User`s manual

Roaming

This parameter allows to log the gateway into a foreign network (roaming). Practically,

e.g. in boarder areas roaming an undesirable logging into a foreign network may happen

as a result of signal variations or a GSM cell failure.

- On, roaming is authorised, the gateway can log into a foreign network (this function

works only if your tariff rate enables full roaming with available foreign networks; if more

foreign networks are available and you want to prefer any of them, then add it into the list

of preferred networks on your SIM card using any GSM telephone). Note that such

roaming means higher incoming and outgoing call costs from/into the GSM network.

- Off, roaming is prohibited, the gateway cannot log into a foreign network.

Transmit/Receive level

These parameters can change the level of transmission and reception volumes. Such a

change may, in some cases, impair the other transmission parameters, e.g. echo. Do not

change these optimally set parameters unless absolutely necessary.

Echocanceller

This parameter switches the module mode and activates the echo-suppressing circuit.

Caution! It may be activated in production numbers 1-300-XXXX and higher!

Preferred network

This paraments defines to which GSM network the GSM module will be logging on (in

case that at the installation place there are more available GSM networks). To this

column you have to enter „Network code“ of the selected GSM network – This is the

international ID of the GSM network (gennerally it contains five digits).

B-channel connection delay [ms]

Defines the time delay for connection to the GSM network (with outgoing calls to the

GSM network), after which the calling subscriber hears tones coming from the GSM

network - this delay eliminates connection-establishing tones. The connection is

established upon answer of the called subscriber regardless of the length of this

parameter. The optimum value is about 5,000 ms.

Network connectivity timeout [ms]

This parameter defines the timeout after which the module, which failed to log into a GSM

network, will be restarted and logged into the GSM network with priority. The SIM card

must be inserted and the correct PIN code entered. The optimum value is about 60,000

ms.

Relax Delay [ms]

Defines the delay time between the end of one call into GSM and the beginning of

another call into GSM (via one and the same GSM module). You are advised to select

2,000ms in case your ISDN GSM gateway is heavily used for calling into the GSM

network – this delay makes difficult the detection of your ISDN GSM gateway by the

GSM network and avoids call rejections (caused by the GSM network). CAUTION! The

maximum setting is 2,500ms!!!

Password

After the correct password is entered, you can add auxiliary AT commands for GSM

module communication into input boxes. However, you are not recommended to add

these commands because of the risk of GSM module dysfunction or damage.