JUNIPER SRX-MP-1T1E1-R 1-PORT T1/E1 MINI-PHYSICAL INTERFACE. KEY FEATURES : CHANNEL SERVICE UNIT/DATA SERVICE UNIT (CSU/DSU) TO ELIMINATE THE NEED FOR A SEPARATE EXTERNAL DEVICE 56-KBPS AND 64-KBPS OPERATING MODES INDEPENDENT INTERNAL AND EXTERNAL CLOCKING OPTION ALARM REPORTING WITH A 24-HOUR HISTORY MAINTAINED LOOPBACK, BERT, FDL (T1 ONLY), AND LONG BUILDOUT (T1 ONLY) DIAGNOSTICS MULTILINK FRAME RELAY AND MULTILINK PPP SUPPORT ANSI TI.107, TI.102 GR 499-CORE, GR 253-CORE AT&T PUB 54014 ITU G.751, G.703 CONDITION : NEW FACTORY SEALED. . .