Welltech SIPPBX 6200 V.3.1.1 - Manual (Page 16)

Welltech Technology Co., Ltd.
SIPPBX 6200S, 6200GS, 6200N Release 3.1.1
User Guide
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• Polling interval (second): How long will the SNTP synchronize the time from
the SNTP server in seconds.
• Min Retry Interval (second): This is the initial retry interval. Each retry will
multiple 2. For example, the Min Retry Interval is 10 and Max Retry Interval is
600. The retry sequence will be 10, 20, 40, 80, 160, 320 seconds.
• Max Retry Interval (second): This is the maximum time to wait before
attempting a retry.
• Max Adjust Time (second): If this is zero, the SNTP client will be willing to
apply any size time adjustment. If this is non-zero, then any time adjustment
greater than this will be considered an error.
• NTP Server Port: This is the port number the SNTP client will attempt to
connect to on the time server. The default value is 123.
• Local NTP Port: This is the port number that will use to listen for replies from
the server. The default value of 0 means to use a random port number.
• Packet Error Check: If this is disabled, then the validity checks are
suppressed. The default value is enabled.
Step 5: Choose to enable the voice gateway mode or not. This feature allows
LAN port connect to local private IP address for SIP extension devices and they
should register to WAN port IP address. However, WAN port IP should be
configured as internet static IP address. Then, SIPPBX 6200x is able to support
NAT traversal to route calls between WAN and LAN port.
Figure 3.1-5
Parameter Description:
• Voice Gateway: When you enable voice gateway feature, SIPPBX 6200x will
be able to play the role as a NAT server to pass through SIP and voice call
between WAN and LAN ports . Please refer to Voice Gateway Example for a
configuration example.
Note: Enable Voice Gateway will require 2 Ethernet ports connected, one is for
WAN and another is for LAN (private network). It can play as a SIP-aware
voice NAT router. SIP IP devices can either connect to LAN interface or
WAN interface. Voice NAT transversal will be done automatically in between
WAN and LAN ports.
Step 6: Setup the corresponding network parameters.
Note 1 : If you have configured SIPPBX 6200X to
Voice Gateway Mode (Voice
call between WAN and LAN ports) at Step 5, you will see the webpage
configuration appear LAN Interface configuration as follows.