I use the Cisco 2811 ITP extensively for my job. We use it for interworking between SS7 TDM links as well as M2PA/M3UA Sigtran links. We use Global title translation, Gateway screening, and Multi-layer routing extensively as well. Is there a certification that specializes in the ITP, or is there a cert that at least includes SS7 TDM/Sigtran? Thanks in advance.