Carrier Access Axxius 800 user manual T1 Service DS1 Adpcm Card, Adpcm set to none DS1 Adpcm Card

Models: Axxius 800

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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 2-4 are still available for protection on the remaining protected service cards.

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 2-4 are not effected by the ADPCM feature configuration. See the following chart:

 

 

BACKUP CARD

 

 

 

 

 

T1 Service

DS1 ADPCM Card

DS1 ADPCM Card

PROTECTED CARD

Card

(ADPCM set to

(ADPCM set to "map1",

 

 

"none")

"map2" or "map3")

 

 

 

 

T1 Service Card

supported

supported

not supported

 

 

 

 

DS1 ADPCM Card

supported

supported

not supported

(ADPCM set to "none")

 

 

 

 

 

 

 

DS1 ADPCM Card

not supported

not supported

supported

(ADPCM set to "map1",

 

 

 

"map2" or "map3")

 

 

 

 

 

 

 

 

 

 

 

 

 

17-2

Axxius 800 - Release 2.2

Page 482
Image 482
Carrier Access Axxius 800 T1 Service DS1 Adpcm Card, Adpcm set to none DS1 Adpcm Card, Adpcm set to map1 Map2 or map3