grandstream 486 fails after 5 mins

Hi,

my Grandstream works fine for out going calls.

ok for incomming calls for the first few mins after this no calls, how do i go about fixing this?

many thanks for all you input, S
simonkleynAsked:
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grbladesConnect With a Mentor Commented:
A couple of links which may help :-

http://www.voip.org.uk/forums/index.php?action=vthread&forum=6&topic=488
http://www.voipuser.org/forum_topic_957.html

I assume you have the home ADSL service from BT and therefore have a single IP address?
In this case you would use the router to enable multiple machines/devices to access the internet.
If this is the case you will need to forward the ports requires for the SIP protocol and RTP to the grandstream box and then still will need to configure the STUN server on the grandstream device.
If the router has a DMZ facility (which sends all unknown traffic to the device designated as the DMZ) then this is often much easier.
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grbladesCommented:
The grandstream is a hardware phone?
Have you tried looking to see if there is any newer firmware available for it?

What telephone system are you connecting it to?
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simonkleynAuthor Commented:

yes it's a hardware phone, no new firm ware, connected to a router

Simon
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grbladesCommented:
What voip service are you using for sending/receiving voip calls?
Or are you dialing the IP address of the remote phone directly?
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simonkleynAuthor Commented:


the phone connects directly into the grandstream box, this then connects to the router

so i guess the phone calls the grandstream this then calls the router etc

Simon
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grbladesCommented:
The grandstream must be configured to talk to a particular SIP gateway. What provider are you using?

What type of internet connection do you have?
Have you put the grandstream in the DMZ of the router?
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simonkleynAuthor Commented:

provider btconnect.com

connection broadband 512, next week 2M

probably ! , what's a DMZ when at home :-) !

S
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grbladesCommented:
btconnect is you ISP. What provider are you using for the VoIP service?
You have to configure the grandstream with a voice provider so that when you dial a number it knows where to connect to and they then connect you to the normal telephone service in the country you dialed.

DMZ is a standard feature of most home ADSL/DSL routers. What router are you using?
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simonkleynAuthor Commented:
provider is sipgate.co.uk

it dials out fine, it hust does not receive incomming calls after the first few minutes

router is etec GT 60 50

Simon
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simonkleynAuthor Commented:
I assume you have the home ADSL service from BT and therefore have a single IP address? yes
In this case you would use the router to enable multiple machines/devices to access the internet. yes

If this is the case you will need to forward the ports requires for the SIP protocol and RTP to the grandstream box and then still will need to configure the STUN server on the grandstream device.
that is prob the issue, i shall check the above link tomorrow, configuring the STUN server should be fun :-)


If the router has a DMZ facility (which sends all unknown traffic to the device designated as the DMZ) then this is often much easier.
i don't think the router has this facility

thanks for the links,

Simon
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simonkleynAuthor Commented:

all fixed, thanks for the info
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