Hello

I’m not exactly sure where to post this but I have a customer who recently switched over to RCN Hosted

Their phones seem to be working fine however, they have five Grandstream ATA’s four of them are for their gate intercoms that they use at each door
The other one is for Paging

They were working fine at one point but now they’ve all stopped working

RCN

Is saying that it has something to to do with the customers network

All five ATA’s are plugged into an eight port switch with one cable going to their net work

When I plug my buttset in I get dial tone but you can’t make a receive any phone calls internal or external


I can plug my laptop into the switch and get Internet access



I’m just wondering if anybody’s familiar with this grand stream product & RCN

Thanks

JD