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Common configurations
Before you start to install SCS, you must understand your network and the information required with respect to network services.
Ensure you obtain and understand the answers to the following questions:
• Do you have an existing DNS server?
• If yes, can you configure SRV records on the existing DNS server?
• Do you have an existing NTP server?
• Do you have an existing DHCP server?
• If yes, can you set up DHCP Option 66 for TFTP to point at SCS?
Within your network, DNS, NTP, and DHCP servers can exist. If these servers are not present, SCS can fill any of these rolls if setup
during installation to do so.
The following table shows reference configurations for each possible setup. In the DNS, NTP, and DHCP columns, Yes means the
service will be provided by SCS.
The following notes describe each customer configuration.
Configuration A (DNS=Y, NTP=Y, DHCP=Y)
• Plug and Play setup.
Note: For Plug and Play configuration, you only enter the MAC address of the phone and configure a user.
• Phones will configure themselves using SCS.
Configuration B (DNS=Y, NTP=Y, DHCP=N)
• SCS handles name resolution and SRV queries. Phones and soft client PCs should use SCS as DNS server.
• Requires DHCP server or static IP address configuration.
• If DHCP does not have Option 66 configured to point to the SCS, then you must manually configure the TFTP server address on the
telephone for provisioning.
Configuration C (DNS=N, NTP=Y, DHCP=N)
• DNS server should have SRV records configured to point at the SCS server. If SRV records cannot be configured, use the Fully
Qualified Domain Name (FQDN) for the SIP domain during system installation.
• Requires DHCP server or static IP address configuration.
• If DHCP does not have Option 66 configured to point to the SCS, then you must manually configure the TFTP server address on the
telephone for provisioning.
2007 Nortel
Configuration DNS NTP DHCP
A
Yes
B
Yes
C
No
D
No
E
No
F
Yes
G
No
Software Communication System v1.0
Yes
Yes
Yes
No
Yes
No
Yes
Yes
No
No
No
No
No
Yes
Screen
Common configurations
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