Section 10.30.2.1.1. Configuration

10.30.2.1.1. Configuration

MSN on UP0/E port

Precondition: UP0/E port with secondary subscriber number and at least one functional terminal linked to the main subscriber number, e.g.

Main subscr. no. 4711:	CORNET-TS (Voice terminal),	FUNCT-FAX,	FUNCT-DEE
Secondary sub. no 4712:	CORNET-TS (Voice terminal),

Assigning secondary MSN number 4712:

AD-SBCSU:STNO=4712,OPTIDX=MSN,MAINO=4711;

Result:

	Main subscr. no. 4711:	CORNET-TS (Voice terminal),	FUNKT-FAX,	FUNKT-DEE
MSN	Secondary sub. no 4712:	CORNET-TS (Voice terminal),	MSN-FAX,	MSN-DEE

The secondary MSN number 4712 occupies 1 TSI for the CorNet-TS terminal and one for all "MSN devices", regardless of how many services can actually be reached. Other secondary MSN numbers can no longer be configured. However, additional MSN subscriber numbers can be configured.

IMPORTANT:

Secondary MSN numbers are always READY and cannot be configured by dependability (DEP) or by AMO DSSU. The scope of MSN services is always the same as the services provided by the functional terminals linked to the main subcriber number (in this case fax and videotex) and cannot be limited to specific services (e.g. fax only). The scope of MSN services is expanded automatically (with each secondary MSN number on the bus) when new functional terminals are added to the main subscriber number (AD-SBCSU: OPTIDX=SVC,..;) ! The scope of MSN services is reduced automatically (with each secondary MSN number on the bus) when functional terminals are deleted at the main subscriber number (DEL-SBCSU:SVC=<VTX/DTE/FAX/TTX, ...;) !

Assigning an MSN Number (MBUS)

Precondition: Free subscriber number (defined as DAR=STN in AMO WABE) and MBUS with at least one functional terminal linked to the main subscriber number, e.g.

	Main subscr. no. 4711	CORNET-TS (Voice terminal),	FUNCT-FAX,	FUNCT-DEE
MSN	Secondary sub. no. 4712	CORNET-TS (Voice terminal),	MSN-FAX,	MSN-DEE
	Secondary sub. no. 4713		MSN-FAX	MSN-DEE

Assigning MSN number 4999:

AD-SBCSU:STNO=4999,OPTIDX=MSN,MAINO=4711;

Result:

	Main subscr. no. 4711	CORNET-TS (Voice terminal),	FUNKT-FAX,	FUNKT-DEE
MSN	Secondary sub. no. 4712	CORNET-TS (Voice terminal),	MSN-FAX,	MSN-DEE
MSN	Secondary sub. no. 4713		MSN-FAX	MSN-DEE

IMPORTANT:

MSN numbers are alway READY and cannot be configured by dependability (DEP) or by AMO DSSU. The scope of MSN services is always the same as the services provided by the terminals linked to the main subscriber number (in this case fax and videotex) and cannot be limited to specific services (e.g. fax only). The scope of services is expanded automatically (with each MSN number on the bus) when functional terminals are deleted at the main subscriber number (AD-SBCSU:OPTIDX=SVC, ...;) ! The scope of MSN services is reduced automatically (with each MSN number on the bus) when functional terminals are deleted at the main subscriber number (DEL-SBCSU:SVC=<VTX/DTE/FAX/TTX>, ...;) !

Assigning an MSN Number (FBUS)

Precondition: Free subscriber number (defined as DAR=STN in AMO WABE) and FBUS with at least one functional terminal linked to the main subscriber number, e.g.

Main subscr. no. 5711:

FUNCT-Voice,

FUNCT-FAX,

FUNCT-DEE

Assigning MSN number 5999:

AD-SBCSU:STNO=5999,OPTIDX=MSN,MAINO=5711;

Result:

	Main subscr. no. 5711:	FUNCT-Voice,	FUNCT-FAX,	FUNCT-DEE
MSN	MSN no. 5999:	MSN-Voice,	MSN-FAX,	MSN-DEE

IMPORTANT:

The informamtion contained in the section "Assigning an MSN number (MBUS)" applies accordingly.

Setting MSN Authorization
The MSN authorization must be set in the associated COS for the main subscriber number on the bus, depending on the services involved.
```
CHA-COSSU:TYPE=COS,COS=<number>,AVCE=MSN,AFAX=MSN,AVTX=MSN, 
ADTE=MSN; 
```
or in the MBUS examples
```
CHA-COSSU:TYPE=COS,COS=<number>,AFAX=MSN,AVTX=MSN; 
```
This class of service has two major effects:
1. A CP bit which has been set according to the service (this normally preven two funcional bus terminals of the same service being in the call state simultaneously) is disregarded, so that the main subscriber number and the MSN number can be accessed parallel to each other (even without the MSN number on the bus it is possible to ensure, by means of a set MSN class of service, that of two functional voice devices, both set to the main subscriber number, the second can be accessed with the main subscriber number if the first is busy).
  - On an incoming call, the (MSN) number is sent as "Called Party No" to the bus, where each functional terminal itself checks, on the basis of the programmed number(s), whether it has to answer (in the 1TR6 protocol this is the equivalent of the TSI).
  IMPORTANT:
  
  It is advisable to set the MSN authorization for all services and not just for those which are actually available - this saves repeated adaptation if the main subscriber number is subsequently expanded with the addition of other (functional) services and has no negative effects (apart from those referred to above) if there is in fact no "MSN device" for a particular service.
Programming terminal to MSN number
Functional terminals already connected to the bus can also be programmed to the MSN number. In addition, further terminals belonging to the same service can be connected to the bus and programmed to the new MSN number.

IMPORTANT:

In the case of terminals connected to the bus with the 1TR6 protocol only a single-digit terminal selection identifier (TSI) can be programmed, with the result that MSN numbers can only be differentiated on the basis of the final digit. It is therefore important for all MSN numbers used on the bus to have different final digits.

${DocTitle}, ID: ${DocID}

© 03/2026 Mitel Networks Corporation. All rights reserved. Mitel and the Mitel logo are trademark(s) of Mitel Networks Corporation. Unify and associated marks are trademarks of Unify Software and Solutions GmbH & Co. KG. All other trademarks herein are the property of their respective owners.