier from this range is in the "search list", the ME shall attempt to receive such CBS message.
This version of this document does not prohibit networks from using Message Identifiers in the range 0000 - 03E7 (hex) for Cell Broadcast Data Download to the SIM.
1000 03E8 LCS CBS Message Identifier for E-OTD Assistance Data message.
1001 03E9 LCS CBS Message Identifier for DGPS Correction Data message.
1002 03EA LCS CBS Message Identifier for GPS Ephemeris and Clock Correction Data message.
1003 03EB LCS CBS Message Identifier for GPS Almanac and Other Data message.
1004 - 4095 03EC – 0FFF Intended for standardization in future versions of this document. These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
4096 - 4223 1000 – 107F Networks shall only use Message Identifiers from this range for Cell Broadcast Data Download in "clear" (i.e. unsecured) to the SIM (see 3GPP TS 11.14). If a message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
Not settable by MMI
4224 - 4351 1080 – 10FF Networks shall only use Message Identifiers from this range for Cell Broadcast Data Download secured according to 3GPP TS 23.048 [15] to the SIM (see 3GPP TS 11.14). If a message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
Not settable by MMI
4352 1100 ETWS CBS Message Identifier for earthquake warning message.
地震警報メッセージ
4353 1101 ETWS CBS Message Identifier for tsunami warning message.
津波警報メッセージ
4354 1102 ETWS CBS Message Identifier for earthquake and tsunami combined warning message.
地震と津波の複合警報メッセージ
4355 1103 ETWS CBS Message Identifier for test message.
The UE silently discards this message. A UE specially designed for testing purposes may display its contents.
テスト目的でコンテンツ表示
4356 1104 ETWS CBS Message Identifier for messages related to other emergency types.
その他の緊急タイプに関連するメッセージ
4357 - 4359 1105 - 1107 ETWS CBS Message Identifier for future extension.
4360 - 4369 1108 - 1111 Intended for standardization in future versions of this document. These values shall not be transmitted by networks that are compliant to this version this document. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
4370 1112 CMAS CBS Message Identifier for CMAS Presidential Level Alerts.
EU-Alert Level 1 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 0 Message Identifier.
Not settable by MMI.
大統領レベルの警報
4371 1113 CMAS CBS Message Identifier for CMAS Extreme Alerts with Severity of Extreme, Urgency of Immediate, and Certainty of Observed.
EU-Alert Level 2 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
きわめて重大(深刻)な警報で緊急且つ発生の確実性が高い(確実に、観測・発生した)
重大度:◎ 緊急度:○ 発生確実度:○
4372 1114 CMAS CBS Message Identifier for CMAS Extreme Alerts with Severity of Extreme, Urgency of Immediate, and Certainty of Likely.
EU-Alert Level 2 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
きわめて重大(深刻)な警報で緊急且つ発生の可能性のある
重大度:◎ 緊急度:○ 発生確実度:△
4373 1115 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Extreme, Urgency of Expected, and Certainty of Observed.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
とても重大な警報で緊急性が高いと思われ且つ発生の確実性が高い(確実に、観測・発生した)
重大度:○ 緊急度:○ 発生確実度:○
4374 1116 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Extreme, Urgency of Expected, and Certainty of Likely.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
とても重大な警報で緊急性が高いと思われ発生の可能性のある
重大度:○ 緊急度:△ 発生確実度:△
4375 1117 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Immediate, and Certainty of Observed.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
重大な警報で緊急且つ発生の確実性が高い(確実に、観測・発生した)
重大度:△ 緊急度:○ 発生確実度:○
4376 1118 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Immediate, and Certainty of Likely.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
重大な警報で緊急且つ発生の可能性のある
重大度:△ 緊急度:○ 発生確実度:△
4377 1119 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Expected, and Certainty of Observed.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
重大な警報で緊急性が高いと思われ且つ発生の確実性が高い(確実に、観測・発生した)
重大度:△ 緊急度:△ 発生確実度:○
4378 111A CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Expected, and Certainty of Likely.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
重大な警報で緊急性が高いと思われ発生の可能性のある
重大度:△ 緊急度:△ 発生確実度:△
4379 111B CMAS CBS Message Identifier for Child Abduction Emergency (or Amber Alert).
EU-Amber Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
子供の誘拐緊急事態
4380 111C CMAS CBS Message Identifier for the Required Monthly Test.
According to CMAS requirements (see 3GPP TS 22.268 [28]), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message.
月間テスト
4381 111D CMAS CBS Message Identifier for CMAS Exercise.
According to CMAS requirements (see 3GPP TS 22.268 [28]), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message.
訓練
4382 111E CMAS CBS Message Identifier for operator defined use.
According to CMAS requirements (see 3GPP TS 22.268 [28]), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message.
4383 111F CMAS CBS Message Identifier for CMAS Presidential Level Alerts for additional languages.
EU-Alert Level 1 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 0 Message Identifier for additional languages.
Not settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
追加言語向け:大統領レベルの警報
