I have a current T-1 running on a WIC-1DSU-T1-V2. I am planning on getting a second T from the carrier for a mutlilink connection. Any problem mixing the current card with a HWIC-1DSU-T1 ?
I noticed the WIC is going EOL
Q. How are these HWICs different from WIC-1DSU-T1-V2, WIC-1T, WIC-2T, and WIC-2A/S?
A. The new HWICs have the same software features as the older WICs. The HWIC-1T has a Cisco Smart Serial connector where the WIC-1T had a DB-60 connector. The front-end NEBS protection of HWIC-1DSU-T1 has also been improved.
Please check out this link.
You should be fine as long as Box can recognize both interfaces. Then go configure multilink functions.