4 port cti card

Dialogic needs no introduction, so the Dialogic D4 PCI board. Synway and Digium too have D4 PCI equivalent Voice Boards. While both Digium and Dialogic boards uses PCI slots, Synway 4 Port Board uses a USB port like modem.
I have been thinking about comparing these three boards using few common parameters.
1. Ease of Installation
2. [...]

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