Routing algorithm for incoming calls – 2N VoiceBlue MAX v1.2 User Manual

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in the ascending sequence, i.e. table 1 is searched first, followed by table 2 and
so on.
When a matching prefix is found in a

, the LCR is checked for a

List of networks

valid row. Again, the LCR is searched upwardly, starting from the first row.
If a

number matches a valid number on the respective row,

List of networks

the call time is checked against the routing rule. If no match is found, the next
LCR row is checked.
If the

number and call time meet the routing rules, the call is

List of networks

routed to the module selected in the


Assignment to GSM groups

according to the first routing rule included in the

section and given in the



GSM outgoing groups
Moreover, call duration limiting timer can be selected for the outgoing call.
If the selected GSM/UMTS module is occupied or has a low credit, the algorithm
returns to the preceding step but considers the next

row instead of the


first one. If no record is found in this section, the next LCR row is used.
If the selected GSM/UMTS module is available and has a sufficient credit, the
GSM gateway will start dialling the GSM number.
If the calling subscriber number has an unknown prefix or all routes are


rejects the connection request.

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The outgoing call is not billed until the called party answers the call.
The GSM network signals the call answering moment and the GSM gateway
transfers this information to the SIP Proxy.
It can be set for GSM outgoing calls that the calling subscriber should be sent the
connection tone* instead of a silence between the request sending to GSM and
the ringing tone.

* This option can be activated for TC35i modules.

Routing Algorithm for Incoming Calls

Incoming calls are processed according to the

parameter setting in the



table. The following options are available:

incoming groups

Reject/ Ignore incoming calls – incoming calls are not routed to the VoIP
network. On the GSM side, the connection request is either rejected or ignored
(the caller hears the check ringing tone).
If the above mentioned option is not selected, the CLIP routing table is checked.
If the calling number is found, it is checked for CallBack first. If the CallBack

function is enabled for this number,

will ignore the

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incoming call and set up a CallBack to GSM after the caller hangs up. If the
AutoDial function is enabled for the calling number, the caller will be routed
directly to the extension number entered in the AutoDial item. If both the

CallBack and AutoDial functions are activated,

will ignore

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the incoming call and set up a call to GSM after the caller hangs up.
Simultaneously, a call to the VoIP extension will be set up and then the calls will
be connected. If the CallBack function is enabled and the caller fails to hang up

within 10 s,

will try to set up a call according to the

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AutoDial settings.
In case the CLIP routing function is disabled or the calling number is not included
in the CLIP routing table, the Dynamic CLIP routing table is checked. If the