Measurement-computing WEB-TC Uživatelský manuál stáhnout pdf (Strana 33)

WEB-TC User's Guide Specifications

Network protocols

Table 14. Factory default specifications

Protocols implemented

IP, ARP, ICMP, DHCP, UDP, TCP, NBNS, HTTP

Protocols using UDP or TCP for transport communicate on their IETF assigned

ports (for example HTTP on TCP port 80).

UDP messaging protocol

UDP port 54211

TCP downloading protocol

TCP port 54267

HTTP 1.0 alternate port

TCP port 49152-65535 (not including 54267)

Network name

"webtc_xxxxx", where xxxxx is the device's serial number

Network name publication

via NBNS (responds to b-node broadcasts, therefore only available on the local

subnet)

Max number of simultaneous HTTP

connections

Max number of non-HTTP TCP

sockets

Network security

Table 15. Factory default specifications

Security implementation

IP address based session manager with user-name/password login for

configuration and control transactions (data is not secured.)

Session timeout

5 minutes with no activity

User-name/password encryption

Base64 (The default web page does not support encryption if Javascript is

disabled in the web browser.)

Vulnerabilities

Denial of service attacks, user-name/password spoofing, script probing and

simple decryption

LED displays and the factory reset button

Table 16. LED and button configurations

POWER/COMM LED (top)

4.75 V < V

ext

< 5.25 V On

ext

< 4.75 V

ext

> 5.25 V Off (power fault)

Blinks during microcontroller communications.

LINK/ACTTIVITY LED (bottom)

On when there is a valid Ethernet connection and blinks when an Ethernet packet

is sent or received.

Factory reset button

When held for 3 seconds, the POWER LED will turn off for a short time,

indicating a reset is in process. When the POWER LED turns back on, reset is

complete and the factory default network settings have been restored.

Environment

Table 17. Environmental specifications

Operating temperature range

0 to 55 ° C

Storage temperature range

-40 to 85 ° C

Humidity

0 to 90% non-condensing

Mechanical

Table 18. Mechanical specifications

Dimensions

127 mm (L) x 88.9 mm (W) x 35.56 (H)

1 2 ... 28 29 30 31 32 33 34 35 36

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