User manual
TANDBERG 1500 MXP 
172 
Advanced ISDN Settings 
Sub address 
Using a sub address enables you to connect up to eight ISDN terminals to the same ISDN 
telephone number and line. The terminals are addressed by using different sub addresses. To 
call a terminal with a sub address, separate the ISDN telephone number and the sub address 
with a ‘*’. Note that this service has limited access on some ISDN networks. 
Example: 12345678*2 (up to four digit sub addresses are possible). 
Validate Numbers / MSN (Multiple Subscriber Number) 
The use of MSN (Multiple Subscriber Number) enables you to attach different ISDN terminals, 
with different numbers, to the same physical ISDN telephone line. If Validate Numbers is set to 
On only calls to those numbers specified in the Line Setup menus will be answered. This service 
can be ordered from your telephone company. 
Parallel dial 
On 
Channels will be dialed and connected in parallel when setting up a BONDING call. 
Off  Channels will be dialed one by one, which may increase the dialing time. 
Send Own Numbers 
On 
The system will send its own numbers to the far end. 
Off 
The system will not send its own numbers to the far end, but please note that the 
network may still send your numbers to the far end. 
Sending Complete 
On 
The system will send the ISDN message information element Sending Complete. 
Off 
The system will not send Sending Complete. 










