6.2 List of Abbreviations

Following abbreviations are used within manual:

• API (Application Programming Interface)
• ASR (Answer Seizure Ratio)
• BIOS (Basic Input-Output System)
• CD (Compact Disc)
• CDR (Call Data Record)
• CLIR (Calling Line Identification Restriction)
• COM (PC serial interface)
• CPU (Central Processor Unit)
• DHCP (Dynamic Host Configuration Protocol)
• DNS (Domain Name Server)
• DTMF (Dual Tone Multifrequency)
• eCPU (enhanced CPU)
• ESME (External Short Messaging Entity)
• FW (Firmware)
• FXS (Foreign eXchange Subscriber) 
• GMT (Greenwich Mean Time)
• GSM (Group Switched Mobile system)
• GPRS (General Packet Radio Service)
• GW (Gateway)
• HW (Hardware)
• IMEI (International Mobile Equipment Identity)
• IMSI (International Mobile Subscriber Identity)
• IP (Internet Protocol)
• IVR (Interactive Voice Response)
• LAN (Local Area Network)
• LED (Light Emitting Diode)
• NAT (Network Address Translation)
• PC (Personal Computer)
• PCB (Printed Circuit Board)
• PCM (Pulse-code modulation)
• PIN (Personal Identification Number)
• POP3 (Post Office Protocol v3)
• PRI (Primary Rate Interface)
• PUK (Personal Unblocking Key)
• SB (SIM Board)
• SC (SIM Client)
• SIM (Subscriber Identity Module)
• SIP (Session Initiation Protocol)
• SMPP (Short Message Peer to Peer) 
  
• SMSC (short message service center)
• SMTP (Simple Mail Transfer Protocol)
• SMS (Short Message Service)
• SSH (Secure Shell)
• SW (Software)
• TCP (Transmission Control Protocol)
• UCMD (UDP commands)
• UDP (User Datagram Protocol)
• UMTS (Universal Mobile Telecommunication System)
• UPS (Uninterruptible Power Supply)
• USSD (Unstructured Supplementary Service Data)
• VoIP (Voice over Internet Protocol)
• WAN (Wide Area Network)