I have a CIX100 MT056, ISDN BRI, Strata Messaging, which won’t always take the correct VMID to voice mail.

The DID rings MCG#1
This rings Reception 101 Immediate then Voicemail hunt group pilot of 199 Delay 1 and has a VMID of 301

MBox 301 says sorry we are busy and sends them back to MCG#2 (same as MCG#1 except VMID of 302)
Rings reception again then Delay 1 to SM which says “please press 1 to continue holding or leave a message”
Caller can continue to press 1 and go around the 302 MCG loop

If only one call comes in it rings 101, then after Delay 1 it rings SM with VMID of 301

If two or more calls come in the first call rings 101 then goes to SM with 301.
If Reception 101 is already ringing the next call will go straight to SM with no caller ID (as can be seen in SM Utilities / System monitor) and plays the system message “Your call has been answered by a T3 telephony……”

Why doesn’t the second call take the VMID ??
What can I do ??

Thanks
Mark