AltiGen MAXCS 7.0 Update 1 ACM Administration - Manual (Page 337)

Managing IP Networks
MaxCS 7.5 Administration Manual 321
G.723 – 24 kbps
G.729 – 30 kbps
• It is recommended that you use 20 ms frame size for G.711, G.722, and G.729 when configuring a Codec
Profile.
• When different IP devices using various codecs connect to the server through a Public Pipe, the system
will aggregate the total bandwidth of all connections. If the total bandwidth exceeds that specified in the
Bandwidth for VoIP
box, the system will reject additional connection requests.
Configuration example
Suppose your company has a T1 line configured as half voice PRI and half data service. There are 12 remote
employees using IP phones connecting to the AltiGen system. Because bandwidth is limited, you would like to
regulate the bandwidth used by VoIP. You have set up remote IP phones using G.729 with 20 ms frame, and
you want to limit the number of concurrent VoIP sessions to 6. If you enter 180 in the Bandwidth for VoIP
field, the system will show that 6 G.729 sessions are allowed.
Configuring MAXCS Behind NAT
Your MAXCS system should be inside a firewall/NAT router. If your MAXCS is supporting remote IP phones,
IPTalk or AltiClients, you need to configure MAXCS and the NAT router to make MAXCS work properly behind
NAT. Port forwarding configuration on the firewall/NAT router is required. If you’re not sure how to configure
your firewall/NAT router, please consult your firewall/NAT router manual or vendor. AltiGen Technical Support
will not be able to help with this.
Important: If your firewall/NAT router supports SIP, you need to FULLY disable this feature on the firewall/
NAT router, or conflicts may occur between MAXCS and the firewall/NAT router. In this case, re-
mote IP phones might not work or might behave strangely. Again, please consult the firewall/NAT
manual to find out how to do this.
Take the following steps:
1.
Make sure the MAXCS system uses a private static IP address, for example, 10.10.0.8. Do not use DHCP
on the MAXCS system.
2. Define the range of the local IP addresses (see “Define an Address Range” on page 320). Make sure the
MAXCS system is included in the range. If the range is not defined correctly, all the IP phones will not
work.
Figure 188. The range of local IP addresses
3. Set local IP network ranges to private. Multiple private networks can be added.
4. On the IP Networks tab, in the NAT Support panel, check Enable SIP NAT support.