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Number of
Telephony
Ports
Max Number of
Simultaneous Calls
Telephony
interfaces
Gateway
or
Router
1 or 4 15 to 120
software upgradeable
T1/E1/PRI Router
up to 16 120 T1/E1/PRI
FXS, BRI
Gateway/Router
From 1 to 32 ports for analog
FXS or FXO IP connectivity
The most comprehensive
BRI VoIP
solutions on
the planet
High-capacity trunk solutions
Do-anything
VoIP boxes
1
1 or 2
2 to 8
1 or 2
2 to 8
2 to 8
2
up to 32
1
2
3 / 5
3 / 5
4 to 16
2
2
8
4
8
8
2
up to 32
2
2 / 4
4 / 8
4 / 8
32
FXS
FXS
FXS and FXO
FXS
FXS and FXO
FXS and FXO
FXS
FXS
BRI So
BRI So
BRI So
BRI So
BRI So
Gateway
Router
Gateway
Router
Router
Router
Wireless Router
Router
Gateway
Router
Router
Router
Router