# Enabling Emergency Call

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Descriptions

According to the GSM official terminology (GSM Recommendations 02.03 and 02.30), an emergency call is a mobile originating call to a nearby emergency call center (e.g. the police). Emergency calling is a teleservice derived from telephony, but it provides a simple and unified procedure to set up an emergency call. The emergency call will be connected at no charge.

GSM prescribes a standard emergency number (i.e. dialing 112) which is accepted throughout the world. In addition, the mobile equipment manufacturer can provide an SOS key which initiates this internationally accepted emergency number when pressed. The PLMN operator can install some abbreviated (emergency) numbers for certain country-dependent or area-dependent emergency service centers. Calls are then routed to a nearby service point, based on the cell-oriented routing feature.

Implementation

| Enable Non-registered or no SIM Emergency Call

1.Go to EMS >Configuration >NSS >VLR.

2.Click the button at the upper right corner.

1.On the System tab, configure the necessary parameters given in the following table.

2.Click the button to update parameters to application servers.

Sub-parameter | Description (Click highlight SAVE after change) | Recommended Value
EC Setup Allowed | Enabling this parameter allows a non-registered mobile or a mobile with no SIM to make emergency calls. | Enable

| Enable Location Area Based Emergency Call

For example: Subscriber dials 112, MSC transforms 112 to 623157 and routes it to emergency center.

1.Refer to previous section to Enable Local Call.

2.Go to EMS >Configuration >NSS >MSC.

3.Click the button at the upper right corner.

1.Click on the proper hyperlinked number to open the Location Area configuration window.

2.Choose an idle item from the 0 to 7 Emergency Number list and record its index number.

3.Add the Emergency Number which will be routed to emergency center.

4.Click the button to update Location Area parameters to application servers.

Sub-parameter | Description | Recommended Value
Emergency Number 0~7 | The emergency number, which subscriber dialed in the specific Location Area, will be transformed to this number and route to the emergency center. | 623157

1.Click on the proper hyperlinked number to open the Dialing Prefix Set configuration window.

2.Click the hyperlinked number in the Dialing Prefix Entries to open the Dialing Prefix table.

3.Click New at the bottom of the Prefix table to create Emergency Number (112) prefix.

4.Configure the necessary parameters given in the following table.

5.Click the button to update Prefix parameters to application servers.

6.Repeat step 3 to 5 to add the transformed Emergency Number (623157) prefix.

Sub-parameter | Description | Recommended Value
Prefix | A combination digits that dial to originate a call. | 112
TON Incoming Call | The original type of the incoming number. It is specified by originating node for terminating node to route this call with proper dialed number manipulation. | Unknown
Flag | Enable or disable this prefix. | Enable
Length of Dialed Number | The length of the dialed number. | 3
Call Type | Service type of the outgoing call. | Emergency
Emergency Type | It's correlated with the index of emergency number selected in Location Area. | --
RSC | Routing Selection Code is a "route selection" index to select a trunk group in a routing zone pointing to the destination. | --
CDR Flag | Enable or disable the Call Detail Record generation of this prefix. | Enable
MNP Flag | Enable if this prefix relating to Mobile Number Portability service. | Disable
Premium Call Flag | Enable if this prefix relating to Premium Call service. | Disable
Call Allow Flag | Subscribers with OSB type 1 can only make calls to this dialing prefix with Call Allow Flag enabled. | Disable
Call Bar Flag | Subscribers with OSB type 2 can't make calls to this dialing prefix with Call Bar Flag enabled. | Disable
TON Outgoing Call | The transformed type of the incoming number, which will be routed to the associated trunk group. | Unknown
Out Trunk Deletion Count | Number of digits to be deleted from the beginning of the dialed number. | 0
Out Trunk Inserted Digits | Digits of the number to be added to the front of the dialed number. | N/A
E.164 International Deletion Count | Number of digits to be deleted from the beginning of the incoming number. | 0
E.164 International Inserted Digits | Digits of the number to be added to the front of the incoming number. | N/A

Sub-parameter | Description | Recommended Value
Prefix | A combination digits that dial to originate a call. | 623157
TON Incoming Call | The original type of the incoming number. It is specified by originating node for terminating node to route this call with proper dialed number manipulation. | Unknown
Flag | Enable or disable this prefix. | Enable
Length of Dialed Number | The length of the dialed number. | 6
Call Type | Service type of the outgoing call. | Normal
Emergency Type | It's correlated with the index of emergency number selected in Location Area. | N/A
RSC | Routing Selection Code is a "route selection" index to select a trunk group in a routing zone pointing to the destination. | --
CDR Flag | Enable or disable the Call Detail Record generation of this prefix. | Enable
MNP Flag | Enable if this prefix relating to Mobile Number Portability service. | Disable
Premium Call Flag | Enable if this prefix relating to Premium Call service. | Disable
Call Allow Flag | Subscribers with OSB type 1 can only make calls to this dialing prefix with Call Allow Flag enabled. | Disable
Call Bar Flag | Subscribers with OSB type 2 can't make calls to this dialing prefix with Call Bar Flag enabled. | Disable
TON Outgoing Call | The transformed type of the incoming number, which will be routed to the associated trunk group. | Unknown
Out Trunk Deletion Count | Number of digits to be deleted from the beginning of the dialed number. | 0
Out Trunk Inserted Digits | Digits of the number to be added to the front of the dialed number. | N/A
E.164 International Deletion Count | Number of digits to be deleted from the beginning of the incoming number. | 0
E.164 International Inserted Digits | Digits of the number to be added to the front of the incoming number. | N/A

| Enable Cell Based Emergency Call

For example: Subscriber dials 112, MSC transforms 112 to 623157 and routes it to emergency center.

