Amulet Hotkey DXZ4-A, Руководство пользователя

Страница: 10 / 44

DXZ4 security edition zero client
Page 10
1.9.1 Factors affecting bandwidth
The bandwidth required depends on several factors, including:
• the number of pixels changing from frame to frame;
• the number and resolution of screens to be encoded;
• settings made by the user.
Exact bandwidth requirements for PCoIP are difficult to predict,
use the values in Table 1 as a guide only:
Setting Bandwidth
Idle display ~ 0
No USB or audio data
~32Kbit/s per pair of
monitors.
General office use (that is,
writing documents)
300-500Kbit/s.
Audio 2 Mbit/s.
A significant display change
(such as minimising or
restoring a window)
4-5Mbit/s
USB transfers < 6Mbit/s of traffic
Playing full-screen video < 70Mbit/s
Table 1: PCoIP.bandwidth.requirements
Example1: A dual head configuration running a word
processor, spreadsheets, and 2D illustrations/designs will
typically use between 1 and 10 Mbit/s.
Example2: A quad video head system running real time full
screen video might peak at 70 Mbit/s.
1.9.2 What happens when available bandwidth is exceeded
In all cases, PCoIP builds to a lossless image. If the required
bandwidth is not available, PCoIP dynamically adjusts the quality
to match. You can also use the zero client management tools
(see 1.12 Zero client management tools ) to optimise perfor -
mance for most conditions.
If bandwidth usage is a concern, we recommend testing and
monitoring on your network. Contact Amulet Hotkey Technical
Support for assistance.
Note: You must register on the Amulet Hotkey website to
access some of the downloadable content.
1.6.2 Security measures for downloaded firmware files
Before you download a firmware update from our website:
1. Confirm that the SSL certificate for the Resources webpage is
valid and issued to the resources.amulethotkey.com domain by
clicking the padlock icon in the address bar of your browser.
After you download the file:
1. Confirm the file has not been modified by comparing its
SHA-256 hash with the SHA-256 hash value listed next to the
download link on the Amulet Hotkey website.
Note: Use the hash calculator of your choice to independently
calculate the SHA-256 hash for the downloaded file.
1.7 IP and MAC addresses
Before you set up a zero client, make a note of these details:
• MAC and IP address of the remote PCoIP host;
• MAC and IP address of the zero client.
You will find the MAC address information written on the
underside of the zero client and on the configuration record/
serial number label of the remote host. You can also use the AWI
(see 1.12.2 ) to find the MAC addresses.
If your network uses DHCP, the host and zero client obtain
their IP addresses from the DHCP server. If no DHCP server is
available, the host and zero client time out after approximately
two minutes and adopt the following default IP addresses:
• Zero client: 192.168.1.50
• Host card: 192.168.1.100
1.8 Remember to change the default password
You must enter a password before changing the configuration
of the zero client. The factory pre-set password for all Amulet
Hotkey zero clients is
ahkdante
.
At first login, the DXZ4-A prompts for a new password. Make
sure you set a more secure password before using the DXZ4-A.
Important! Although the DXZ4-A does not enforce a
password policy for administrator logins, we recommend that
you implement a robust and secure password policy. Where
possible, use a machine-generated password of eight or more
characters. We also recommend that you provide your users
with guidance about the secure handling of passphrases.
1.9 Consider network bandwidth requirements
PCoIP uses the Internet Protocol (IP) to transmit data
between the host and client. The data can be routed over
any IP-compatible infrastructure between offices or across
continents. Performance depends on the available bandwidth
and signal latency.