Add-On Manual INSYS Modem 336 LL i-modul Modem 336 LL (Modem for LeasedLine operation) Aug-06
Copyright © August 06 INSYS MICROELECTRONICS GmbH Any duplication of this manual is prohibited. All rights on this documentation and the devices are with INSYS MICROELECTRONICS GmbH Regensburg. Restrictions of guarantee This handbook contains a concise description. The compilation of the text has been made with the utmost care. Despite all efforts, there may be deviations compared with the actual functions. No guarantee can therefore be given for the accuracy of the contents.
Inhalt 1 BASICS ........................................................................ 4 2 MODEM CONFIGURATION ......................................... 6 2.1 CONFIGURATION MODE ..............................................................6 2.2 TRANSMIT LEVEL ........................................................................7 2.3 PING MODE AS CONNECTION SAFEGUARD ....................................7 2.4 STATUS TRANSMISSION OF THE DIGITAL INPUTS ..............................8 2.
Basics 1 INSYS Modem 336 LL i-modul Modem 336 LL Basics Leased line modems are used when a permanent connection between two data terminals is required. For these connections no regular switched line is used, but a dedicated (leased) line. This can either be a line leased from Telekom, or just an unused pair e.g. on the premises. Leased line modems establish a connection via such a two wire line immediately after being switched on.
INSYS Modem 336 LL i-modul Modem 336 LL Basics Note For INSYS Modem 336 LL 4.1 and i-modul 336 LL 3.0: Use AT&L to switch between two wire operation (AT&L0) and four wire operation (AT&L1). During four wire operation, one pair each is needed for each transmission path (Originate → Answer and Answer → Originate). This will prevent problems with the terminating set (the part of the modem which separates received and sent data) for strongly maladjusted lines.
Modem Configuration INSYS Modem 336 LL i-modul Modem 336 LL 2 Modem Configuration 2.1 Configuration Mode The leased line modems have the same AT command set as the switched line versions. As the modems attempt to establish a connection as soon as they are connected to a power supply unit, they must first be returned to Configuration Mode.
INSYS Modem 336 LL i-modul Modem 336 LL Modem Configuration with AT\N5 at MNP4. Note All settings must be saved using AT&W as they are otherwise lost when the connection is restarted! 2.2 Transmit Level It may be required to adjust the transmit level of the modem to adapt it to the path. The transmit level is set at –15dBm by the manufacturer and can be changed in the S registry (ATS91). Transmit levels from –15 dBm (ATS91=15) to -6 dBm (ATS91=6) may be set.
Modem Configuration INSYS Modem 336 LL i-modul Modem 336 LL Note PING mode will work with all buffered modes. It will not work with direct mode (AT\N1). 2.4 Status Transmission of the Digital Inputs If ping mode is activated (see Chapter 2.3), the status of the alarm inputs is automatically transmitted to the switch outputs of the other modem, together with the ping messages. A status change at one of the alarm inputs will automatically execute the sending of a ping packet to the remote terminal.
INSYS Modem 336 LL i-modul Modem 336 LL 3 Diagnosis and Testing of the Path 3.1 Line Optimization Diagnosis and Testing of the Path To query the line quality and the received signal level a connection must be established between the two modems (CONNECT). Use the Escape sequence “+++” (with > 1 second pause before and after the sequence) to switch to the online command mode. Activate the level with the command AT%L.
Diagnosis and Testing of the Path INSYS Modem 336 LL i-modul Modem 336 LL If the transmission time is still too long, the error correction may be adjusted. The following adjustment possibilities have an effect on the transient response when performing an error correction. ¾ Error correction type: V.42 or MNP4 (AT\N) ¾ For MNP4: Block size (AT\A) If necessary, the error correction may be completely switched off using the command AT\N0.
INSYS Modem 336 LL i-modul Modem 336 LL 4 Technical Data Transmitting power: Receiving sensitivity: Device terminator: Bridgeable distance: Connection standards: Aug-06 Technical Data -15 dBm to -6 dBm (software settings) Approx. –40dBm Approx. 600 Ω Up to approx. 15 km possible (line / interference dependent) V.34+, V.34, V.32bis, V.32, V.22, V.22bis, V.21, V.23, BELL-Norm 103, 212 Data compression according to MNP2-4, V.42 LAPM, MNP 10, 10EC Error correction according to V44, MNP5, and V.
Features 5 INSYS Modem 336 LL i-modul Modem 336 LL Features ¾ Automatically establishes a connection immediately after being connected to a power supply unit. ¾ Automatically re-establishes a connection after an interruption of any kind has occurred, as soon as the failure is remedied. ¾ Connection with or without error correction possible. ¾ Switch to initialization by briefly pressing the RESET key. ¾ All switching operation settings may be used, but not all settings are suitable for LL.
INSYS Modem 336 LL i-modul Modem 336 LL 6 Aug-06 Declaration of Conformity Declaration of Conformity 13