uploads start out at top speed but after 30secs drop down

[franko123]

not sure what is the contributing factor for this.

i'm using a billion 7800n adsl2 router

have ports forwarded and firewall exceptions for incoming and outcoming connections on tcp/udp for the ports designated to utorrent with upnp and nat-pmp switched off in utorrent as it's not necessary since i've got the ports forwarded in the router

what happens is if i open utorrent the torrents start uploading at max speed as it's set to unlimited but after 30 secs - 1min it'll be uploading at < 5kb's

is this isp throttling me or is it my router or my pc?

[Switeck]

I don't know if it's ISP throttling, but did you allow ANY outgoing port or outgoing port destination or ANY remote incoming port?