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|
| 1. Cost Saving Features |
 |
VoIP
Interface ( VoIP VPN )
Intergrate PSTN and Internet Telephony into PBX system. All
office can be controled as a VPN network via Internet through
VoIP Interface. Users can make a cost effective call over
VoIP |
|
Auto
Attendant (DISA)
One board design of Non-blocking and no time different extension
transfer features can answer all of CO lines at the same time. |
|
Intelligent
Voice Mail
DK Series builds in the precise Voice Mail features in the systems.
You just need to add one optional board on it. It do help you
to save much cost comparison with external device one. |
|
SMDR
This function helps you to analyze and control costs by recording
and printing outgoing detail messages. |
|
Toll Restriction
Enables you to block local, long distance, and/or international
calls in order to minimize expenses. |
| 2. Safety Capability |
|
Caller
ID
Identifies the phone number of each incoming call, and can
be transferred to designated stations. The system also provides
a Caller ID Call Back capability for answered or unanswered
calls. |
|
Call Screen
Filters out unwanted calls from designated phone numbers. This
function can be set at Day / Night time separately. |
| 3. High Efficiency Functions |
|
Auto
Fax Switch
Automatically distinguishes between incoming faxes and voice
calls. |
|
Baby Phone
This key set with extra phone jack enables you to directly connect
any analog line device, such as PC / Notebook with modem for
Internet, FAX, Wireless Phone, or Single Line Phone. |
|
Remote Programming
Monitor and configure your customers' systems from your own
facility to provide prompt and reliable service. |
|
Broker's
Call
Specially designed for brokering by allowing you to individually
and privately communicate between two parties. |
|
Speed Dialing
Pre-program most of using telephone number for quicker convenient
dialing. |
|
Line Queuing
With this function, the system will automatically inform and
reserve next available C.O line for you. |
|
One Touch
Dialing
Designate individual keys (Programmable DSS Key) to automatically
dial frequently used numbers. |
|
Programmable
Feature Keys
Rearrange the functional programming key of the DK Series to
suit your own needs. |
| 4. VoIP Protocol and Features |
|
SIP call signaling - RFC 3261 with
backward compatible with RFC 2543 |
|
RTP ( RFC 1889 ) , RTCP ( RFC 1890
) |
|
SDP ( RFC2327 ) |
|
NAPTR for SIP URI lookup ( RFC
2915 ) |
|
DHCP |
|
PPPoE |
|
TFTP/HTTP for Auto Provisioning |
|
IEEE 802.1Q VLAN |
|
SNTP for network time synchnization |
|
Media Encription -- AES, HMAC,
MD5, HMAC SHAI |
|
Line Echo Cancellation |
|
VAD ( Voice Activity Detection
) |
|
CNG ( Comfort Noise Generation
) |
|
Packet Lost Concealment |
|
Codec Support G.729A/B, G.723.1/A,
G.726, G.711 ( a-law and u-law ) |
