AVer EMC1000, Руководство пользователя, Страница: 9 / 33

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As factory default, new conference is set at VGA quality low bandwidth. Each participant uses
512Kbps bandwidth. For a conference up to 10 VGA participants, it requires 512K x 10 = 5Mbps
bandwidth each way. If all 10 parties are coming from outside of company LAN, your internet needs
to reserve 5Mbps bandwidth during conference. If 5 out of 10 are inside LAN, 5 are outside, then you
need to reserve 2.5Mbps (512K x 5) bandwidth for EMC1000 during conference.
FIREWALL PLANNING
If you install EMC1000 inside company firewall and there are guest participants or remote employees
joining the conference. Likely you need to open the following ports on your firewall.
Port Function Type
5060, 5061, 5063 SIP TCP and UDP
10000 to 11000 RTP media TCP and UDP
80 HTTP Interface (WebTool) TCP
NEAR-END NAT TRAVERSAL
In a deployment scenario where EMC1000 is located behind a firewall and is configured with private
IP address, the signaling sent from the EMC1000 messages will contain private IP addresses. Unless
the firewall provides VoIP NAT Traversal services, sessions will not connect, as the singling
messages will contain non-routable addresses. This issue is called Near-End NAT traversal, as the
problem to be solved is “near” – meaning the close firewall.
EMC1000 solves this problem by providing near-end NAT traversal as part of the EMC1000. The
private IP addresses within the SDP are replaced by the NAT’s public IP address and the clients
receive SIP messages which include SDP with accessible public IP addresses, providing session
completion.
1. Select System Settings, SIP Configuration
2. Click Edit
3. Check Enable Registrar / Proxy checkbox
4. Enter a value for Listening SIP Port
5. Check the MCU is behind NAT checkbox
6. Enter a value for MCU Public IP / Domain Name:
or
7. Press Save to save the configuration
8. After the system restarts, Near-end NAT traversal is applied