July 2003
NEC Business Solutions Ltd
372 – I7
ISDN-BRI Trunk Connections
Doc. No. 8
201 - Re
lease 1.0
July 2003
Use Memory Block 3-72 (ISDN BRT Connection Configuration) to
assign the BRT Interface as Point to Point or Point to Multipoint
(default: Point to Multipoint).
Use Memory Block 4-47 (ISDN Directory Number Selection) to specify
whether or not the directory number is presented to the network.
Use Memory Block 4-62 (ISDN DID Directory Number Assignment) to
specify per station the outgoing Caller ID Number to be presented.
Use Memory Block 7-1 (Card Interface Slot Assignment) to specify the
BRT(4)-U( ) ETU.
Restrictions
The ISDN-BRI interface provides a voice communication path only.
The System does not support Multipoint access.
General
Xen IPK Expanded
Eight BRT(4)-U( ) ETUs can be installed in a system.
Sixty-four ISDN trunks (B channels) can be assigned in a system.
The BRT(4)-U( ) ETU can be installed in any slot (1~8) of any
cabinet (1~3).
Xen IPK Basic
Two BRT(4)-U( ) ETUs can be installed in a system.
Sixteen ISDN trunks (B channels) can be assigned in a system.
The BRT(4)-U( ) ETU can be installed in any slot (1~8) of any
cabinet (1~3).
Common
ISDN Trunk DTMF Duration/Interdigit Selection is effective after
Answer Supervision is received from the CO.
When an ISDN line Layer 1 or Layer 2 down condition occurs, the
CO line key LED turns solid red, and the following message is
displayed on the first line of the LCD of the Multiline Terminals
connected to Port 01:
Layer 1 Down: COXX Layer1 DOWN
Layer 2 Down: COXX Layer2 DOWN
XX represents the CO Trunk number (01~64).
Layer 1 down display has a higher priority than Layer 2 down. This
error display disappears automatically when Layer 1/Layer 2 error is
recovered.
The Xen IPK system supports BRI ISDN lines conforming to the
ETSI standard.
The BRT(4)-U( ) ETU supports the T-interface, but not the U-
interface.
