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Dialogic DISI32 Station Interface Board
Field proven, analog station interface board with media resources

Dialogic DISI32 Station Interface Board

Dialogic Products
JCT Media Boards
Dialogic DISI32W 32-port Analog Station Interface Board, PCI
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The Dialogic DISI32 Switching Board is a next-generation building block for converged communications systems. This board is a single-slot PCI solution that connects analog telephone devices directly to converged communications platforms to create affordable, small- to mid-size, server-based Private Branch Exchanges (PBXs), telemarketing systems, and call centers. This product is highly reliable and cost effective, offering an optimized mix of analog station interfaces and resources on which to build highly scalable systems.

DISI32 is a full-size, single-slot PCI board, which is based on DM3 architecture. It provides connectivity for up to 32 station interfaces and includes conferencing, voice play/record, tone detection and generation, and Caller ID capabilities. DM3 architecture allows access to independent, high-performance, firmware-based network protocol and media processing resources that can be operated and integrated on compatible hardware platforms.

Features and Benefits:

Features Benefits
Single-slot PCI solution Can connect up to 32 analog telephone devices directly to converged communications platforms
Conferencing resources Supports up to 16 conferees in flexible configurations of 2 to 16 parties per conference
Enhanced conferencing features Includes coach-pupil mode, volume controls, and active-talker identification
Frequency Shift Keying (FSK) station signaling Enables Caller ID delivery and message-waiting-indicator control
Off-hook FSK signaling Allows messaging implementations to Caller ID Type 2 devices, such as Caller ID or Call Waiting
Available with Universal PCI edge connector Universal PCI form factor compatible with 3.3 V and 5.0 V bus signals enabling deployment in a wide variety of PCI chassis from popular manufacturers.


Technical Specifications
Maximum boards per system 8
Analog station interfaces 32
Fixed voice resources 32
Sharable conference resources 16
CLASS signaling Frequency Shift Keying (FSK)
CT Bus loads per board 1
Maximum CT Bus loads per system 20
Resource sharing bus CT Bus/H.100
Control microprocessor ARM7 TDMI
Digital signal processor Freescale DSP56303 @ 100 MHz, with 128Kx24 private
Supported operating systems Windows; Linux
Host Interface
Bus compatibility Complies with PCI-SIG Bus Specification, Rev. 2.2
Bus speed 33 MHz
Bus mode 32- to 16-bit conversion in target mode
Shared memory 128 KB page
Interrupt level 1 IRQ
I/O ports None
Form factor PCI long card
12.3 in. (31.24 cm) long (without edge retainer) or 13.3 in. (33.78 cm) long (with edge retainer)
0.79 in. (2 cm) wide (total envelope)
3.87 in. (9.83 cm) high (excluding edge connector)
Power Requirements
+5 VDC 3.5 A max
+12 VDC 5 mA max.
-12 VDC 20 mA max
Environmental Requirements
Operating temperature +32ºF (0ºC) to +104ºF (+40ºC)
Storage temperature –4ºF (–20ºC) to +158ºF (+70ºC)
Humidity 8% to 80% non-condensing
Cooling Conditions for Maximum Operating Temperatures
+122ºF (+50°C) 1.8 CFM per board
+104ºF (+40°C) 1.2 CFM per board
+86ºF (+30°C) .9 CFM per board
Station Interface
Signaling type Loop start originate
Loop current range 25 ± 5 mA
Open loop voltage 20.5 ± 1 VDC
External power supply 1 required per board
Ring frequency 20 Hz
Ring amplitude 40 Vrms @ 20 Hz minimum into 4 REN
2-wire return loss 25 dB
Connectors 68-pin SCSI to RJ-11 breakout box
Maximum loop length 3500 ft (1050 m) using 24 AWG
Audio Input Interface
Input impedance 1000 Ohms, AC coupled
Maximum input level 600 mVpp
Connector 1/8-in. (.31 cm) mini-phone jack
Conference resources 16
Conference size 2 to 16 conferees
Number of conferences Up to 5
  • Automatic gain control
  • Dynamic create/destroy
  • Dynamic add/delete
  • Echo cancellation
  • Coach/pupil mode
  • DTMF volume control
  • Tone clamping
  • Active talker notification


Download the Dialogic DISI32 Station Interface Boards Datasheet (.PDF)


Dialogic Products
JCT Media Boards
Dialogic DISI32W 32-port Analog Station Interface Board, PCI
Get a Quote!