Kod:
CCVP - ( Cisco Certified Voice Professional )
CIPT (Cisco IP Telephony) 642-444
CIPTOS - (Cisco IP Telephony Operations Specialist)
CIPTDS - (Cisco IP Telephony Design Specialist)Ayrıca QoS (Quality of Service) ile ilgilenmenizi özellikle tavsiye edebilirim.
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