4384 1120 CMAS CBS Message Identifier for CMAS Extreme Alerts with Severity of Extreme, Urgency of Immediate, and Certainty of Observed for additional languages.
EU-Alert Level 2 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:きわめて重大(深刻)な警報で緊急且つ発生の確実性が高い(確実に、観測・発生した)
重大度:◎ 緊急度:○ 発生確実度:○
4385 1121 CMAS CBS Message Identifier for CMAS Extreme Alerts with Severity of Extreme, Urgency of Immediate, and Certainty of Likely for additional languages.
EU-Alert Level 2 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:きわめて重大(深刻)な警報で緊急且つ発生の可能性のある
重大度:◎ 緊急度:○ 発生確実度:△
4386 1122 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Extreme, Urgency of Expected, and Certainty of Observed for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:とても重大な警報で緊急性が高いと思われ且つ発生の確実性が高い(確実に、観測・発生した)
重大度:○ 緊急度:○ 発生確実度:○
4387 1123 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Extreme, Urgency of Expected, and Certainty of Likely for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:とても重大な警報で緊急性が高いと思われ発生の可能性のある
重大度:○ 緊急度:△ 発生確実度:△
4388 1124 CMAS CBS Message for CMAS Severe Alerts with Severity of Severe, Urgency of Immediate, and Certainty of Observed for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:重大な警報で緊急且つ発生の確実性が高い(確実に、観測・発生した)
重大度:△ 緊急度:○ 発生確実度:○
4389 1125 CMAS CBS Message for CMAS Severe Alerts with Severity of Severe, Urgency of Immediate, and Certainty of Likely for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:重大な警報で緊急且つ発生の可能性のある
重大度:△ 緊急度:○ 発生確実度:△
4390 1126 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Expected, and Certainty of Observed for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:重大な警報で緊急性が高いと思われ且つ発生の確実性が高い(確実に、観測・発生した)
重大度:△ 緊急度:△ 発生確実度:○
4391 1127 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Expected, and Certainty of Likely for additional languages. EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:とても重大な警報で緊急性が高いと思われ発生の可能性のある
重大度:△ 緊急度:△ 発生確実度:△
4392 1128 CMAS CBS Message Identifier for Child Abduction Emergency (or Amber Alert) for additional languages.
EU-Amber Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
追加言語向け:子供の誘拐緊急事態
4393 1129 CMAS CBS Message Identifier for the Required Monthly Test for additional languages.
According to CMAS requirements (see 3GPP TS 22.268 [28]), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message dependent on the language indicated in the CBS message and the language indicator settings in the ME.
追加言語向け:月間テスト
4394 112A CMAS CBS Message Identifier for CMAS Exercise for additional languages.
According to CMAS requirements (see 3GPP TS 22.268 [28]), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message dependent on the language indicated in the CBS message and the language indicator settings in the ME.
追加言語向け:訓練
4395 112B CMAS CBS Message Identifier for operator defined use for additional languages.
According to CMAS requirements (see 3GPP TS 22.268 [28]), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message dependent on the language indicated in the CBS message and the language indicator settings in the ME.
4396 112C CMAS CBS Message Identifier for CMAS Public Safety Alerts.
Settable by MMI.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
4397 112D CMAS CBS Message Identifier for CMAS Public Safety Alerts for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
4398 112E CMAS CBS Message Identifier for CMAS State/Local WEA Test.
Settable by MMI.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
4399 112F CMAS CBS Message Identifier for CMAS State/Local WEA Test for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see 3GPP TS 22.268 [28].
4400 - 6399 1130 – 18FF Intended as PWS range in future versions of the present document.
These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
6400 1900 EU-Info Message Identifier for the local language as defined in ETSI TS 102 900 [32].
6401 – 40959 1901 – 9FFF Intended for standardization in future versions of this document . These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
40960 - 45055 A000 - AFFF PLMN operator specific range. The type of information provided by PLMN operators using these Message Identifiers is not guaranteed to be the same across different PLMNs. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message. The MS shall discard messages in this MI value range unless received from HPLMN, EHPLMN or PLMN that is equivalent to HPLMN or EHPLMN.
45056 - 61439 B000 - EFFF Intended as PLMN operator specific range in future versions of this document. These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", then the ME shall attempt to receive this CBS message.
61440 - 65534 F000 - FFFE Intended as PLMN operator specific range in future versions of this document. These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", then the ME shall attempt to receive this CBS message.
Not settable by MMI.
65535 FFFF Reserved, and should not be used for new services, as this value is used on the SIM to indicate that no Message Identifier is stored in those two octets of the SIM. If this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message.
Not settable by MMI.

