OpenVox AE810P User Manual page 9

Sample application
When you need 4 PSTN lines and 4 extension sets, for example, one
FXO-400 module and one FXS-400 module should be installed. PSTN
lines correspond to FXO modules which are red while extension lines
correspond to FXS modules which are green.
Analog
phones
Key benefits
 Takes full advantage of Octasic hardware echo cancellation module to
deliver the superior voice quality on both FXO and FXS interfaces in
all 8 ports
 Adjustable interrupt routing design
 Interrupts frequency adjustment
 Up to 8 simultaneous PSTN calls (per PCI-E slot)
OpenVox Communication Co. LTD.
A810P/AE810P on DAHDI User Manual
FXS-400 module
Figure 2 Sample application
FXO-400 module
Power supply
connector
PCI
URL: www.openvox.cn
8