ZyXEL Communications LTE Series User Manual page 83

Chapter 8 Network Address Translation (NAT)
Figure 67 Network Setting > NAT > ALG
The following table describes the fields in this screen.
Table 30 Network Setting > NAT > ALG
LABEL DESCRIPTION
SIP ALG Click this (switch turns blue) to make sure SIP (VoIP) works correctly with port-forwarding and
address-mapping rules. Otherwise, click this to turn off (switch turns gray) the SIP ALG.
PPTP ALG Click this to turn on (switch turns blue) the PPTP ALG on the Zyxel Device to detect PPTP traffic
and help build PPTP sessions through the Zyxel Device's NAT.
Cancel Click Cancel to restore your previously saved settings.
Apply Click Apply to save your changes back to the Zyxel Device.
LTE Series User's Guide
83