AltiGen MAXCS 7.0 Update 1 ACM Administration - Manual (Page 437)

MaxCS 7.5 Administration Manual 421
A P P E N D I X
E
Troubleshooting
This section describes some common problems you may encounter, and provides steps you can take to try to
resolve them.
Polycom Phone Cannot Register
If a Polycom IP phone cannot registrer, try the following:
1.
Check LAN connectivity
2. Check that firewalls have port s80 and 443 unblocked
3. Reset the Polycom phone to the manufacturer’s default and then reboot it. For instructions, see the
MAXCS 7.5 Polycom Configuration Guide
.
Poor Voice Quality
When voice quality is poor, try the following:
1.
Perform a Loop-Back Test . Call yourself by dialing out and dialing back into yourself. If you don’t have
any problems performing this test, the problem is most likely in the network or at the remote site.
2. Check Traffic Between MAXCS IP Stations . Open the Current Resource Statistics window (on the View
menu) and the IP Cumulative Traffic Statistics window (on the Report menu) in MaxAdmin to view network
traffic.
3. Check the RTP and RTCP Settings . RTP/RTCP stands for Real-Time Transport (Control) Protocol, a
transport protocol for real-time applications used to transport packetized voice packets over the IP
network. Make sure UDP port numbers (49152 + n*512) ~ (49152 + n*512+p*2), where “n” is the gateway
ID and “p” is the number of IP resource channels, are not assigned to other applications.
Note: You can find this range displayed in the Current Resource Statistics window in the Local Ports
column.
4. Check Network Configurations . Follow all network configuration guidelines provided under “Network
Configuration Guidelines for VoIP” on page 299. Make sure the router, WAN bandwidth, and Jitter Buffer
are configured properly.
Cannot Make a Connection
If a connection cannot be made, check the following: