Cisco Cisco IOS Software Release 12.4(2)XB6

The Cisco IOS Release 12.4(4)XC release supports the following Cisco 1700 series routers:

Cisco 1751 and 1751-V 

Cisco 1760 

The Cisco 1751, Cisco 1751-V, and Cisco 1760 routers run data or data-and-voice images, providing 
digital and analog voice support. 

For descriptions of existing hardware features and supported modules, see the hardware installation 
guides, configuration and command reference guides, and additional documents specific to the 
Cisco 1700 series routers, which are available on 

 at the following location:

To determine which version of Cisco IOS software is currently running on your Cisco 1700 series router, 
log in to the router and enter the show version privileged EXEC command. The following sample output 
from the show version command indicates the version number.

Router> show version

Cisco Internetwork Operating System Software

1751

1751-V 

1760

Cisco 1700 IOS 
ADVANCED SECURITY

ADVANCED 
SECURITY

c1700-advsecurityk9-mz

32

96

Cisco 1700 IOS 
ENTERPRISE BASE W/O 
CRYPTO

ENTERPRISE 
BASE W/O 
CRYPTO

c1700-entbase-mz

32

96

Cisco 1700 IOS 
ENTERPRISE BASE

ENTERPRISE 
BASE

c1700-entbasek9-mz

32

256

Cisco 1700 IOS 
ENTERPRISE SERVICES 
W/O CRYPTO

ENTERPRISE 
SERVICES W/O 
CRYPTO

c1700-entservices-mz

32

128

Cisco 1700 IOS 
ENTERPRISE SERVICES

ENTERPRISE 
SERVICES

c1700-entservicesk9-mz

32

128

Cisco 1700 IOS IP BASE 
W/O CRYPTO

IP BASE W/O 
CRYPTO

c1700-ipbase-mz

32

64

Cisco 1700 IOS IP BASE

IP BASE

c1700-ipbasek9-mz

32

96

Cisco 1700 IOS IP VOICE 
W/O CRYPTO

IP VOICE W/O 
CRYPTO

c1700-ipvoice-mz

32

128

Cisco 1700 IOS IP VOICE

IP VOICE

c1700-ipvoicek9-mz

32

128

Cisco 1700 IOS SP 
SERVICES

SP SERVICES

c1700-spservicesk9-mz

32

128