I have been working on this with SBC and have found the same conclusion. It works great from a dedicated POTS line. I can 4 digit dial and connect to RADS. It works within the same CO. it even works when dialing 9,xxx-xxxx. However, it will not work outside local CO. It works on only 2 of 18 sites outside local CO. Have a meeting of the minds next week. SBC/Nortel/Cisco
CO---Succession 1000(4.5)----Router----VOIP----Router----Norstar(7.0)