High Density Voice Signaling Converter Chassis - 6U - Requires Power Supply, CPU, Main Control and Interface Cards. Supports R2, ETSI PRI ISDN, V5.2, Qsig and C7/SS7 Signaling Protocols. Supports up to 64 SS7 Signaling Links. Supports ANI and DNIS Digit Manipulation. Supports Black and White access list. Supports External Database Connection. Supports up to 100xE1 (50 SPANS) and/or up to 192xFXS or FXO Analog Ports.