02
DVG-2024S
Technical Specifications
Voice Features
G.711 a/μ-law, G.729A/B, G.723.1, G.726
Codec
Packet Interval (ms) Concurrent Call
G.711 a-law 64K
20 ms, 30 ms, 40 ms 24 ch @ 20 ms
G.711 u-law 64K 20 ms, 30 ms, 40 ms 24 ch @ 20 ms
G.729 8K 20 ms, 30 ms, 40 ms 24 ch @ 20 ms
G.723.1 5.3K/6.3K 30 ms, 60 ms, 90 ms 24 ch @ 30 ms
G.726 32K
20 ms, 30 ms, 40 ms 24 ch @ 20 ms
DTMF Detection and Generation
Silence Suppression & Detection
Comfort Noise Generation (CNG)
Voice Activity Detection (VAD)
Echo Cancellation (G.165/G.168)
Adaptive (Dynamic) Jitter Buffer
Call Progress Generation
Auto or Programmable Gain Control
ITU-T V.152 Voice-band Data over IP Networks
SIP Call Features
Peer to Peer Call
Call Hold / Retrieve
Call Waiting
Call Pick Up
Call Park / Retrieve (SIP Server Required)
Call Forward - unconditional, busy, no answer
Call Transfer - attended, unattended
Do Not Disturb
Speed Dialing
Repeat Dialing
Three-way Calling
MWI (RFC-3842)
Hot Line and Warm Line
Telephony Specifications
In-Band DTMF, Out-of-Band DTMF Relay (RFC2833 or SIP INFO)
DTMF / PULSE Dial Support
Caller ID Generation / Detection:
- DTMF
- FSK-Bellcore Type 1 & 2
- FSK-ETSI Type 1 & 2
- FSK-NTT
- FSK: Calling Name, Number, Date and Time, VMWI
FXS Metering Pulse:
- Polarity Reversal
- 12kHz calling tone
- 16kHz calling tone
T.30 FAX Bypass to G.711, T.38 Real Time FAX Relay
FXS Line test and diagnostics with visual alarm indication
- Inward self test:
- Loopback – codec
- Loopback – analogue
- SLIC DC power voltage
- Tip / Ring DC feed
- Ringer
- Outward Test (GR909 Standard) :
- REN
- Phone Line disconnected
- H.F. DC Voltage (Hazardous and foreign DC Voltage)
- H.F. AC Voltage (Hazardous and foreign AC Voltage)
- Tip / Ring Short
Modem over IP up to V.34
ROH Tone (Receiver Off-Hook Tone @ 480 Hz)
Loop Current Suppression
SIP Account Management
By Port Registration
By Device Registration (share account)
Mixed Mode (Hunt number for inbound, by port number for outbound)
Invite with Challenge
Register by SIP Server IP Address or Domain Name
Support RFC3986 SIP URI Format
SIP Call Management
Support Outbound Proxy
Register up to three SIP servers
SIP Registration Failover Mechanism
Group Hunting
Privacy Mechanism / Private Extensions to SIP
Session Timers (Update / Re-invite)
DNS SRV Support
Call Types: Voice / Modem / FAX
Call Routing by Prefix Number
User Programmable Dial Plan Support
CDR Client
Manual Peer Table (for P2P calls)
E.164 Numbering, ENUM support
IP Network Specifications
Support IPv4, IPv6 future upgradable (Option)
WAN: Static IP, PPPoE, DHCP, PPTP
Network Protocol Support:
IP, TCP, UDP, TFTP, FTP, RTP, RTCP, ARP, RARP, ICMP, NTP, SNTP, SNMP v1/v2,
HTTP, HTTPS, DNS, DNS SRV, Telnet, DHCP Server, DHCP Client, STUN Client, UPnP,
QoS Support:
- WAN: DiffServ, IP Precedence, Priority Queue, Rate Control, 802.1Q (VLAN Tagging),
802.1p (Priority Tag)
DDNS Support
Network Security Specifications
VPN PPTP Client
DIGEST Authentication
MD5 Encryption
DoS Protection
24-Port VoIP Station Gateway
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