上のCBSのメッセージの内、ETWS(Earthquake and Tsunami Warning System)のメッセージは4352(16進1100h)〜4359(16進1107h)ということらしい。
地震(4352d,1100h)、津波(4353d,1101h)、地震&津波(4354d,1102h)、テスト(4355d,1103h)、その他(4356d,1104h)という5つしかないので選ぶの迷わなくてよさそう。(あと3つ予約有り)
その他のCBSメッセージを見ると重大度と緊急度と発生の有無？(発生の確実度)の組み合わせとさらに追加言語のそれらが入るので緊急事態の発生時に緊急警報を送る側が間違って選ぶ可能性がありそうに思える。超大急ぎのときにそんな分ける意味あるかね？

CBS(ETWS)とJ-ALERTのメッセージの対応ってどうなってるのか知らないけどミサイルの情報はその他(4356d,1104h)だよね？違うのかな。そのあたりの文書ってネットで見ないんだけど。

2017年9月3日追記:
ETWSの「その他(4356d,1104h)」は現在販売されているスマートフォンでは受信できないそうです。(今後も「その他」は配信されないという前提なのかしら？)
ETWSの地震(4352d,1100h)、津波(4353d,1101h)、地震&津波(4354d,1102h)だけは多くの機種で受信可能だそう。

自治体防災情報(docomoのエリアメール,auの緊急速報メールなど)は(40960-45055d,A000-AFFFh)のオペレータによる独自定義範囲を使用するらしい。日本のメーカーのスマートフォンの多く(一部?)だと予め利用できるように設定されてるようだけど、海外メーカーの俗にSIMフリースマホと呼ばれるものだと日本の自治体防災情報を利用できるように登録されていないので自分で設定するか、または設定できない機種では諦めるということになりそう。なお、設定しようにもメッセージIDの割当が不明なので何を設定すれば良いかわからないけど。

J-ALERTは結局よくわからんけどdocomoのエリアメール,auの緊急速報メールなどと同じように配信するようなので(40960-45055d,A000-AFFFh)を利用するっぽい。その中のどれかは不明。

