For the ability to maintain a connection under the difficult circumstances you have described, there are two devices that I would recommend trying --
- A Type 2, BT Business Hub, Ver 2.0 (a.k.a. a 2Wire 2700HGV)
- A Type 2, BT Business Hub, Ver 3.0 (a.k.a. a 2Wire 2701HGV-C)
No doubt
Walter will be able to provide some advice, based on his practical experience with decaying infrastructure in bucolic surroundings. (A.k.a. the village of Ewhurst, Surrey, normally referred to as
Ewhurstshire by a certain pesky feline.
)
If you are happy with your DG834, then perhaps the
Broadcom based
Netgear DG834Gv4 (note: the v4 and not the last of the production run, the v5) may also prove to be adequate?