Specifications

TC65 Release Notes

Strictly Confidential / Released

TC65_rn_v01.041 Page 5 of 8 17.10.2005

2 General Hardware and Software Limitations

• Noise Reduction and Echo Cancellation are working only at low quality level. Basic

Handsfree operation (Speakerphone) is not yet supported. The Ringing Tone generator

does not always work reliably.

• The feature RTC wake-up from POWER DOWN mode is not available. Programming an

alarm time (AT+CALA) will not wake up the module automatically. Despite this, AT+CALA

can be used any time during normal operation.

• Autobauding does not work reliably. It is recommended to set a fixed bit rate. By default,

when shipped from factory or after a firmware update, the modules are set to

115200 bps.

3 Hardware Limitations Specific to the TC65 Terminal

This section applies only to the TC65 Terminal.

After switching the TC65 Terminal off by using the EMERGOFF signal wait at least 1 second

(from the deactivation of EMERGOFF) before restarting the TC65 Terminal. During this

1 second period, invalid states may occur on the GPIO connector and on the serial interface.

4 Software Limitations

• When changing from data to command mode, the TC65 fails to indicate the correct

response and, instead, returns a response related to the last event. The error occurs with

CSD connections, connections set up by using the Internet Service AT commands of

TC65 and the operation of I

C and SPI.

For example, after the remote party has closed the CSD connection, the TC65 returns

the response “CONNECT 9600/RLP” instead of “NO CARRIER”.

• The maximum number of concurrent IP sockets is 8, due to memory limitations. This

includes all socket connections, no matter whether established from the Java application

or by using the Internet Service AT commands of TC65.

Please consider that the Java classes SocketConnection, Http(s)Connection,

SecureConnection and UDPDatagramConnection use up one socket each. The amount

of sockets for each ServerSocketConnection is two sockets for queued connection

requests and one socket reserved to accept the next connection. Each further accepted

connection occupies one socket.

• The Socket Listener may not work properly if the service is re-opened shortly after having

closed the Socket Listener. To ensure that the service works correctly the host is

required to wait at least two minutes before re-opening a Listener.

• The handling of the Master Phone Code (PH-SIM PUK) currently differs from the

description provided in [1]. This release of TC65 requires both the Master Phone Code

and the new “PS” password be given at the same time. So, at present, the TC65 will