2017年9月5日追記:
(40960-45055d,A000-AFFFh)の中でJ-ALERTと自治体防災情報にされているメッセージID
Docomo: 40961d,A001h   40962d,A002h   41872d,A390h〜41983d,A3FFh
KDDI: 40962d,A003h
Softbank: 43008d,A800h   44032d,AC00h〜45037d,AFEDh   45031d,AFEEh
ただし、船橋市の防災訓練でと書いてあるので他の地域で、本番と訓練で違うのか不明。
情報源: IIJmio meeting 12 災害とMVNO (ETWS動作検証)

家庭用無線LANルーター WN-AG450DGRが壊れた

2011年末に発売されたアイ・オー・データ機器のWN-AG450DGR。主力モデルではなかったみたいだし「初の450Mbps対応モデル」みたいなスペオタ歓喜なウリがあったわけでもなく本当に何も考えずに買うような人を対象にしたと思われる製品。
ひねた性格なので何故かこういうのを買いたくなることがあって購入。しかもわざわざ販売開始日を狙って。
ヨドバシAKIBAの売り場に行ったら発売初日だというのに棚の一番下の奥に「1年くらい売れずにここに居るのでもうそろそろ売り場から外されそうよ」みたいな感じで置かれてた。さすが非主力モデル、ヒドい扱い。(5年以上前なのにこれは凄い記憶に残ってる)
で、設定項目が殆どないので弄って遊び倒すとかもなく、普通に安定してたので手間がかかるということもなく、ただ普通に無線APとして使うだけの存在だった。安定してナンボな機器なのでそれでいいんだけど。
それがこの数カ月ほど急に不調になって2.4GHz,5GHz共に通信がブチブチ切れるようになった。電波弱ってたし。そして、数日前にとうとう2.4GHzの電波が全く出なくなった。
電源投入後のログを見るとどうもルーター自身は2.4GHzの電波も出してるつもりっぽいので、どうやら異常を検知出来ていないらしい。機械の故障ですかね？まぁ5年以上使ったので壊れても文句はない。

ログ: (下が古く上が新しい)
Aug 29 09:19:12 [SYSTEM]: FWCHECK, No Firmware Available
Aug 29 09:19:12 [SYSTEM]: FWCHECK, start new firmware version check
Aug 29 09:18:16 [SYSTEM]: WLAN[5G],AutoChannel change to 44
Aug 29 09:18:12 [SYSTEM]: WLAN[5G],Available Channel: [36, 40, 44, 48]
Aug 29 09:18:11 [SYSTEM]: NTP, Local time=2017/08/29 09:18:11
Aug 29 09:18:11 [SYSTEM]: NTP, Daylight saving status: Disable
Aug 29 09:18:11 [SYSTEM]: NTP, Time zone = +9.0 Osaka, Sapporo, Tokyo
day  2 09:18:09 [SYSTEM]: WLAN, start LLTD
day  2 09:18:09 [SYSTEM]: HTTP, start
day  2 09:18:09 [SYSTEM]: NET, Firewall Disabled
day  2 09:18:09 [SYSTEM]: NET, NAT Disabled
day  2 09:18:09 [SYSTEM]: SCHEDULE, Set LAN Link Rate to 1000Mbps
day  1 00:00:04 [SYSTEM]: SCHEDULE, Set LAN Interface Up
day  1 00:00:03 [SYSTEM]: WLAN[2.4G], Channel = AutoSelect
day  1 00:00:03 [SYSTEM]: WLAN[2.4G], CountryRegion = 0
day  1 00:00:03 [SYSTEM]: SCHEDULE, LED On
day  1 00:00:03 [SYSTEM]: SCHEDULE, 5G Wireless Radio On
day  1 00:00:03 [SYSTEM]: NTP, start NTP Client
day  1 00:00:02 [SYSTEM]: WLAN[2.4G], Channel = AutoSelect
day  1 00:00:02 [SYSTEM]: WLAN[2.4G], CountryRegion = 0
day  1 00:00:02 [SYSTEM]: WLAN[5G], Channel = AutoSelect
day  1 00:00:02 [SYSTEM]: WLAN[5G], CountryRegion = 0
day  1 00:00:01 [SYSTEM]: LAN, IP address=192.168.0.246
day  1 00:00:01 [SYSTEM]: LAN, start
day  1 00:00:01 [SYSTEM]: BR, start
day  1 00:00:01 [SYSTEM]: SYS, Application Version: 1.08

