>> at 60db attenuation the router is not a good idea
That is very strange as (certain) routers are normally much more stable, so its interesting to see that a pci-modem seems much better at attaining sync.
Ive not personally encountered a pci adsl modem, and they arent very common these days, and iirc were mostly used around the period 2002/2003ish when BT brought in the "self install". With having a network Ive always personally opted for a router - even back then- and any installs Ive done for others have either been router or ISP supplied usb modem.
I dont think I know anyone who has a pci adsl modem, and in view of their rarity these days, its therefore interesting to see your observations on how they perform on your own line.... since they kinda went out of "common usage" before the higher 1Mb/2Mb speeds and max dsl was brought in.
In view of the performance on your own line, I can well understand why you'd look at continuing to use the pci modem.
It may be interesting though, to see if you have a friend with a router who wouldnt mind swapping out routers for a couple of days, just to ensure that it wasnt that particular router.
>> One last question my internal modem syncs at 2350 using t1 mod and 1400 using g-dmt which is isp setting will this cause other problems thanks
This gets stranger and stranger.. adsl uses g.dmt modulation. T1 modulation is completely different and a maximum of around 1.5 Mb.
oooh stop... just had a thought... wonder if thats actually ANSI T1.413 modulation.
I dont actually know that much about ANSI T1.413 modulation aside from some basic investigation that I made into it about a year ago under what is known as
S=1/2 mode.
S=1/2 mode is the sole reason why some routers will sync at more than 7616 despite being interleaved. I only looked into it on the basis of how it treated
interleaving for that page... but iirc it combines 2 code words into one larger code word, and effectively increases maximum speed up to around 15Mbps.
Both the router/modem and DSLAM need to be able to support this mode. I'm not going to blindly tell you about something I dont know much about.. but.. having just had a look at who your ISP is, and the fact that they use LLU MSANs that are capable of adsl2 speeds, but throttle it back at a user level.. it could well be the reason why you can get higher speeds using this type of modulation. Sorry I cant give you any more info, aside from some routers (including some Netgears) can use S=1/2mode.