Hi All While calling certain external numbers, the calls get rejected on the voice gateway (ISR 4400 series) with cause code 21. At the same time few calls go through successfully. Below is the call flow. SFB call control ---> SIP voice gateway -----...

I am planning to get a Smartnet contract CON-SNT-C22090EZ for my rack server UCS C220 M3. Will it also cover the TAC support for the softwares like CUCM OS and Unity Connection OS or do I need to go for any additional contracts?