Hi Met,
This scenario is supported. Here's some corroborating text from the UCCX SRND:
Remote Agent Over Broadband
Cisco Unified CCX supports remote agents (for example, at-home agents) using Cisco Unified IP Phone over a broadband internet connection. The Cisco Voice and Video Enabled IPSec VPN (V3PN) ADSL or Cable connection can use a Cisco 800 Series router as an edge router to the broadband network. The Cisco 800 Series router can provide the remote agent with V3PN, Encryption, Network Address Translation (NAT), Firewall, Cisco IOS Intrusion Detection System (IDS), and QoS on the broadband network link to the Cisco Unified CCX campus. Remote agent V3PN aggregation on the campus is provided via LAN to LAN VPN routers.
Cisco recommends using the Cisco 800 Series router with the following features for remote agent over broadband:
* Quality of Service (QoS) with Low-Latency Queuing (LLQ) and Class-Based Weighted Fair Queuing (CBWFQ) support
* Managed Switch
* Power over Ethernet (optional)
Hope this helps.
Regards,
Michael.