DialOut/EZ® COM Port Redirector

On the client computer running DialOut/EZ
You add virtual COM ports using the DialOut/EZ Control Panel and configure them to use your modem server.
Your application uses DialOut/EZ virtual COM ports instead of local physical COM ports. If your application uses Windows modem devices, you can create them on DialOut/EZ virtual COM ports.
Your application opens, reads and writes virtual COM ports using the standard COM port API.
The DialOut/EZ Redirector automatically makes TCP/IP connections to the modem server and relays the virtual COM port data stream and control actions.
On the modem server
The server receives a TCP/IP connection from the DialOut/EZ redirector when a virtual COM port is opened.
The server automatically allocates an available modem for each DialOut/EZ connection.
The server converts the data stream and control signals and relays them to the modem.

The modem initiates a modem call on the PSTN. For servers with more than 8 modems, digital modems and PRI (T1/E1) lines are commonly used.


The DialOut/EZ Redirector — Version 4.9.2

Extensive Platform Support


Windows 7/2008/Vista/2003/XP/2000/NT4/9x
Terminal Services, Citrix Metaframe
Native and virtual platforms, including Virtual Server and VMware
32-bit or 64-bit version automatically installs

Scalable, Fast, Flexible


Up to 4,096 virtual COM ports for large applications
Automatic failover to backup modem servers
Entire data path is at kernel level, including networking and SSL
Low latency, no mode/context switch overhead of a Windows service
  Always available, user login not required
Both outbound and inbound connections

Works with Your Choice of
TCP/IP Modem Server


Supports COM Port Control Protocol (RFC 2217), Telnet, raw TCP
Uses only widely supported public TCP/IP protocols
Configurable to detect/respond to any server login prompt

Easy to Configure


Verifies access to server and supported TCP/IP protocols
Prompts for modem drivers for new virtual COM ports
Checks modem access with AT commands
  Recommends/sets optimal redirector settings
Can replicate settings across any/all virtual COM ports
Manages IP routing table to maintain server access

Transparent to Applications


Extends server connection for COM port hand-off
Automatically restores interrupted network connections
Synchronizes COM port open with server ready condition
Optionally throttles data rate to COM port settings



Automatically logs in to servers, using multiple credential sources
Supports SSL/TLS connections using OpenSSL (32-bit versions only)
Settings and trace logs can be restricted to Administrators



Installs interactively or via command line
Automatic failover to backup site license manager
Supports unattended command line install with privilege elevation
Uses DNS to resolve hostnames of servers
Configuration snapshot utility helps replicate settings during install
User-defined presets allow quick/controlled reconfiguration