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Quasar M - digital E1 card for Asterisk



  • One or two E1 ports
  • PCI or PCIe interface
  • Low profile formfactor (for PCIe)
  • Hardware echo cancellation
  • Bypass switch
  • Embedded TDM switch
  • DMA data transfer
  • Zaptel (dahdi) optimized structure of PCI frames
  • Linux driver (x86, x64)
  • Linux configuration utility
  • Works with any DAHDI-compatible PBX - Asterisk (FreePBX), FreeSwitch, Yate


Quasar-M interface board is intended for connection of E1 interfaces to the servers running Asterisk soft PBX. The adapter is configured as a computer board of PCI or PCI-Express format. Quasar-M supports processing up to 60 voice channels, as well as industry standard telephony signaling, including SS7, PRI (EuroISDN, Q.931/Q.921, AT&T 4ESS, National ISDN 2, Lucent 5E). For CPU offloading, the adapter provides hardware echo cancellation option. The embedded bypass switch can be useable in high reliable voice processing systems. Quasar-M is compatible with all well-known telephony projects – Asterisk, Yate, FreeSWITCH, trixbox, Elastix, FreePBX.

Technical data

E1 attenuation0..-40 db (port 0), 0..-6 db (port 1)
CodingAMI or HDB3
E1 line clockingMaster or slave
E1 multiframeCRC4, CAS
SwitchingEmbedded TDM switch 64x64 slots
Bus interface

PCI 32 bits, 33 Mhz, PCI master capable


PCIe x1

Software support 
  • Configuration utility for Linux
  • Zaptel (dahdi) driver for Asterisk

Order codes

Quasar-ME1 E1 port, PCI
Quasar-MEE2 E1 ports, PCI
Quasar-MEX1 E1 port, PCIe

2 E1 ports, PCIe

Quasar-ME-EC1 E1 port, PCI, echo canceller
Quasar-MEE-EC2 E1 ports, PCI, echo canceller
Quasar-MEX-EC1 E1 port, PCIe, echo canceller
Quasar-MEEX-EC2 E1 ports, PCIe, echo canceller
Quasar-MEE-EC-FO2 E1 ports, PCI, echo canceller, bypass
Quasar-MEEX-EC-FO2 E1 ports, PCIe, echo canceller, bypass



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