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ZyXEL Communications P-2000W V2 manual How can I check if problem is cause by NAT or not?

Models: P-2000W V2

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P2000W V2 Troubleshooting Guide

2. How can I check if problem is cause by NAT or not?

There may not be an easy or quick answer to this question. One of the best way to see if the problem is cause by NAT or not is to put P2000W V2 on public network, (With public IP and no NAT) see if it work under such condition.

If you it can work on public network but can not work behind NAT than very likely your NAT gateway is not supporting SIP pass-through. In such condition you will need to consult your NAT router vendor for resolution.

3. If I've confirmed it is an NAT problem. What should I do?

If you are certain or confirmed the problem is caused by NAT you need to check the following.

1.Check if your NAT router vendor supports SIP pass-through.

2.If the NAT router does not support SIP pass-through, you need to consult your ITSP support if they support SIP outbound proxy. Since different NAT router vendor implement NAT differently. Typically ITSP may provide SIP outbound proxy to resolve NAT pass-through issues as sip proxy does not require the SIP client to do any modification as the server will modify the SIP message content according to the your WAN IP it sees. If your ITSP supports outbound proxy you need to obtain the configuration and configured the outbound proxy location on P2000W V2.

3.As mentioned some NAT may not be SIP friendly. ITSP may support STUN instead of SIP outbound proxy to resolve this issue. To use STUN sip client must support STUN client. How STUN work is when the user register the server will tell SIP client what the WAN IP the server sees from the SIP client and SIP client will use this IP as SIP content to identify its location.

4.Unable to register with the SIP server?

If you are unable to register with SIP server.

1.Make sure the Internet is reachable and the SIP register server is reachable. If your register server uses domain name make sure DNS name can be resolved.

2.Make sure the SIP account is correct and the password is correct.

3.Check if there is NAT router before it. If there are NAT router before it follow troubleshooting step above to verify if NAT is the cause of the problem.

All contents copyright (c) 2005 ZyXEL Communications Corporation.

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ZyXEL Communications P-2000W V2 manual How can I check if problem is cause by NAT or not?
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P-2000W V2 specifications

ZyXEL Communications P-2000W V2 is a versatile and robust VoIP (Voice over Internet Protocol) device designed for residential and small office environments. This compact and user-friendly product provides a multitude of features, enabling seamless communication and connectivity solutions.

One of the main features of the P-2000W V2 is its support for both wired and wireless connections. The device integrates IEEE 802.11b/g wireless technology, allowing users to connect their devices to the network without the hassle of cables. This makes it especially beneficial in environments where cable management is challenging. Additionally, it includes multiple Ethernet ports for wired connections, catering to various networking devices such as computers and printers.

The P-2000W V2 is equipped with a highly efficient VoIP engine, supporting both SIP (Session Initiation Protocol) and H.323 protocols, which enables users to make high-quality voice calls over the internet. It supports up to two VoIP lines, making it ideal for small offices that require two separate lines for enhanced communication capabilities. Additionally, the device features advanced Quality of Service (QoS) technology to ensure that voice traffic is prioritized over other types of data, resulting in clearer calls and a better user experience.

Another notable aspect of the P-2000W V2 is its security features. The device comes with robust security protocols such as WPA/WPA2 for wireless connections and advanced firewall capabilities to protect against unauthorized access. This ensures that users can communicate and share data securely.

The interface of the P-2000W V2 is designed for ease of use. It features a simple web management portal that allows users to configure network settings, manage VoIP accounts, and monitor call quality with minimal technical knowledge. This user-friendly approach makes it accessible for both tech-savvy individuals and those who may not be as familiar with networking equipment.

In conclusion, the ZyXEL Communications P-2000W V2 stands out as a powerful VoIP solution that combines wireless and wired connectivity, advanced voice technologies, and strong security features in a compact design. Whether for home or small office use, its versatility and ease of use make it a preferred choice for efficient communication and reliable internet connectivity. With its impressive specifications, it continues to be a reliable option for users looking to enhance their telecommunication capabilities.