Xorcom has released channel banks based on Astribank XPP Technology for Asterisk Servers. Using USB 2.0 ports to connect to any Asterisk server, Astribank eliminates the requirement for a PCI (E1/T1) card, and even for PCI slots.
So even a mini servers could easily handle up to 2400 phone calls (provided the processor could handle it, in real life they can't)! How? The standard USB 2.0 interface theoreticaly could reach speed of 480 Mbits per second. A typical uncompressed phone conversation uses about 64,000 bits per second per direction, plus some overhead; in total less than 200Kbits per second per phone call is used. Thus, the theoretical concurrent number of conversations that the USB 2.0 interface can handle is 480 Mbits divided by 200 Kbits: roughly 2,400 calls for a single USB 2.0 port. Even at 50%, it will be 1200 calls.
So what can I get in real life, right now with this XPP technology?
- Very high density – up to 32 analog ports and up to 144 PRI + analog ports on 19" 1U box (144= quad E1 PRI + 24 analog ports)
- High Speed 480 Mbit/s USB2 connectivity
- Full support for fax and modems
- Hot pluggable solution
- Rack- or wall-mountable solution
- Simple integration
- Support for Input Ports
- Support for Output Ports
- Message Waiting Indicator (MWI) for analog phones (great for hospitality installations like hotels, condominiums, assisted living, etc.)