... has the following interfaces: RJ-21 analog voice interface, One T1/E1 port (PP, HDLC or Frame Relay ... CSU/DSU, RJ-48 connector), Two 10/100BASE-T ports, One WIC/VIC slot, External flash memory, AC and ... has the following interfaces: RJ-21 analog voice interface, One T1/E1 port (PP, HDLC or Frame Relay ... CSU/DSU, RJ-48 connector), Two 10/100BASE-T ports, One WIC/VIC slot, External flash memory, AC and ...