We currently have Lancom 1711 VPN routers on each site, connected to the central office.

Previously, the central office had a normal T-DSL line (2mbps down, 764kbps up) and an S-DSL line (2mbps synchronous). We are now upgrading the S-DSL line to 10mbps synchronous. I pointed out, that it didn't make much sense to have the second T-DSL line for failover (which is why they had previously kept it), because it runs out the building in the same place, into the same cable bundle, back to the same exchange! If one cable goes tits-up, the other will most likely also go - the same if the exchange has a problem.

I therefore suggested, that we go with a S-DSL and UMTS failover - the UMTS won't be that quick, and we'd chew through our 5GB "unlimited" relatively quickly, but if we restricted it to essential services, we could probably do a day or 2, while the main line was repaired.-

Lancom do the 1751 UMTS Annex. B router, which would probably meet our requirements.

Has anybody else any experience in this area (saspro?) and can say whether the Lancom is good or not, or if there is a better solution. It would have to be compatible with the other Lancom devices at the other offices, at least to start with, I don't have the budget to rip out the routers in each office and replace them...

The Lancom 1751 has an ADSL2+ modem in it not an SDSL modem.
Is the 10Mb connection a leased line or bonded SDSL?

Bonded SDSL, we currently have a Lancom 1711 on the 2mbps SDSL connection, although I think that is attached to the modem (need to double check). I hope the Lancom can run in passthru mode, like most other DSL Router/Modems I've used, if the modem part isn't compatible...

The 1711 has a WAN port, The 1751 had a phone connection for ADSL.

I think you're going to need the LANCOM 3850 UMTS & a dongle/card

Thanks, I'll give it a look.

hi Big_D

Just another thought but for a flexible failover solution have you thought about 3G?
Draytek do very reasonably priced model and data plans are available on a PAYG service i.e. you only pay for it when you invoke. depending on your coverage area you should be able to meet or exceed existing bandwidth and its is completely diverse from an entry and infrastructure point of view.

UMTS is 3G

Yeah, I was looking at a couple of Drayteks yesterday, just happened to stumble upon a couple of reviews, thanks anyway for the suggestion.

my bad... can i plead lack of caffeine?

thats what i get for skimming the previous posts...