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ZyXEL Communications P-2000W V2 manual

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Table of contents for the manual

  • Page 1

    P-2000W V2 VoIP wireless phone Troubleshooting Guide May 2005[...]

  • Page 2

    [...]

  • Page 3

    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. • Call server type and vendor. • Packet trace lo[...]

  • Page 4

    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. The P[...]

  • Page 5

    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. There are many methods to use this technology, the most common[...]

  • Page 6

    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. Since it was cr eated b[...]

  • Page 7

    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. 11. What[...]

  • Page 8

    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 . 3. Now all setting has been r eset to default. 16. What is th[...]

  • Page 9

    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. What should I do? Unable to register with the[...]

  • Page 10

    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. One of the b est way to see if the problem is cause by NAT or not is to put P2000W V2 on public network, (With p ublic IP and no NAT) see[...]

  • Page 11

    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. 6. I can make a call but the voice only go[...]

  • Page 12

    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. Packet tra ce is requested by support to analyze the prob lem. How should I setu p th e environment and how do I trace the packet? In such as you will need to se t[...]

  • Page 13

    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. 5. S top c a pt urin g and sav e th e ca p tur e d packet in f ile . Scenario[...]

  • Page 14

    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. Once both of the above capture is completed, send both captured [...]

  • Page 15

    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). STUN. Outbound Proxy. There are advantage and disadv antage [...]