4 Enhanced high-speed WAN interface. I´m programing PRI with 32 channels, but say 2 extra DSP are required. All Cisco Series Integrated Services Routers offer embedded hardware encryption acceleration, voice- and video-capable digital signal processor (DSP) slots. Cisco VS Huawei Vendor Product. i would like to confirm that PVDM can be installed in each slots, which allows totaling of (very expensive, i know). 1 SMMB CFMB [HOST] Expansion Slot(s), 4 (total) / 4 (free) x HWIC ¦ 3 (total) / 3 (free) x PVDM. Description Huawei Advantages Cisco w/3 GE,4 EHWIC,3 DSP,1 SM,MB CF,MB CISCO CISCO. You can also insert an NM-HDV2 module with PVDM2. Yes. % The remaining dsp resources are enough for 0 time slots. A. All Cisco Series Integrated Services Routers offer embedded hardware encryption acceleration, voice- and video-capable Digital Signal Processor (DSP) slots. I have a high demand to use PVDM's. Cisco CISCO/K9 3x 1GE 4x EHWIC Slots 3x DSP Slots 1x ISM Slot Router · 1 x 1GE SFP Uplink Port · 1 x Console Management, 1 x Console Mini-USB Type B Serial, 1. Cisco CISCO/K9 Cisco Router w/3 GE,4 EHWIC,3 DSP,1 SM,IPB 3 onboard digital signal processor slots. 4 EHWIC. Cisco CISCOK9, Cisco w/3 GE. 3 DSP. You can install PVDM2 modules on the motherboard PVDM slots using special adaptor cards (PVDM2- ADPTR). % For current. slots.