coM.sat ISDN Basic User Manual

coM.sat ISDN Basic
created: page: file:
16/01/09 35 coMsat ISDN Basic Manual V2.7.doc
Note Protection Mark according to DIN 34!
deactivated. This makes sense if only SMS is to be exchanged.
The assignment of the B-channels to the GSM channels is then defined in the “B to
GSM Channel“ box. Fixed assignment determines that the first B channel is
assigned to the first GSM channel. Fixed assignment of the channels can be useful if
e.g. different network providers are to be used for the two GSM channels. If the
channels are freely assigned, the call is assigned to the first free channel. If one
channel is busy, the other is used. In the case of free channel allocation there is the
additional option "Use channels alternatingly". The GSM channels are selected
alternatingly. This feature can be used to balance the load (the cost) evenly between
channels. If this box is not checked, there will be a bias towards one channel!
The “Progress Indicator” setting influences the value of an ISDN information
element. The first value “Call is not end-to-end ISDN” informs the connected PBX
that its call uses a different network to be connected. The other value “In-band
information now available” informs the PBX that an announcement or a tone is
available and must be transferred to the calling user. This value is usually needed for
correct operation, whereas the first value may be needed by specific PBXs. If the
progress indicator causes a problem in the PBX, it is possible to switch it off
completely with the third option “Do not send progress indicator“.
The “Dial Timeout“ is the time that may pass between the last digit of the phone
number being dialled and the selection process is passed into the GSM network. This
time is usually set to 5 secs. It can be reduced to 1 second. The maximum possible
setting is 10 secs. The time between dialling the last digit and hearing the dialling
tone can be reduced by reducing this time.
Note: In some telephone systems, dialling can also be concluded by pressing the “#“
key. In this case there is no waiting time.
The “Send Alerting Message“ option is used to set whether the “Alerting“message
is generated by coM.sat ISDN Basic for calls to PBX. If this option is selected, the
“Alerting“ message is inserted by coM.sat ISDN Basic for an outgoing call after the
“Setup“. If the option is not activated, the “Alerting“message is suppressed and the
call is continued with “Call Proceeding“. Use of this option also depends on the
properties of the connected telephone system.
coM.sat ISDN Basic always generates the dialling tone (exchange dialling tone) itself
and transfers the ringing tone or the network provider announcements to the B-
channel. Whether the ringing tone or the network provider announcements from the
GSM network are used in the B-channel or the ringing tone generated by the
telephone system is used now depends on whether the “Alerting“ option has been
activated or is passive.
The “Enable DTMF in TE Mode“ option must be used if the coM.sat ISDN Basic is
connected to a PBX in TE mode which does not support overlapped sending of dial
information (which is the usual case). Then the GSM number is dialled with the aid of
DTMF tones.
The "March Root Tone" serves to bridge delays with a tone or sequence of tones in
order to prevent the impression that the line is "dead", particularly during the call
setup. The TC35i modules produce the “march root tone” on their own. If the tone of

coM.sat ISDN Basic Specifications

General

Brand	coM.sat
Model	ISDN Basic
Category	Network Router
Language	English