ProVu Communications IP Videophone The 2 minute guide for techies
Contents
1. ProVu Communications IP Videophone The 2 minute guide for techies Tim Bray July 30 2003 1 Introduction This is for people who really know what they are doing and want to get the BVP8770 working as fast as possible We expect that reading this you have either bought or are about to buy the BVP8770 IP videophone This is not intended to be a replacement for the user manual but to get the key points across to technically aware users very quickly 2 First of all Plug in the power Lan cable and external microphone if you have one Makesure you plug in the microphone before you turn the power on The IP Videophone uses the H 323 protocol 3 If you have Real IP addresses We mean static globally routable IP addresses All the phone needs to know is a IP address subnet mask and default gateway You put this in by pressing the ok button a few times and then pressing OK and left arrow to get out Just press ok at the password 4 If you are behind a NAT The phone uses UDP for communication UDP is connectionless and so doesn t get on well with NATs If it is at all possible plug in the phone to the Internet side of the firewall with its own real proper globally routable IP address not a private IP address If you must work behind a NAT this is where it gets tricky You need to tell the phone that it is behind a NAT tell it what its external IP address is 1 1 NAT is better one method Alternatively y2. ou can use the DMZ facility of some NATs or you can do some port mappings If the NAT claims to be H 323 aware then you are probably best to disable this feature It may help you for outgoing calls but is probably going to cause pain for incoming calls Some H 323 aware NATs only seem to recognise voice and not video 4 1 Port numbers These are the port numbers you need to map through if you are using the phone behind a NAT TCP 7000 7009 1720 1730 UDP 8050 8054 8056 8058 The port numbers printed in the user manual are incorrect for newer software version 5 Operation tips Use the up and down arrow keys while in a call to adjust the volume The bandwidth setting puts a cap on your transmit speed So you need to have an idea what sort of connection you have and what sort of connection the other end has If in doubt choose a lower setting It works much better when you aren t pushing the network to its limits When entering IP address the key puts the in To dial quick dials you pick up the handset press and then press the key for the quick dial you want If you want to make a test call then call 81 144 139 34 at 256kbit s 6 Feedback This document is being constantly developed The latest version can be found at http www provu co uk docs Comments or feedback is welcome and should be directed to tim provu co uk
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