Epson TM-U220-i Technical Reference Guide

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Chapter 2 Setup
2
Verifying the integrity of Web contents with md5 files
You can verify the integrity of auto updating Web contents with md5 files. When this product
acquires a Web content file, an md5 file is downloaded to the Web server, if available. The md5 value
of the md5 file is compared to the md5 value calculated from the auto updating file an d, if the values
match, the auto updating file is unpacked and extracted. If these values are inconsistent, the file is
not unpacked and extracted.
Preparation
•Create an md5 file with the same file name as the auto updating file. Only write the md5 value of
the auto updating file (zip) in the file.
•Save the md5 file to the same folder as the auto updating file.
Check Verification
You can check the results of running an automatic update from [Information] - [Web Contents] -
[Status of Last Automatic Update] in the EPSON TMNet WebConfig.
For detail, refer to
"Information - Web Contents" on page 86.
Certificate files
You can automatically update Server authentication certificates and SSL authentication certificates
using the Web contents automatic update function.
You can download and use Server authentication certificates for this product. For det
ail, refer to
"System Settings - Security - SSL" on page 98.
Make sure to update certificate files, including certificates in use.
File Specifications
Save certificate files to the following folders.
•Server authentication certificate: ssltrustedcerts
• SSL authentication certificate: sslsevercerts
Use the following file names for SSL authentication certificate files.
Make sure to replace certificate files by deleting existing certificate files and saving new
certificate files. You will be unable to connect if certificate files currently in use are not included.
Make sure to include certificates currently in use in the auto updating file each time.
Type File name
Certificate file SeverCrt.crt
Private key file ServerKey.key
Certificate chain file ChanCrt.crt

Epson TM-U220-i Specifications

General

Type	POS printer
Color	Yes
Print technology	Dot matrix
Wi-Fi standards	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Maximum roll diameter	83 mm
Standard interfaces	Ethernet, Parallel, RS-232, RS-485, USB, Wireless LAN
Serial interface type	RS-232, RS-485
Connectivity technology	Wired & Wireless
Electromagnetic compatibility	VCCI class A, FCC class A, CE marking, AS/NZS 3548 class B
Mean cycles between failures (MCBF)	18000000
Safety	UL, CSA, TÜV (EN60950)
Mean time between failures (MTBF)	180000 h
Product color	Gray

Weight and Dimensions

Depth	248 mm
Width	160 mm
Height	138.5 mm