ZyXEL CommunicationsメーカーP-2000W V2の使用説明書/サービス説明書
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P-2000W V2 VoIP wireless phone Troubleshooting Guide May 2005.
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P2000W V2 Troubleshooting Guide Table of Contents iii Customer Support Please have the following information ready w hen you contact customer support. • Product model and serial number. • Firmware version of your device. • Brief description of the problem and the steps you took to solve it.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. Introduction The Prestige P2000W V2 is a SIP-based Vo IP wireless pho ne. Sending v oice signals over the Internet is called Voi ce over IP or VoIP. Session Initiated Protocol (SIP) is an internationally recognized st andard for implementing SIP.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. 1. What is VoIP? Voice ov er IP is an eme rgi ng te chno logy base d on op en stan dar ds of IEEE, fundamentally the Internet Protocol that allows voice data to t ravel across the Internet.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. 6. What is the difference between H.323 and SIP ? H.323 and SIP are propose d by different group Session Initiation Protocol (SIP) is a standard introduced by the Internet Engineering Task For ce in 1999 t o carry voice over IP.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. Voice quality is most commonly rated through a voice quality metric called the Mean Opinion Score (MOS) whic h is recommen dation by ITU-T. The MOS is a 5 point scale where 5 represent excellent voice quality and 1 represent bad voice quality.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. 1. Power off the device. 2. Keep ho ld down the Power and Left-S electo r button until you see <<Load Default>> <<Factory>> words in the LCD scre en than release it .
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. 19. Can P2000W V2 support STUN? Yes, P2000W V2 can support STUN. VoIP Troubleshooti ng Is it a hardw are prob lem? How can I check if problem is cause by NAT or not? If I've confirmed it is not an NAT.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. 2. How can I check if problem is c ause by NAT or not? There may not be an easy or quick ans wer to this question.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. 5. I can register but can not establish a call? If you can register to server but can not make a call v ery likely there is NAT router before it, please see NAT related question above for tips to troubleshoot.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. 9. The support tells me, I may have an interope rability issue with my ITSP call server.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. 3. Start packet sniffing software and start packet capturing. 4. St art P2 000W V2 a nd mak e a com plete cal l from re giste ring to ca lli ng a party until problem appears.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. The corrected working capture should include starting of the call (The SIP invite) to call pickup (The SIP ACK). An example of succe ssful call capture is listed below for your reference.
P2000W V2 Troubleshooting Guide All contents copyright (c) 2005 ZyXEL Communications Corporation. Fortunately, there are already ways to wo rkaround the NAT for SIP. The most commonly used w ay is listed b elow. SIP pass-through support on NAT router (re quire router vendor implement it).
デバイスZyXEL Communications P-2000W V2の購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
ZyXEL Communications P-2000W V2をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはZyXEL Communications P-2000W V2の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。ZyXEL Communications P-2000W V2の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。ZyXEL Communications P-2000W V2で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
ZyXEL Communications P-2000W V2を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はZyXEL Communications P-2000W V2の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、ZyXEL Communications P-2000W V2に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちZyXEL Communications P-2000W V2デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。