Conversion of TDM communication to VoIP TDM

Gateways convert conventional analog (line and extension) and digital E1 PRI communication to IP-based networks, therefore allowing these two technologies to work in an integrated configuration.


SIP Full support
This system fully complies with the latest version of the SIP standard (RFC3261). This ensures interoperability with a wide range of third-party devices including IP phones, video phones and service provider (Telco) switches. Therefore the user is not tied to a specific brand or country for acquiring these devices.

Geographically Distributed System Implementation
This system is designed based on the IMS structure. This structure allows geographically distributed implementation of the system. For example it is possible to design a structure where connections to the public telecom network, call flow management, and connections to the private network are physically situated in geographically dispersed locations. This is also useful for implementation of more effective redundancy solutions.

Flexible Device Management
Administrators may use web, telnet, or console interfaces for connecting to the system which allows management from remote locations.

Customizations for tailor-made solutions
One of the main benefits of AVA products is the availability of the engineering team to clients, and the possibility to design and implement customer-specific features and capabilities into the systems. AVA provides these customization services with minimum costs (or free of charge in some cases).


Technical Features and Specifications


Web-based Administration Interface
   Unlimited Number of Administrators
   Detailed Permission Settings for each Admin
   Detail Activity Log for Each Admin
Web-based User Interface

Unified Messaging System
  Adjustable Quota per Extension
  Message Notification (By email)
  Message Forwarding (By email as attachment)
  MWI (Message Waiting Indication)
  Stutter MWI
  Remote User Access (By phone / web)

Virtual Fax (Send / Receive)
  Adjustable Quota per Extension
  T30 Fax
  Fax Notification (By email)
  Fax Forwarding (By email as attachment)
  Remote User Access (by web)
  Automatic Voice / Fax Detection on Voice Mail
Text Messaging (SMS)

CTI Applications

Softphone Support (Any SIP soft phone)

Operator Extension / Line Activity Monitoring Panel
Line State (Off-hook / On-hook) Monitoring by Phone
Web-based Line Status Monitoring
Web-based Trunk Status Monitoring
Web-based Extension Status Monitoring

Virtual Fax
The system provides fax services to all subscribers. In effect, this system can provide fax-boxes to all subscribers. Each subscriber may view/manage their fax box through email notifications or the system's web interface. Faxes are received and stored as PDF files which may be printed out or archived for future reference.

Virtual PBX
In order to provide independent service to special departments in the organization, it is possible to define "virtual PBXs" in the system, by which dedicated channels for connecting to the public telecom network are assigned to the designated department, and system behavior is customized for incoming/outgoing calls on those channels.

Call Recording
This is an optional feature which allows recording of selected calls, a feature frequently used in call centers and customer service departments. Transparency and scalability is achieved through storage on encrypted external media. This feature also offers two levels of recording quality. The low quality option let's you save more space on storage while the high quality option brings more clarity and stereo recording for separation of voice on each call leg.

Other PBX Features
Voice Activity Detection (Answer / Disconnect Supervision)
VAD Threshold Adjustable
Line Gain Adjustment
FAX Relay
DTMF (In-band / Out-of-band)
Jitter Buffer – Adaptive
Echo Cancellation – (G.168)
5 Levels ODA (Outside Dialing Access)
ODA Access Lists
ODA Call Timer
IP Trunk
Call Detail Records (CDR)
Door Phone and Elevator Phone


Data Storage Formats
Voice (Voicemail & Recording): MP3 and Wave

            Avg. size per minute: 700KB

Call Detail Records: ASCII - CSV exportable

            Avg. size per call: 80 bytes

Encryption for user file system supported

Voice and CDR data downloadable by admin through web interface

Backup and restoration of all data by admin through file system duplication or web-based interface


PGW2000 Specification




Processing capacity (Instructions per second)

Up to 8 BIPS



External storage support

Up to 2xUSB external storages

Number of subscribers

Up to 500 subscribers

Maximum number of concurrent call sessions

Up to 500 calls

System redundancy support



Between 0.6 to 1 depend of capacity on demand (Erlang of 1, using G.711 codec)



Maximum number of concurrent call sessions

208 calls (Between 0.6 to 1 depend of capacity on demand (Erlang of 1, using G.711 codec))

Modular design


Number of analog ports

13 place (max 208 combination ports of 4ports modules FXO or FXS or 4port cards the max number of 52 E1 port)

I/O interfaces

11xRJ45 Console, 2x10/100 RJ45 Network port

Maximum power requirements

50 Watts

Power Input

110/220VAC or -48VDC

Physical dimensions

440 x 250 x 170mm
3.5U Rack-mount 


Chassis: 3Kg
Full module: 6.3Kg



Voice Codecs

G.711 U-Law and A-Law, G.723.1 and G.723.1, G.729, G.726, GSM

Call Signaling

SS7 (ITU-T Q.700 series), 24bits/14bits PC, ISUP/TUP
ISDN-PRI(ITU-T Q.931,Q.921)
V5.2(ITU-T G.964,G.965)
CAS R2Q.400-Q.490
CAS DTMF(BellCore TR-TSV-002275, Subsection 6.13)


RFC3326(Reason header in SIP messages)
RFC2327 (sdp)
RFC3398 (ISUP-SIP Mapping)
RFC5806 (Diversion Indication in SIP)
RFC2833 (DTMF )
RFC3362 (t.38)
RFC 3261(SIP 2.0)
RFC3204 (MIME media types for ISUP and QSIG Objects)
RFC3578 (Mapping of ISUP overlap to SIP)



Ordering information:


TDM Device chassis and modules

Part number



Chassis with one power supply support and RJ ports for subscribers


Chassis with two power supplies support and RJ ports for subscribers


Chassis with one power supply support and DB ports for subscribers


Chassis with two power supplies support and DB ports for subscribers

PGW2000-PS-DC 48V DC Power supply module
PGW2000-PS-AC 220V AC Power supply module
PGW2000-LAN-6FE 6 ports Fast Ethernet LAN Switch 10/100
PGW2000-DSP-120-4E 120 DSP Channel Module with 4xE1
PGW2000-USER Empty user daughter board with 4 modules support (Total 16 subscribers)

4 Line FXS Module

PGW2000-4FXO 4 Line FXO Module