CISCO - L1010/8510 4PORT T1 CIRCUIT EMULATIONS SERVICES (CES) PORT ADAPTER MODULE W/RJ-48 CONNECTORS SPECIFICATION - PRODUCT DESCRIPTION : CISCO EXPANSION MODULE - 4 PORTS - DEVICE TYPE : EXPANSION MODULE - FORM FACTOR : PLUG-IN MODULE - INTERFACE (BUS) TYPE : EXPANSION SLOT - PORTS QTY : 4 PORTS - DATA LINK PROTOCOL : ATM - DATA TRANSFER RATE : 1.544 MBPS - LINE RATE : T-1 - COMPLIANT STANDARDS : IEEE 802.6 (ATM) CONDITION : REFURBISHED. AVAILABILITY : IN STOCK. WARRANTY : 30 DAYS.