You are here: CSP Developer’s Guide: Line Cards > 1 DS3 Information > Configuring DS3
The DS3 card can be used with any other line card or combination of cards to yield a maximum platform capacity of 80 spans. If you wish to configure 64 spans or more in a single node, please contact Excel Technical Support.
To configure the DS3 card, you must have the host send the API messages outlined in the steps below in the order listed.
The DS3 framer is in service when the DS3 card is inserted so you do not have to bring it into service with the Service State Configure message (0x000A) specifying the DS3 offset AIB (0x32) - unless it was brought out of service by the host.
1. Assign Logical Span ID (0x00A8).
2. Inpulsing Parameters Configure (0x0028).
3. Inseize Instruction List Configure (0x0029).
4. Service State Configure (0x000A) bring spans into service.
5. Service State Configure (0x000A) bring channels into service.
Important! The DS3 framer must be in service before spans and channels can come into service. You can perform other types of configurations after Step 2. This is only a sample configuration, and others can be more complex.