Digital Telephony Card

ASTRA D-401E board featuring 4x voice/data transmission interfaces over E1/T1/J1 links and a hardware echo cancellation unit.

The ASTRA D-401E telephony card is designed to build digital telephony systems based on the Asterisk IP-PBX. The card performs data/voice exchange over E1/T1/J1 links.

The PCI 32/33 MHz bus is used as a host interface. This card provides up to 120 links to transmit voice and data over four E1/T1/J1 interfaces. The E1, T1 or J1 operating mode can be selected individually for each PCI card interface. The ASTRA D-401E telephony card is fully compatible with DAHDI/Zaptel drivers.

The card is notable for its flexible installation options - it can be installed in both 5V and 3.3V slots. This allows to use the board in PCI as well as in PCI-X slots. The PCI master mode is used to relieve the CPU from I/O operations and increase the PCI bandwidth. The product allows for installing the hardware echo cancellation unit - ECM-128-OCT/ECM-064-OCT.