BusinessPhone Communication Platform 5.1
Facilities

## Mobile Extension

General
Operation
Technical Realization
PBX-internal
Network provider
Programming
”Mobile” Extension: common settings
”Mobile” Extension: country specific settings
Traffic matrix
Fictive number
CTI automated attendant
BusinessLink
Limitations & Capacity
Equipment

## General

A mobile subscriber, be it 2G, 2.5G or 3G or any standard GSM, GPRS, D-AMPS, UMTS, can be used like an extension in BusinessPhone.

The traffic to, as well as from, the mobile user passes through the BP. While passing the BP, the system will be able to link services to the calls. Users of the Mobile Extension are defined in the BP as other standard extensions. This means that the mobile user will have access to the corporate network. The mobile user will also be able to use services such as short number dialing, camp-on, intrusion, call back, etc.

## Operation

See Facility Description - General (15534‑ASB 150 02 Uen)

## Technical Realization

Mobile Extension is realized with additional Hardware. 2 BackStage 4.0 installations, a CTI automated attendant and the traffic matrix provide security.

### PBX-internal

By piggy backing the BTU-A to the ELU-A (hardware loop) any calls directed to the BTU-A trunk behave like being done from the ELU-A. The ELU-A extension acts here as Mobile Extension. If the Mobile Extension wants to make a call, the Mobile Extension has to dial first (can be done automatically by a calling card) the access point, which is represented by fictive number A.The needed security is provided with the Routing function of BackStage A.

#### BackStage A

BackStage A is set-up on a dedicated PC to monitor Fictive Number A. The Fictive Number A is the access point for the Mobile Extension. Calls are only routed through to the BTU-A trunk if the right A-number is received. If no A-number or a wrong A-number is received, the call is routed to CTI automated attendant. Example of a routing table (one row per Mobile extension):

A-number = GSM number | Routing target
066412345678 | *716
066412345566 | *717
066412347788 | *718

Note

If the operation system of BackStage 4.0 is NT/2000/XP then the start has to be performed with client.exe local.

#### CTI automated attendant

The exit position of the CTI automated attendant is Fictive number B.

#### Backstage B

BackStage B is set-up on a dedicated PC (same PC where BackStage A is installed) to monitor Fictive Number B.The CTI AA directory number must be set in the Busy lamp field. Example of a routing table (one row per Mobile extension):

GSM number + Pin code | Routing target
0664123456781111 | *716
0664123455662222 | *717
0664123477883333 | *718

Note

If the operation system of BackStage 4.0 is NT/2000/XP then the start has to be performed with client.exe local.

#### The analogue extension (= mobile extension)

The analogue extension can act either as

- stand alone extension or
- a member of a Master-Slave unit

In order to route calls towards the Mobile Extension automatically the answering position of the analogue trunk has to be a short number pointing to the external number.

### Network provider

In order to save costs it is recommended to negotiate a flat rate or decreased rate contract with the GSM network provider, that all calls from the telephone done to the access point and from BusinessPhone to GSM phone are at a cheap rate. If necessary use Least Cost Routing (321/155 34-ASB 150 02 Uen)

## Programming

General start up

1. After cold start execute the country specific Tone/Transmission/Extension session e.g. AUT___05.sez for Austria has to be used.
2. Then execute the country specific Trunk session depending on the line length e.g. AUT_S_05.sez for Austria short line length has to be used.

### ”Mobile” Extension: common settings

Settings for the analogue extension (ELU‑A) that is looped back to the analogue trunk (BTU‑A).

Command | Value
0119 |  |
| shorter than Diversion time on no answer of GSM phone
0120 |  |
| shorter than Diversion time on no answer of GSM phone
0143 |  |
| 20 * 50 milli seconds
0162 |  |
| Mobile Extension
5605 |  |
| beginning with * or # in order to prevent DDI
1013 |  |
| yes
1024 |  |
| no
1025 |  |
| no
1101 |  |
| ABB number to GSM phone (including route access)
1102 |  |
| ABB number to GSM phone (including route access)
1201 |  |
| 20 if a BTU-A is used
1301 |  |
| 3
1302 |  |
| 3
1307 |  |
| yes
1308 |  |
| yes
1309 |  |
| yes
1419 |  |
| 6

### ”Mobile” Extension: country specific settings

Settings for the analogue extension (ELU‑A) that is looped back to the analogue trunk (BTU‑A). The values depend on the country (group).

Command | group 1 | group 2 | group 3
0140 |  |
| 0 | 0 | 0
0141 |  |
| -7 | -7 | -5
0142 |  |
| 0 | 0 | 0
1610 |  |
| 0 | 2 | 2
1611 |  |
| -7 | -9 | -9
1612 |  |
| 4 | 4 | 4

group 1: Standard, Denmark, Australia, UK, Germany, New Zealand, Singapore, China, South Africa, Netherlands, Yugoslavia.

group 2: Austria, Finland, Italy, Belgium, Sweden, Spain, Portugal, Brazil, Czech, Switzerland.

group 3: Norway

### Traffic matrix

To avoid misuse, the traffic matrix has to be programmed in a way, that no extension and no analogue trunk (PTT lines and tie lines) can reach the looped back trunk. For details please refer to document Traffic group matrix (484/155 34-ASB 150 02 Uen)

### Fictive number

For details please refer to document Fictive Number (201/155 34-ASB 150 02 Uen)

5409 |  | Create a fictive directory number series

### CTI automated attendant

For details please refer to document Computer Telephony Integration Groups (153/155 34-ASB 150 02 Uen)

4426 |  | voice announcements (example)

- reference 01: ’AUTHORITY CHECK’
- reference 02: ’PLEASE ENTER YOUR GSM PHONE NUMBER AND YOUR PINCODE’
- reference 03: ’WRONG ENTRY.PLEASE TRY AGAIN’

#### BusinessPhone commands for CTI automated attendant

Command | Comments | Value
5428 |  |
| Create Group | 1200
8730 |  |
| Greeting anno. reference | 01
8731 |  |
| Instructions anno. reference | 02
8732 |  |
| Error anno. reference | 03
8733 |  |
| Exit position dir.no | 1150

Note

8733: Exit position dir. no. (1150 - fictive number - controlled by BackStage B)

### BusinessLink

For details please refer to document Computer Telephony Integration (CTI) (152/155 34-ASB 150 02 Uen)

Command | Comments | Value
6009 |  |
| Baud rate | 19200
8902 |  |
| CTI route timeout | 01

Note

8902: CTI route timeout = 1 second to make rerouting fast

## Limitations & Capacity

The major limitation factor is the amount of PCM channels available in the system. As the access to the Mobile extension uses twice as much resources, the maximum number of Mobile Extensions making calls simultaneously is limited to theoretical 30. However, the total number of Mobile Extensions is only limited via the available hardware (ELU-A, BTU-A). So the typical number of mobile extensions is limited to 48. Basically the mobile extension acts like an analogue DTMF telephone, but without the possibility of inquiry and all features, that depend on inquiry. For details please refer to: Facility Description - General (15534‑ASB 150 02 Uen)

## Equipment

- ASB 150 02 SW LZY 203 2233 R2A or higher
- one analogue extension individual (ELU-A or MFU) and one analogue trunk individual (BTU-A) per mobile extension
- CTI - FECU
- BusinessLink 2.1 or higher
- BackStage 4.0 with 5 user licence - minimum
- BMS 2.01 or higher

Revision: PC3 © Ericsson Enterprise 2003