1)Combined with E1, FXO/FXS access port; 2)4~100 E1, 192 FXO/FXS; 3)Support SS7, PRI, ... all center and other value-added business.Feature:·Signaling support: SS7, DSSI, Q.SIG, R2, V5.2 ... G.168, 128ms Network echo cancellation;Main feature· Support SS7,ISDN PRI,V5.2 Signaling· Flexible route management ... Embedded 4 E1, E1 can be expanded with plug in moudule.· Maxima support 192 FXS ( can be replace by ...