Cisco Cisco IOS Software Release 15.0(1)M

VWIC2-2MFT-G703: 2-port T1/E1 voice/WAN with drop and insert (D&I) and unstructured E1 
(G703)

AIM:

AIM-VPN/BPII-PLUS: DES/3DES/AES VPN Encryption/Compression card

AIM-VPN/SSL-1: Encryption module support

USB flash:

MEMUSB-64FT

MEMUSB-128FT

MEMUSB-256FT

The Cisco 1841C router supports only the following modules:

AIM-VPN/SSL-1: Encryption module support

HWIC-1ADSL: 1 ADSL port

HWIC-1FE: 1-port 10/100 routed-port HWIC

HWIC-2FE: 2-port 10/100 routed-port HWIC

HWIC-1GE-SFP: 1-SFP slot GigE HWIC

HWIC-16A: 16-port async HWIC

HWIC-1T-C: 1-port serial high-speed WIC

HWIC-2T-C: 2-port serial high-speed WIC

HWIC-4T: 4-port serial HWIC

HWIC-2A/S: 2-port async/sync serial high-speed WIC

HWIC-4A/S: 4-port async/sync serial HWIC

HWIC-8A: 8-port async HWIC

HWIC-8A/S-232: 8-port async/sync serial HWIC, EIA-232

HWIC-3G-HSPA: 3G WWAN HWIC-HSPA/UMTS/EDGE/GPRS

HWIC-4ESW-C: 4-port single-wide 10/100BASET Ethernet switch HWIC

VWIC2-1MFT-G703-C: 1-port T1/E1 voice/WAN with drop and insert (D&I) and unstructured E1 
(G703)

VWIC2-2MFT-G703-C: 2-port T1/E1 voice/WAN with drop and insert (D&I) and unstructured E1 
(G703)

WIC-1AM-V2: 1-port analog modem WIC

WIC-2AM-V2: 2-port analog modem WIC

The Cisco 1861 router has the following software components: 

Cisco Unified Communications Manager Express (Cisco Unified CME)

Cisco Unity Express

Security