At the physical/data link layers, all VDSL2 chipsets should be compatible with the FTTC service from BT Openreach. However, the firmware of a modem/router can be locked to a particular provider - e.g. AT&T, Bell, BT, DT, etc..
As for combining the functions of a modem and a router - there are question marks over the capabilities of a single device to perform those two tasks, especially at speeds of 80Mbps (17MHz profile) and perhaps even higher (e.g. a 30MHz Profile.)
AT&T is shipping combined modem-routers to its VDSL2 U-Verse customers in North America. These devices, imvho, are superior in performance to the Huawei HG612 / ECI B-FOCuS supplied as FTTC CPE by BT Openreach.
Yet AT&T customers are still complaining that the modem-routers cannot cope with the relatively light loads from their home networks. Routing the traffic for a handful of networked devices is reportedly enough to crash the U-Verse modem-router or grind it to a complete halt.
AT&T has yet to fit an 802.11n wi-fi chipset to its U-Verse modem-routers.. They are still relying on an Atheros 802.11g chipset. That either tells us something about the true throughput of wi-fi, or the AT&T FTTC service!
EDIT: It seems that only four VDSL2 CPE solutions are readily available. Surprisingly few..
- Broadcom 6368 (1)
- Lantiq (was Infineon, was TI DSL Solutions) VRX200 (2)
- Ikanos (was Conexant) Accelity (3)
- PMC-Sierra PM4380 (4)
Ralink (which bought TrendChip in 2010) was reportedly on the brink of launching its own VDSL2 CPE chipset - the RT65168. However, in March 2011, Ralink was swallowed up by Mediatek who seem to have scuttled the plans. (5)
Edited by asbokid (Sat 05-May-12 00:32:55)