DSP Series 2 to Matrix Controller Series 3 Over Ethernet

Overview

Important! This feature is not supported by the DSP Series 2 Plus card.

The default communications between the DSP Series 2 and the CSP Matrix Series 3 Cards use the mid-plane HDLC bus. Communication over the HDLC bus slows the maximum number of messages that can be transmitted to be less than 100 per second, not allowing the user to achieve high call rates that require DSP services.

Using Ethernet communication for messaging between the DSP Series 2 and CSP Matrix Series 3 Cards allows increased performance by providing more message transactions per second.

This feature supports a new RCOMM state machine on the DSP Series 2 card that monitors the status of the link between this card and CSP Matrix Series 3 Card. Communication over the HDLC bus will continue to be supported. Licensing of this feature is not required.

Configuration

This feature is configured by using the DIP switch S1, position 6 on the DSP series 2 card. By default, HDLC communication is enabled with DSP switch, position 6 set to ON. Ethernet communication is enabled with DIP switch, position 6 set to OFF. Refer to the CSP Hardware Product Descriptions for more details.

When using the Ethernet communication mode, all the I/O ports are connected to the same physical Ethernet switch/hub. Redundancy at the port level is provided by the RCOMM state machine that monitors the status of the link between the DSP Series 2 and Matrix Controller Series 3 I/O ports. The message packets are sent out of the port which indicates a link-up state. Additional logic provides a fall-back to the HDLC option in the event of a failure of all the Ethernet ports. See the figure below.

Figure 7-13 DSP Series 2 to Matrix Controller Series 3 Ethernet Interconnections

Monitoring

The Alarm (0x00B9) message supports the new 0x02 Card Alarm, 0x80 DSP Ethernet Unavailable:

• If at any point the message communication mode is changed from Ethernet to the HDLC bus, an alarm is sent to the host. Refer to the API Reference for more details.

• An Alarm Cleared (0x00C1) message is sent if the communication mode is changed back to the Ethernet mode.