I have a Cisco SPA504G phone that is connected to a remote PBX.
I have configured 2 accounts on the phone-ext. 502 and ext. 506, both on the same PBX.
If i activate both accounts, either both become unreachable, or register but are not stable.
If I disable second account 506 and restart phone, 502 stays registered.
I tried setting different UDP ports to register (5061 to 502 to 5062 to 506), tried different settings on my router (Thomson TG585 v7) but nothing help.
I read in some forum about such issue on this phone module and the only work around was-disable second account, which worked.
I need both accounts.