... slots, 2 DSP slots, 1 ISM slot, 256MB CF default , 512MB DRAM default, IP BaseCISCO2911/K9Cisco 2911 with 3 onboard GE, 4 EHWIC ... slots, 2 DSP slots, 1 ISM slot, 256MB CF default , 512MB DRAM default, IP BaseCISCO2921/K9Cisco 2921 with 3 onboard GE, 4 EHWIC ... slots, 3 DSP slots, 1 ISM slot, 256MB CF default , 512MB DRAM default, IP BaseCISCO2951/K9Cisco 2951 with 3 onboard GE, 4 EHWIC ...