Specifications

PSTN trunk.
4.8 ISDN PSTN Trunk Configuration
An ISDN PSTN trunk group is a logical group of one or more ISDN subscriber lines connecting to ISDN
ports (RJ45) on IP PBX. Currently only Basic Rate Interface (BRI) ISDN service is supported. BRI
consists of two 64 kb/s B channels and one 16 kb/s D channel for a total of 144 kb/s. This basic service
is intended to meet the needs of most individual users.
The ISDN PSTN TRUNK MANAGEMENT page allows the administrator to configure ISDN trunks.
Select Trunk -> ISDN PSTN Trunk, and one can add, edit and delete ISDN trunks. Go to Service -> IP
PBX Service, and click RELOAD to activate changes.
4.8.1 Add an ISDN PSTN Trunk
1. Click the Add New tab.
2. Enter settings shown in
Table 4.8.
3. Click ADD to see the newly added ISDN PSTN trunk in the Trunk Group.
The newly added ISDN Trunk shall display in the Trunk Group.
4.8.2 Edit an ISDN PSTN Trunk
1. Click the Trunks tab, and More to see more information.
2. Enter settings shown in
Table 4.8 in a row.
3. Click APPLY in the row to update the information.
4.8.3 Delete an ISDN PSTN Trunk
1. Click the Trunks tab, and select a trunk group.
2. Click DEL to remove the ISDN PSTN trunk from the Trunk Group.
Table 4.8 ISDN Trunk Configuration Settings
Field Description
Trunk Group ID number of this ISDN trunk group. A valid number ranges
from 1 to 31. It should not overlap with existing FXO PSTN
trunk groups.
40