Has anybody had an issue with 2 systems connected via QSIG.

7200 on v4.40

Cab 1
MCP 16DLI 16DLI
Tepri SVMi-20 Combi

Cab2
LCP 16DLI 16DLI
Tepri

Tepris running 4.19 & 4.21

With the Samsung connected to the 2nd system the ISDN30 fails after a day or 2, but with them not connected the lines are fine.

This issue is doing my nut in