I have a MICS 7.0 with PRI and ever since we cutover to Cox service on their Cisco virtual soft switch... my RAD will only connect only for 45 seconds and drop.Looks like DID call rides on their new SIP trunks across country. Changed RAD and baud rates will no luck. Tier III support claims its the LEC dropping them. Never had issues with Integra PRI over 3 years. Also,we have 3-ASM's for tenant faxes/C/C and no issues. Is POTS only answer?