Criticom Contact Information www.criticom.coom About our Company Criticom presents the DISA approved ISEC-323(N), the secure switching solution for VTC over IP. ISEC-323(N) is the DISA approved solution for transition from DVSG to the new DVS 2. Using standard off-the-shelf codec's, Type-1 encryption, and its own ISEC optical switch, Criticom offers the only automated TEMPEST/JITC & DISA certified solution for IP and ISDN networks.