HWIC-1B-UHWIC-1DSU-56K4=

C881-K9
1RU
LAN: 4 x 10Base-T/100Base-TX – RJ-45
Management: 1 x console – RJ-45
WAN : 1 x 10Base-T/100Base-TX – RJ-45
USB : 1 x 4 PIN USB Type A
2 port integrated PoE
Up to 15 Mbps
256 (default) / 768 MB (Max)
128 MB

VWIC3-1MFT-T1/E1=
Number of Ports 1
T1 Support
E1 Support
Data Support WIC Mode
Voice Support VIC
Drop-and-Insert Multiplexing