Sell VoIP Gate Way China (Mainland)

Product Name: VoIP Gate WayModel Number: KD821Place of Origin: ChinaN-channel 10Base-T Ethernet port can be connected to the LAN or be connected
to Internet broadband interface. KD821 provides 2-channel 100Base-TX Ethernet
port. KD821 provides 4-channel 10Base-T/100Base-T Ethernet port.
FH8004/2008/2016 provides 1-channel 10Base-T Ethernet port.1/2-/4-/8-/16-channel ordinary telephone port:
Ordinary telephone ports include FXS and FXO. FXS port is connected to the
telephone and facsimile set. FXO port is connected to the user line of PSTN
network. One-channel USB serial port:
This port is connected to the debug terminal or billing terminal. KD821 voice access gateway has the following functions:
1) Flexible networking: suitable for complicated enterprise network environment
2) KD821 can be located behind ADSL modem, and run PPPoE protocol automatically
to start the enterprise Internet interface
3) The connection can be re-dialed automatically after PPPoE disconnection
4) KD821 supports the client protocol that supports DHCP and DNS
5) It runs in the LAN with IP addresses dynamically allocated by DHCP server
6) KD821 can penetrate the enterprise internal firewall and NAT equipment
7) Multiple KD821 can run simultaneously without interference in the LAN of NAT
8) Provision of all-around security mechanism: The service reliability is improved
9) Supports 802.1q and 802.1p: priority of voice/data flow and VLAN label can be
set to improve the service protection ability
10) Guaranty of voice services in the enterprise: when the uplink Internet interface
is disconnected, KD821 equipment can be used for enterprise internal voice
services through the PSTN line
11) Service backup in the call control center: when the system is attacked, KD821
can switch fast; the influence on the service is minimal
12) Simple operation and management: WEB configuration terminal and phone set
configuration method are provided for KD821 equipment
13) Local/remote monitoring and diagnosis: through serial port or Telnet mode,
monitoring and diagnosis of KD821 can be performed locally or remotely
14) Support of patch and auto upgrade function; when software of KD821
equipment is upgraded, use of service is not affected
15) Decrease of charge: if enterprise branch offices have Internet interface like
ADSL and broadband, employees of any two branch offices can call each other
without being charged; the toll call from the enterprise to its branch office is
charged like a local call; therefore, the call charge is greatly decreased
16) Support of T.38 real time fax: several pages can be faxed consecutively with
high definition
17) Support of telephone services like calling number, hooking, call transfer, hotline,
FXO port authority
18) High voice quality: the effect of IP call voice is equivalent to that of PSTN call
19) Supports multiple ITU-T decoding standards like G.711, G.729A, and G.723.1
20) Supports dynamic jitter buffer management, echo cancellation (ITU-T G.168/165),
packet compensation technology, voice activity detection (VAD), and CNG
21) Excellent interworking with enterprise traditional PBX phones: dialing rules are
simple, like a traditional phone
22) Small occupation of Internet bandwidth: all ports of equipment can be used for
conversation at the same time; for example, EIA2016 support 16-channel
conversation at the same time Point-to-plane call:
1) Point to point intra-group call
2) Point to point inter-group call
3) Basic fax (T.38) serviceCalling line presentation:
1) Call forwarding on busy
2) Call forwarding on no reply
3) Unconditional call forwarding
4) Call transfer cancellation
5) Outgoing call restriction
6) Hotline/fly line
7) FXO port incoming/outgoing
8) FXO port whitelist182 intelligent card service:
1) Query of intra-group short number
2) Query of local IP addre