IP542N Wireless Deployment
Before you deploy your wireless router, ensure that it fulfills the following requirements:
Compatible chip solution
MTK chip, Ralink chip wireless router can be compatible with our IP542N. Of course you can also use other AP through the communication test experiment with our IP542N. We have found a manufacturer of AP can’t compatible our IP542N, which cause packet loss and jitter.
The wireless signal strength
The most appropriate phone signal strength should be in more than -60dbm. It must be above 70%.
The number of access equipment limits
Each AP allows access within 20 wireless telephones.
Independent voice wireless router
We just only allow wireless telephone access to unit , it is forbidden to other wireless devices, such as mobile phone, laptop access our voice wireless router. You must install the independent wireless router for the equipments.
Wifi channel selection
Figure 2: wifi channel
Due to the adjacent channel will influence each other, so we need to choose a channel that the channel itself and the adjacent channel are more free , such as the channel 8 and channel 13 in the figure 2.
After the channel connected , the speed of pinging telephone address generally should be within 10 ms.
Turn on WMM of the wireless router and sets the bandwith to 20M。WMM can improve the priority of the voice communication , the bandwidth set to 20M can reduce the conflict between frequency band.
Wireless router parameters
Failure 1: phone can't get IP address
Confirm your phone whether has wifi connected, you can found the menu on the LCD display whether ticking off the wireless SSID you connect. If not it shows a failure connection. And you can change the channel of your wireless router, see whether for channel selection result in failure connection with wireless router.
It still cannot get IP address if the wireless connection is successful, please check whether you have turned on the DHCP sever, and check whether the wireless router is assigned 192.168.1.X that this segment may conflict with phone LAN port address. Our IP542N has a default LAN address 192.168.1.1
Failure 2: phone can't register
First you must determine whether the address of the server is accessible. You can try to access the Telnet of the phone, then from the command line ping the address of the registered sever. If you can access the server, check your account. The legitimacy of the account itself can adopt the way of softphone confirmation, such as eyebeam. If you still can not registered with a right account , please follow the figure to saving log and send to our manufacturer technical support to analysis.
Failure 3: incoherent voice communication
In the case of incoherent call, you can try to direct dial the IP address of the other phone to determine the fault between wireless link and PBX.
You can also use the ping command to detect the response speed of the phone. The normal response speed should be less than 10ms. If the response speed is slowish, you need to check the wireless deployment issues in the first chapter