3Com VCX V7111 User Manual page 14

Figure 1 24FXS Gateway Front View
The 8FXS and 8FXO support up to 8 analog telephone loop start FXS or FXO ports, shown
in Figure 2.
Figure 2 8FXS and 8FXO Gateway Front View
The 4FXS and 4FXO support up to 4 analog telephone loop start FXS or FXO ports, shown
in Figure 3.
Figure 3
4FXS and 4FXO Gateway Front View
The 2FXS supports up to 2 analog telephone loop start FXS ports, shown in
14 3Com VCX V7111 VoIP SIP Gateway User Manual
Figure 4.