Cisco 2901 Integrated Services Router voice bundle with PVDM3-16 DSP module, CME/SRST licensing for up to 25 phones, and unified communications support. Note: Part number lists "Interactive" brand but research confirms this is a Cisco product; the -9X5X4 maintenance suffix could not be verified.
Specification
Cisco 2901 ISR with PVDM3-16 digital signal processor
FL-CME-SRST-25 survivable remote site telephony license (25 phones)
UC License PAK for Cisco Unified Communications Manager Express
Supports voice, data, and video services
Up to 16 concurrent voice channels for transcoding and conferencing
Built-in failover protection and call processing