The Openvox PRI Card DE210P offers 2 ports of PRI (E1 or T1) interface to SIP server. With this card you can accomodate maximum 60 simultaneous calls. This card has broad interoperability with various telephony systems including asterisk, freepbx, yate etc. Echo cancellation module providers carrier grade call quality even at higher volume.
The 1A4B03F belong to Digium family of A4 Series. This card can be installed in server PCI-Express slot. This card has built in Echo Cancellation
Digium 4 Port E1/T1 digital asterisk card 1TE435BF supports up to 120 concurrent calls ideal for large call center. This card works out of the box with any asterisk version.
This Asterisk card is a four FXO ports, plug and play PCI/PCIe card. By Usin 410P analog card, open source Asterisk PBX and stand alone PC, users can create their SOHO telephony solution include all the sophisticated features of traditional PBX, and extend features such as fax in IP PBX.It supports standard dahdi / zaptel drivers , can work with Asterisk / trixbox / elastix