廃棄する前に開けてみた。
背面(SSID関係の情報が書いてあるシールのある面)のネジを4本抜いて外周の溝にテレホンカードみたいなのを挿してぐるりと滑らして爪を外せばカバーはカバァと外れる。これは簡単

WN-AG450DGRを分解1
基板のオモテ側。意外と大きなヒートシンクが2つあるのが目に付く。上の方のCHDSと書かれた黒茶色のチップは不明。
電解コンデンサーは全く膨らんだり破裂した様子はなく、基板に錆があったり粉が吹いてるとかもないので見た目では異常があるとは思えない。

WN-AG450DGRを分解2
ヒートシンクを外してみた。基板裏面のヒートシンクの留め爪をラジオペンチで挟むだけで簡単に取れる。その後のグリス取りが大変だけど。

WN-AG450DGRを分解3
左のRalink RT3883Fと書かれたチッブがSoC。
• MIPS74Kc 500MHz 64K Iキャッシュ, 32K Dキャッシュ
• 16/32ビット SDRAM 128MB迄
• 16/32ビット DDR2 DRAM 256MB迄
• 3T3R 2.4/5 GHz with 450/450Mbps PHY data rate
• 5GHz: 16dBm
• 2.4GHz: 18dBm
• AP Firmware: Linux 2.6 SDK, VxWorks 5.5bsp
• iNIC Driver: Linux 2.4/2.6

WN-AG450DGRを分解4
1つ前の画像の右のチップは上から見ると何も書いていないように見えたので横からライトを当てた。かろうじてATHEROS AR8327-AL1Aという文字が読める。

Gigabit対応のL3スイッチ(7ポート迄)のコントローラーチップらしい。
• One GMII or two RGMII MAC interfaces
• Single SERDES/SGMII Interface
• 5 integrated 10/100/1000Base-T PHYs with integrated termination for the MDI interface
• Supports IEEE 802.3az standard
• Atheros ETHOS-Designed Green Ethernet (EDGE™) power saving modes
• QoS support with four traffic classes based on port, IEE802.1p, IPV4 TOS, IPV6 TC and MAC addresses
• Full VLAN support including QinQ and VLAN tag insertion and removal, with IVL and SVL
• VLAN translation and mapping
• Line rate hardware NAT (AR8327N)
• Hardware IGMP V1/2/3 and MLD V1/2 snooping, join and fast leave
• 96 Custom ACLs and rule based counters
• Ingress and Egress rate limiting and bandwidth control
• Broadcast storm suppression

WN-AG450DGRを分解5
基板は7016A0478008 Ver:1.00ということらしい。その上のNANYAのチップはNT5TU32M16DG-ACという型番からすると32Mb x16 = 64MBのDDR2 SDRAM。

WN-AG450DGRを分解6
基板の上に垂直に立ってる金属板は大きさからすると5GHzの(逆F型)アンテナっぽい。その右下のレセプタクル(黒い丸い穴)は外部アンテナを繋げるためのものじゃなくて検査用の筈。

WN-AG450DGRを分解7
基板のパターンでミアンダ形状(グニャグニャ部分)の部分(画像の赤丸2つ)がおそらく2.4Hz用のパターンアンテナ。それぞれすぐ近くにレセプタクルがあるのでたぶん合ってる筈。その部分の基板の裏側も見たらアンテナだよねと思う。

WN-AG450DGRを分解8
基板の裏側。2.4GHzのアンテナはこの画像では上側中央付近。

きれいな基板してるだろ。ウソみたいだろ。死んでるんだぜ。これで。(2.4GHzだけ)

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