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A modem pool (modem server) is selected with a total modem capacity that meets the peak connection load generated by all modem applications combined.
The modem pool (modem server) is installed at a location convenient for the telephone lines the modems require.
The modem pool is connected the TCP/IP network at a location that is accessible to all modem applications.
The DialOut/EZ Redirector is installed on each application computer. For the modems needed by applications on that computer, DialOut/EZ virtual COM ports are created and configured with the IP address and TCP port number of the modem pool.
Advantages
 The total number of modems (and their telephone lines) in the modem pool often can be up to 90% fewer than the prior total of dedicated modems.
Multiple modem servers can be used with DialOut/EZ failover features for improved modem pool reliability.
Modern modem pools can improve network security by preventing dial-in and restricting dial-out modem access by requiring login.
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Key Design Considerations
Does your application need to control DTR, sense DCD/DSR/RI, or control other modem settings such as baud rate?
If so, you need to select a modem pool that supports the COM Port Control protocol (RFC 2217), which the DialOut/EZ Redirector uses if available. Note that Class 2/2.0 faxing from desktop fax applications definitely requires COM port control. details
Will you need a modem pool for T1/E1 lines?
For modem pools over 8 modems, T1/E1 telephone lines become the likely choice and your modem pool choices change significantly.
Should you build your own modem pool?
For enhanced security features or to re-use equipment you may already have, you can create a PC-based modem pool with Tactical's TacServe COM Port Server software and modem boards. The TacServe software can also be used as a front-end to add security features to an off-the-shelf dedicated modem pool.
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