Please try this programming which has proven to solve this issue.  This programming adds mute dialing and delays before and during the dialing of the digits (2 seconds):


***.
**9**
*9*1**200*NUMBER**
**278*
**235*
**4*11*
**2120*  
**2220*


If there is still not fixed, try the next programming:

***.
**9**
*9*1**200*NUMBER**
**27*
**235*
**4*11*
**2120*
**2220*


If time delays of 2 seconds is too long, you can use 1 second:

**2110*
**2210*


Or 1.5 seconds:

**2115*
**2215*


If problem persists, please contact us.