nrb501 wrote: If, as you have stated, the modem is failing to sync there is a fundamental issue at work here, with the modem modulation mode set to "auto" it should sync.

nrb501 wrote: Firstly, what are the line stats with the v120? (I assume you are able to communicate with the modem) it is possible if you are on a marginal line the v120 may be (just) able to sync but the v130 will not. If the line stats are reasonable then it suggests the modem may be faulty.
Try swapping the cable from the telephone socket to the modem as well.

[TBH, if you have a marginal line and want the best speed possible then the v120/v130 may not be the best choice as Draytek's sync strategy seems conservative in these cases. (My ADSL connection is on the wrong end of a very long line from the exchange and I find a Netgear DM111P gives good sync speeds with the added ability to adjust the target snr.)

nrb501 wrote: VPI/VCI should be set to 0/38, although if wrong I don't think that should stop the modem from syncing.

nrb501 wrote: Draytek knowledgebase article 452 http://www.draytek.co.uk/index.php?option=com_content&view=article&id=452 should give you all the settings you need.

Piste Basher wrote: If you have been using a 120 then it must be adsl. However there is no reason why the 130 shouldn't work - assuming that the Airport is set to use PPPoE and has the zen credentials in it. You have bought a UK spec 130? Some folk on here have acquired non-UK 130's which are somewhat different....

admin3 wrote: The Vigor 130 should be quite compatible with ADSL lines and out of the box, it does work just like the Vigor 120 modem.

Can you check whether it's an Annex A or Annex B model of the Vigor 130? The UK uses Annex A for ADSL/VDSL.
The [Dashboard] of the modem (click on the DrayTek logo) shows the annex type:

Code:

DSL Version - 576D17_A/B/C HW: A

nrb501 wrote: A snr of 12dB would indicate that BT's line management system has increased this from the default of 6dB due to it registering large numbers of errors or line drops.

The figures for downstream attenuation and linespeed will give an indication to the quality of the line.

https://www.btwholesale.com/includes/adsl/main.html should give you an idea of what speed to expect from the line..

nrb501 wrote: Try the alternate firmware from the uk support page or the 3.8.1.2_STD firmware from the .com website. The x_BT firmware is only really optimised for VDSL lines. I've found on both a 2860 and 2760 that on an ADSL (as opposed to VDSL) line the STD firmware gives better sync speeds.

nrb501 wrote: If none of this works, have you got a friend on whose line you could try the modem to see if it syncs - if it doesn't then its a sure bet the modem is faulty.

nrb501 wrote: Regards your dealings with Zen, I know its frustrating going through their faultfinding scripts but sometimes it can be worthwhile as you may find an existing problem.