D-Link DSL-X1852E User Manual page 73

Section 4 - Configuration
Enable H.323
H.323 standard provides VoIP telephony and video conferencing.
ALG:
Enable ALG for H.323 if such applications will be used in your network.
Enable RTSP
Allows applications that use Real Time Streaming Protocol (RTSP) to
ALG:
receive streaming media from the Internet.
Enable SIP ALG:
Allows devices and applications using VoIP (Voice over IP) to
communicate across NAT. Some VoIP applications and devices have
the ability to discover NAT devices and work around them. This ALG
may interfere with the operation of such devices. If you are having
trouble making VoIP calls, try turning this ALG off. This is disabled
by default.
Enable FTP ALG:
Allows devices running FTP (File Transfer Protocol) to provide such
service successfully through the NAT router.
Enable PPTP
Allows machines on the LAN to connect to their corporate network
ALG:
using the PPTP protocol.
Click Save when you are done.
D-Link DSL-X1852E User Manual 67