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Low Speed Protection Card
Overview
Overview
Low speed protection provides backup circuitry for any T1 service port on a Quad T1 service card or Quad DS1 ADPCM service card in the Axxius chassis. The Relay card provides the physical connectivity between the “Protected” T1 service port and the “Backup” T1 service port. Connectivity exists between the Service card and the Relay card via the backplane pins only.
The service card slot that is configured for the “Backup card” is specified using CLI commands. Additionally, the commands enable the user to specify what service card (T1 or DS1 ADPCM) is to be protected and which port(s) on that card are to be protected. In this manner, the protection card provides protection on an individual port basis as opposed to a per card basis. Therefore protection is available for multiple cards at the same time, as long as the port needing protection is not already being used by the Backup card. For example if a Quad T1 card, slot 1, port 1 requires protection, the Backup card port 1 is used to provide that protection. Ports
A protected system can contain both T1 and DS1 ADPCM service cards. However, the ADPCM mapping must be set the same on all cards in the protected system for Port #1 to be protected. Note: ports
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| BACKUP CARD | |
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| T1 Service | DS1 ADPCM Card | DS1 ADPCM Card |
PROTECTED CARD | Card | (ADPCM set to | (ADPCM set to "map1", |
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| "none") | "map2" or "map3") |
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T1 Service Card | supported | supported | not supported |
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DS1 ADPCM Card | supported | supported | not supported |
(ADPCM set to "none") |
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DS1 ADPCM Card | not supported | not supported | supported |
(ADPCM set to "map1", |
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"map2" or "map3") |
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Axxius 800 - Release 2.2 |