Mutiple MTA's on the same network

Posts: 7 · New Forum Member Joined: Apr 04, 2005 Posts: 7

Guys,

I have about 10 MTA's on the same network. Because of this I can not set up port forwarding since the same port can not go to different IP addresses. Vonage states you can have mutiple devices (unlimited) on any network. This of course is dependant on your available/supplied bandwidth from your ISP, and your pool of IP's. Anyone have mutiple MTA's on the same network that operates with no issues? I have issue where the MTA's loose there connection? I am forced to reboot the MTA and it starts working fine. When they are working I can have them all going at the same time but some of them eventually start blinking and needs a reboot.

Thanks...

Posts: 17 · Vonage Forum Associate Joined: Feb 10, 2005 Posts: 17

The maximum number of Vonage lines you can have on one IP address is 10. If there is only one line on each of those 10 ATAs, you'll be alright. If there are more than 10 lines running on your network, you'll need multiple IPs from your ISP.

You NEED to call a Vonage Service Rep and have them program different ports on each one of your lines (ports 6050-6060... I think one port is always reserved for a softphone). After this, each one of your lines will have its own port and will be able to received calls without interruption.

What is your bandwidth? for 10 vonage lines at the highest quality, you'll need a pretty fat pipe (900 kbps up and down... I'd have 1.0+ mbps up just for some play room). At the lowest quality, you'll need about 300kbps + some room for play. make sure your latency and QoS are good. Do you have any Fax lines? Those lines MUST run at the highest voice quality...

My #1 question to you is: how did you get 10 ATAs without thinking about the network they'll be on? If you're planning on operating a business on 100% vonage, you should know exactly what you're doing...

I run an office with 5 Vonage lines and 4 ATAs... We have two DSL lines running at 1.5mbps/384kbps load balanced. For redundancy, we have two fail over landlines.

Posts: 7 · New Forum Member Joined: Apr 04, 2005 Posts: 7

???????

I dont see why there is a limit of 10 lines per static IP from my provider? You can have hundreds of users on the same network all surfing the internet at the same time and they all use port 80. There is no need for port forwarding to each IP address, and setting up a unique port for every computer on the network that uses http? Your router is still able to NAT without issues and knows what IP address the packets need to go to since its written into the packet header during NAT. I thought SIP uses ports 5060 to 5063 with 5062 and 5063 being unassigned?? Where did you get 6050 to 6060 from? Range 6000-6063/tcp is for X Window Systems?

I have a 3 x 1.5 line and have had 10+ lines going at the same time over Wireless. So bandwidth is not an issue since I also run them all at 30k.

The reason I bought the lines was not for business phones it was for VoIP over Wireless testing. I know what i'm doing just not exactly what i'm doing.

Can you explain your first statement to me and explain why the limit of 10 MTA's per Static IP? You seem to know what your talking about?

Posts: 17 · Vonage Forum Associate Joined: Feb 10, 2005 Posts: 17

sorry, I typed the port numbers wrong; they are 5060 and then the 10 right after that. I was told port 5060 is reserved for a Softphone line.

the limit on the number of lines you can have is set by Vonage, not your ISP. Each Vonage account is only allowed 10 lines. however, I'm sure its very possible to open up another account to obtain more lines. or just talk to a sales rep and see what they can do for you.

I believe the only reason you need a port specific to each line is so that the Vonage servers can initiate multiple inbound connections when you're receiving calls... (When surfing http, all requests are outbound, I think). Did you say you have multiple IPs from your ISP? If this is the case, you don't need to map any ports as long as each device is getting its own public IP.

If you don't have multiple public IPs and want more than 10 lines, I've heard of Vonage mapping alternative ports outside the range of 5060-5070... They do this in special cases if they believe some IPS are blocking SIP ports.

At the office we are using ports 5061-5065 just so you know. In the beginning, the ATAs would lose their connections during simultaneous calling, but this was because they were all sharing the same SIP port and there was a problem with our Dual WAN Router.