... )Convert any signaling among SS7, ISDN PRI, R2, V5.2, CAS; 3)Rack design with 1U heigt; Signaling converter, signaling gateway, E1 ... links, 16 PRI * Switching Volume: 2048 x 2048 * Clocking accuracystratum 3 Clock. * Clocking Source from E1 or internal. * Hard ware resource ... support any conversion among SS7, ISDN PRI, R2, V5.2,CAS