Before Enjoying Your New IP Telephone Set
1. Please read this manual carefully
2. Avoid exposure to heat sources or direct sunlight for your ITS821
3. You may clean only the surface of your ITS821 with a slightly wet dust-cloth
4. Never use any chemicals for cleaning
5. Be careful not to drop any liquid on your ITS821
6. Be careful to place your ITS821 on a flat surface without any vibrations. Otherwise
it may drop and may be damaged or may cause damages
7. Never connect any connectors on your ITS821 to the MAINS or any other high
voltage or current sources
8. Always use the original 5Vdc mains power adapter with your ITS821.
9. Connect your ITS821 to IP network through its ethernet interface. Contact your
local Telesis Dealer for his assistance.
10. Your ITS821 does not contain any parts for maintenance. In case of any failure, do
not open any covers of your ITS821. Please contact your local Telesis Dealer for his
assistance.
11. Do not loose any screws on your ITS821
Thank you
... for purchasing the ITS821 IP Telephone Set. It is specially designed for Telesis
brand IP PBX and switching systems for your comfort. It is manufactured to the
highest quality standards and tested vigorously to comply with requirement for its
product specifications.
In this manual, you will find basic information about quickly setting up your IP
Telephone Set and starting to use it. We hope that this simplified manual will get you
started and help you familiarize with your new IP Telephone Set.
For the appropriate operation of your new IP Telephone Set, your Telesis PBX or
switching system may need additional hardware, programming and/or licencing.
Please contact your local Telesis Dealer for details.
We hope that your ITS821 IP Telephone Set will serve you well and provide you with
all your communication needs now and in the future.
ITS821 Package
1. Telephone body / 1 pc
2. Handset / 1 pc
3. Handset to body cord / 1 pc
4. Line cord / 1 pc
5. Mains power adapter (5Vdc) / 1 pc
6. Installation and User’s manual / 1 pc
xSIP (eXtended SIP) Protocol
xSIP (eXtended SIP) protocol has been developed by Telesis. The main purpose of its
development is to make some value-added services in Telesis IP PBX and switching
systems to be applicable for VoIP calls too. Presently, Telesis offers two products with
xSIP protocol. One is the ITS821 IP Telephone Set, and the other is the XPhone IP
Softphone (with three editions; PC, Pocket PC , and Smartphone). All products bring
the comfort of Telesis digital sets over IP. Almost all the functions of Telesis digital
telephones are also applicable over IP with using xSIP protocol. To illustrate, ITS821
and XPhone PC are with a busy display panel showing the current status (idle, busy,
ringing, etc.) of 120 pre-programmed users in a Telesis. Features and value added
services provided by xSIP protocol are not available in the standard SIP protocol.
In brief, although Telesis systems support SIP protocol and allow standard SIP IP
telephones to be registered, Telesis xSIP products like ITS821 bring more comfort for
the users.
3