4 ISDN2/BRI Module
Expansion module with 4 ISDN2/BRI ports. Module is supported in ZYCOO IP PBX U80 and U100.
Expansion module with 4 ISDN2/BRI ports. Module is supported in ZYCOO IP PBX U80 and U100.
Expansion module with 1 ISDN/PRI port. Module is supported in ZYCOO IP PBX U50, U80 and U100.
Expansion module with 4 FXO ports for 4 FXO trunks. Module is supported in ZYCOO IP PBX U50, U60, U80 and U100.