Системни изисквания и спецификация

A - включват се два аналогови телефона с тонално набиране; B - RJ45 връзка към 10/100 Base-T Eheternet към HUB/Switch ; C - Захранваш адаптор на напрежение (включен в комплекта).

Voice-over-IP (VoIP) protocols

• H.323 v2
  
  
• H.323 v4
  
  
• SIP (RFC 2543 bis)
  
  
• MGCP 1.0 (RFC 2705)
  
  
• MGCP 1.0/network-based call signaling (NCS) 1.0 Profile
  
  
• MGCP 0.1
  
  
• SCCP
  
  

Voice codecs

• G.729, G.729A, G.729AB2
  
  
• G.723.1
  
  
• G.711a-law
  
  
• G.711µ-law
  
  

Provisioning and configuration

• DHCP (RFC 2131)
  
  
• Web configuration via built-in Web server
  
  
• Touch-tone telephone keypad configuration with voice prompt
  
  
• Basic boot provisioning (RFC 1350 TFTP Profiling)
  
  
• Dial plan provisioning
  
  
• Cisco Discovery Protocol for SCCP
  
  

Security

• H.235 for H.323
  
  
• RC4 encryption for TFTP configuration profiles
  
  

Dual-tone multi-frequency (DTMF)

• DTMF tone detection and generation
  
  

Out-of-band DTMF

• H.245 out-of-band DTMF for H.323
  
  
• RFC 2833 AVT tones for SIP, MGCP, SCCP
  
  

Call progress tones

• Configurable for two sets of frequencies and single set of on/off cadence
  
  

Line-echo cancellation

• Echo canceller for each port
  
  
• 8 ms echo length
  
  
• Nonlinear echo suppression (ERL greater than 28 dB for f = 300 to 3400 Hz)
  
  
• Convergence time = 250 ms
  
  
• ERLE = 10 to 20 dB
  
  
• Double-talk detection
  
  

Voice features

• Voice activity detection (VAD)
  
  
• Comfort noise generation (CNG)
  
  
• Dynamic jitter buffer (adaptive)
  
  

Fax

• G.711 fax pass-through
  
  
• G.711 fax mode