Hi ,
It can seem dumb , but I’ve just played/discovered the ATA 187 ( which is working in SIP) . while I was trying to enter in the IVR menu , I was prompted for a password that we have not in the past.So after one or two google line , I finally discovered that the default password is cisco ( yeah I know , they are very hard 🙂 ) , so in numeric it is giving you 24726.
numb advise of the day 🙂 lol