Upgrade Router 2811 using usb

1. Insert usb pendrive
*Nov 12 15:35:21.911: %USB_HOST_STACK-6-USB_DEVICE_CONNECTED: A Full speed USB device has been inserted in port 1.
*Nov 12 15:35:22.619: %USBFLASH-5-CHANGE: usbflash1 has been inserted!
#format usbflash1:
Format operation may take a while. Continue? [confirm]
Format operation will destroy all data in “usbflash1:”.  Continue? [confirm]
Format: All system sectors written. OK…
Format: Total sectors in formatted partition: 15661056
Format: Total bytes in formatted partition: 8018460672
Format: Operation completed successfully.
Format of usbflash1: complete
#dir usbflash1:
Directory of usbflash1:/
No files in directory
8002793472 bytes total (8002789376 bytes free)
#dir usbflash1:
Directory of usbflash1:/
3  -rw-    68491480  Nov 12 2014 22:44:36 +00:00  c2800nm-adventerprisek9_ivs_li-mz.151-4.M9.bin
4  -rw-     1626367  Nov 12 2014 22:47:14 +00:00  C2800NM_RM2.srec.124-13r.T11
8002793472 bytes total (7932657664 bytes free)
#sh rom-monitor
ReadOnly ROMMON version:
System Bootstrap, Version 12.3(8r)T7, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2004 by cisco Systems, Inc.
No upgrade ROMMON programmed or not yet run
Currently running ROMMON from ReadOnly region
ROMMON from ReadOnly region is selected for next boot
#upgrade rom-monitor file usbflash1:C2800NM_RM2.srec.124-13r.T11
This command will result in a  ‘power-on reset’ of the router!
Continue? [yes/no]: yes
#copy flash:c2800nm-adventerprisek9_ivs_li-mz.151-4.m6.bin usbflash1:
Destination filename [c2800nm-adventerprisek9_ivs_li-mz.151-4.m6.bin]?
#delete c2800nm-adventerprisek9_ivs_li-mz.151-4.m6.bin
Delete filename [c2800nm-adventerprisek9_ivs_li-mz.151-4.m6.bin]?
Delete flash:/c2800nm-adventerprisek9_ivs_li-mz.151-4.m6.bin? [confirm]
#copy usbflash1:c2800nm-adventerprisek9_ivs_li-mz.151-4.M9.bin flash:
Destination filename [c2800nm-adventerprisek9_ivs_li-mz.151-4.M9.bin]?

(config)#boot system flash c2800nm-adventerprisek9_ivs_li-mz.151-4.M9.bin

Check current CME version
#show telephony-service
CONFIG (Version=8.6)
=====================
Version 8.6
Max phoneload sccp version 17
Max dspfarm sccp version 18
Cisco Unified Communications Manager Express
CME Installation and Configuration
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