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Community Member

3750X-48PF-E USB Console Does Not Work

I tried on two different computers (Windows 7 x64 and Windows 7 x86).

I can't get the USB console to work on my 3750X.

I checked device manager and it shows the port install OK, no problems.

When I try to connect to it using Putty, it acts like it's not there saying "Unable to open serial port"


Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 15.2(1)E2, RELEASE SOFTWARE (fc1)
Technical Support:
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Thu 13-Mar-14 03:26 by prod_rel_team

ROM: Bootstrap program is C3750E boot loader
BOOTLDR: C3750E Boot Loader (C3750X-HBOOT-M) Version 12.2(53r)SE2, RELEASE SOFTWARE (fc1)

core3750x uptime is 3 hours, 38 minutes
System returned to ROM by power-on
System restarted at 21:27:30 EDT Tue Mar 29 2011
System image file is "flash:/c3750e-universalk9-mz.152-1.E2/c3750e-universalk9-mz.152-1.E2.bin"
Last reload reason: Unknown reason


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.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

License Level: ipservices
License Type: Permanent
Next reload license Level: ipservices

cisco WS-C3750X-48P (PowerPC405) processor (revision A0) with 262144K bytes of memory.
Processor board ID FDO1635P0VH
Last reset from power-on
4 Virtual Ethernet interfaces
1 FastEthernet interface
52 Gigabit Ethernet interfaces
2 Ten Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : FC:99:47:F8:C1:80
Motherboard assembly number     : 73-12553-06
Motherboard serial number       : FDO16350G6L
Model revision number           : A0
Motherboard revision number     : A0
Model number                    : WS-C3750X-48PF-E
Daughterboard assembly number   : 800-32727-03
Daughterboard serial number     : FDO163509K9
System serial number            : FDO1635P0VH
Top Assembly Part Number        : 800-31324-03
Top Assembly Revision Number    : B0
Version ID                      : V03
CLEI Code Number                : COMJZ00ARC
Hardware Board Revision Number  : 0x04

Switch Ports Model              SW Version            SW Image
------ ----- -----              ----------            ----------
*    1 54    WS-C3750X-48P      15.2(1)E2             C3750E-UNIVERSALK9-M

Configuration register is 0xF


Any suggestions?

VIP Super Bronze

Try downloading the driver from the link


Community Member

That is the software I am

That is the software I am using (or trying to use).

MD5: eff2e955edcdc70209e6f9c8f6bd59cd

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