[cisco-voip] upgrading from ios version 12.4(15)T to latest 12.4(24)T

[anand]

HI sh version on my router ha the following ouput
2#sh version
Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version
12.4(15)T7,
RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Wed 13-Aug-08 17:09 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

R2 uptime is 3 minutes
System returned to ROM by power-on
System image file is "flash:c2800nm-spservicesk9-mz.124-15.T7.bin"


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

If you require further assistance please contact us by sending email to
export at cisco.com.

Cisco 2851 (revision 53.51) with 249856K/12288K bytes of memory.
Processor board ID FTX1321AH5N
2 Gigabit Ethernet interfaces
2 ISDN Basic Rate interfaces
4 Voice FXO interfaces
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
126000K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

can i upgrade to the latest ios version 12.4(15)T to latest 12.4(24)T with
the hardware i am having.
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