During the calls we can’t use PPS service, because DTMF signals sent by SIP were not being received by PPS server
1. Have checked the SIP configuration on the SX side. There r are no parameters which are responsible for DTMF
2. Tried to add RFC2833 support for UMG through the SET RFC2833 on the UMG side. But this comnand didn’t solve problem.
3. Have made upgrade of Viewpoint terminal software to VCGV600R420B13D1105SP01(Release 3.05.1 2005.11.22). Problem have been solved
The reasons of this situation 1) SIP protocol configuration 2) Problem on the UMG
Pay attaention for software version of terminals