The Dualcall IP PBX is perfectly suite for a small office providing service for up to 120 Telco lines.
An unlimited number of IP phone (H.323, SIP & IAX) extensions supported.
Dualcall VOIP based telephony IP PBX solutions offer a rich and flexible feature set.
Dualcall IP PBX offers both classical PBX functionality and advanced features
and interoperates with traditional standards-based telephony systems and Voice over IP systems.
Dualcall offers the features one would expect of a large proprietary PBX system such as Voicemail,
Conference Bridging, Call Queuing, and Call Detail Records.
Telephony Services:
Voicemail System
Password Protected
Separate Away and Unavailable Messages
Default or Custom Messages
Multiple Mail Folders
Web Interface for Voicemail Checking
E-mail notification of Voicemail
Voicemail Forwarding
Visual Message Waiting Indicator
Message Waiting Stutter Dial tone
Auto Attendant
Interactive Voice Response
Overhead Paging
Flexible Extension Logic
Multiple Line Extensions
Multi-Layered Access Control
Direct Inward System Access
Directory Listing
Conference Bridging
Unlimited Conference Rooms
Access Control
Call Queuing
ADSI Menu System
Support for Advanced Telephony Features
PBX Driven Visual Menu Systems
Visual Notification of Voicemail
Call Detail Records
Local Call Agents
Remote Call Agents
Protocol Bridging
Provides seamless integration of technologies
Offers a unified set of services to users regardless of connection type
Allows interoperability of VoIP systems
Call Features:
Music on Hold
Music on Transfer
Flexible mp3 based system
Volume Control
Random Play
Linear Play
Call Waiting
Caller ID
Caller ID Blocking
Caller ID on Call Waiting
Call Forward on Busy
Call Forward on No Answer
Call Forward Variable
Call Transfer
Call Parking
Call Retrieval
Remote Call Pickup
Do Not Disturb.
Scalability:
TDMoE
Allows Direct Connection of Asterisk PBX
Offers Zero Latency
Uses Commodity Ethernet Hardware
Voice over IP:
Allows for Integration of Physically Separate Installations
Uses commonly deployed data connections
Allows a unified dial plan across multiple offices
Voice over IP Interoperability:
Dualcall IP PBX provides transparent bridging between Voice over IP protocols and traditional telephony equipment.
In addition, Dualcall IP PBX can transfer calls from one system to another via the IAX protocol.
IAX
H.323
SIP (Session Initiation Protocol)
MGCP (Media Gateway Control Protocol)
Traditional Telephony Interoperability: Robbed Bit Signaling Types FXS and FXO
Loopstart
Groundstart
Kewlstart
E&M
E&M Wink
Feature Group D
PRI Protocols
4ESS
Lucent 5E
DMS100
National ISDN2
EuroISDN
BRI (ISDN4Linux)
Codec Support G.711 ulaw (as used in US)
G.711 alaw (as used in Europe)
G.726
G.729
GSM
