DK40 Universal Slot PCBs
RBSU/RBSS ISDN Basic Rate Interface Unit
3-60
Strata DK40 I&M Manual Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
RBSU/RBSS Passive Bus Configurations
The NT function has been designed to conform to the ETSI ISDN standards. It is designed to
operate only in “Point-to-Multipoint” mode and will support ISDN terminal equipment that is
of the Automatic TEI type.
Bearer Service Handling
For any internal call, generated by an ISDN TE, the NT function will only accept a Bearer
Service request for Speech or 3.1kHz if the destination point is a Digital or Electronic Key
Telephone, or a standard telephone/device. If the destination port is another NT port or an
outgoing call the requested Bearer Service will be transparently passed through and it is the
responsibility of the terminating ISDN TE to accept or reject the call.
Supplementary Services
The following supplementary services are supported:
◆ CLIP - Calling Line Presentation
◆ COLP - Connected Line Presentation
◆ DDI - Direct Dialling In
◆ SUB - Sub Addressing sending and receiving
Note
If the DK40 system receives Sub-Address information it is transparently passed onto
the NT type ports or ignored if the call destination is a Digital or Electronic Key
Telephone, or a standard telephone/device.
RBSU/RBSS BRI Call Monitor
The call-monitor jack located on the RBSU enables you to use a PC or ASCII terminal to
monitor the BRI, D-channel call setup, layer-2 and layer-3 data (refer to Figure 3-20 on Page
3-39 for information about connecting the monitor jack). Figures 3-33 and 3-34 provide
examples of BRI call setup message information that is available from the RBSU call-
monitor jack.
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