drostoker is right, the SIP User ID don’t have to be the same as Authenticate ID.
SIP Account usually have below IDs:
- SIP User ID is the identity for the PBX to reorganize every user.
- SIP Authenticate ID is the ID that used for registration. which is usually bind with a password.
Be aware the some SIP account have an:
- SIP Caller ID, which is used for dialing or receiving incoming calls.
For an extreme example:
SIP account 1:
- SIP User ID: grandstream1 (let the PBX know who you are)
- SIP Authenticate ID: xYlkDIKDF93kCDK (used to register)
- SIP Authenticate Password: 123456 (used to register)
- SIP Caller ID: 6778 (used to dialing and receiving calls)
SIP account 2:
- SIP User ID: grandstream2
- SIP Authenticate ID: kafdpoaihYe
- SIP Authenticate Password: 123456
- SIP Caller ID: 6779
So when you want to call SIP account 2, you do not dial the granstream2 or kafdpoaihYe, but you dial 6779
When some internal account want to call account1, they dial 6778.
Above is for an internal call, of course, your PBX server (Fritzbox this case) should able to configure SIP Route with PSTN number to make external calls. For example, if your PBX server bind with a PSTN: +1 222-333-4444, when someone out of the company wants to use their cell phone call your work extension 6778, they just dial +1 222-333-4444, then after the IVR, dial 6778, and the PBX will route the call to account 1.
So, @chris.spiga, in most cases, the SIP User ID, SIP Authenticate ID and SIP Call ID are the same because the admin are lazy and this is easy to maintain, but they are not required to be same, and you don’t need a numeric SIP User ID or SIP Authenticate ID to register the account, but you need log in the Fritzbox to figure out how it configured and how it works. If the Fritzbox does not recognize the 620, you wont able to call it, but if someone calls to you (how does that happen? they call 620?) and you already received 2 calls, you can do attended transfer.
Another problem could be you are using the same account on 5 handsets, what’s your HS mode? if you set it as default HS1, which means the incoming call will always ONLY ring handset 1, no matter you configured it on 5 handsets. it will not ring other handsets, because you set it to do so. You need change the HS Mode to Parallel, or assign different accounts to 5 handsets, and set the account HS Mode to HS1, HS2, HS3, HS4, HS5 accordingly. Please see the pictures in my previous reply.
If you still have problems, please post your Account Settings and Line Settings to me, you can hide the blur the ID, and enable Syslog to Debug level, set Syslog server to 22.214.171.124 (or any valid IP does not reachable), then capture a packets (web -> Maintenance -> Packet Capture), i just want to confirm you set everything correctly.