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Please specify your question about E1/T1 PRI APS SHELF The E1/T1 PRI APS Shelf consists of a card cage and a backplane which houses APS Cards that work with the 8-port CE cards. The shelf, together with the I/F CARD PRI APS (90-6345-02) and CONTROL CARD PRI APS (90-6346-01) provide N:1 Aut *