1.Refer to previous section to Enable Local Call.

2.Go to EMS >Configuration >NSS >MSC.

3.Click the button at the upper right corner.

1.Click on the proper hyperlinked number to open the Location Area configuration window.

2.Click the hyperlinked number in the Cell Entries to open the Cell table.

3.Click on the proper hyperlinked number to open the Cell configuration window.

4.Choose an idle item from the 0 to 7 Emergency Number list and record its index number.

5.Configure the Emergency Number which will be routed to emergency center.

6.Click the button to update Cell parameters to application servers.

Sub-parameter | Description | Recommended Value
Emergency Number 0~7 | The emergency number, which subscriber dialed in the specific Location Area, will be transformed to this number and route to the emergency center. | 623157

1.Click on the proper hyperlinked number to open the Dialing Prefix Set configuration window.

2.Click the hyperlinked number in the Dialing Prefix Entries to open the Dialing Prefix table.

3.Click New at the bottom of the Prefix table to create Emergency Number (112) prefix.

4.Configure the necessary parameters given in the following table.

5.Click the button to update Prefix parameters to application servers.

6.Repeat step 3 to 5 to add the transformed Emergency Number (623157) prefix.

Sub-parameter | Description | Recommended Value
Prefix | A combination digits that dial to originate a call. | 112
TON Incoming Call | The original type of the incoming number. It is specified by originating node for terminating node to route this call with proper dialed number manipulation. | Unknown
Flag | Enable or disable this prefix. | Enable
Length of Dialed Number | The length of the dialed number. | 3
Call Type | Service type of the outgoing call. | Emergency
Emergency Type | It's correlated with the index of emergency number selected in Location Area. | --
RSC | Routing Selection Code is a "route selection" index to select a trunk group in a routing zone pointing to the destination. | --
CDR Flag | Enable or disable the Call Detail Record generation of this prefix. | Enable
MNP Flag | Enable if this prefix relating to Mobile Number Portability service. | Disable
Premium Call Flag | Enable if this prefix relating to Premium Call service. | Disable
Call Allow Flag | Subscribers with OSB type 1 can only make calls to this dialing prefix with Call Allow Flag enabled. | Disable
Call Bar Flag | Subscribers with OSB type 2 can't make calls to this dialing prefix with Call Bar Flag enabled. | Disable
TON Outgoing Call | The transformed type of the incoming number, which will be routed to the associated trunk group. | Unknown
Out Trunk Deletion Count | Number of digits to be deleted from the beginning of the dialed number. | 0
Out Trunk Inserted Digits | Digits of the number to be added to the front of the dialed number. | N/A
E.164 International Deletion Count | Number of digits to be deleted from the beginning of the incoming number. | 0
E.164 International Inserted Digits | Digits of the number to be added to the front of the incoming number. | N/A

Sub-parameter | Description | Recommended Value
Prefix | A combination digits that dial to originate a call. | 623157
TON Incoming Call | The original type of the incoming number. It is specified by originating node for terminating node to route this call with proper dialed number manipulation. | Unknown
Flag | Enable or disable this prefix. | Enable
Length of Dialed Number | The length of the dialed number. | 6
Call Type | Service type of the outgoing call. | Normal
Emergency Type | It's correlated with the index of emergency number selected in Location Area. | N/A
RSC | Routing Selection Code is a "route selection" index to select a trunk group in a routing zone pointing to the destination. | --
CDR Flag | Enable or disable the Call Detail Record generation of this prefix. | Enable
MNP Flag | Enable if this prefix relating to Mobile Number Portability service. | Disable
Premium Call Flag | Enable if this prefix relating to Premium Call service. | Disable
Call Allow Flag | Subscribers with OSB type 1 can only make calls to this dialing prefix with Call Allow Flag enabled. | Disable
Call Bar Flag | Subscribers with OSB type 2 can't make calls to this dialing prefix with Call Bar Flag enabled. | Disable
TON Outgoing Call | The transformed type of the incoming number, which will be routed to the associated trunk group. | Unknown
Out Trunk Deletion Count | Number of digits to be deleted from the beginning of the dialed number. | 0
Out Trunk Inserted Digits | Digits of the number to be added to the front of the dialed number. | N/A
E.164 International Deletion Count | Number of digits to be deleted from the beginning of the incoming number. | 0
E.164 International Inserted Digits | Digits of the number to be added to the front of the incoming number. | N/A

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