NEC Xen IPK Features & Specifications Manual page 390

July 2003
380 – I8
Xen IPK Restrictions
Two PRT(1)-U( ) ETUs can be installed in a system.
Up to 60 ISDN trunks (B Channels) can be assigned in a system.
The PRT(1)-U( ) ETU can be installed in any slot (1-8) in any cabinet
(1-3), except when more than 24 channels are assigned in which case
a free slot is required to be left to the right of the slot containing the
PRT card.
General
Each PRT(1)-U( ) ETU supports the connection of one Primary Rate
ISDN line, complying to the European ETSI standard (Australian
standard ACA TS038).
Memory Block 1-1-80 (ISDN 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 red LED is On, and the following error message is displayed
on the first line of the LCD of Multiline Terminals connected to port 1:
Layer 1 Down: COxx Layer1 DOWN
Layer 2 Down: COxx Layer2 DOWN
xx is the CO Trunk Number (01~64)
Layer 1 has a higher priority than Layer 2. This display disappears
automatically when the error is recovered.
For the Australian Network only, Malicious Call Trace is possible on
MLT. This service can only operate when the class of service is
assigned and is subscribed with the Telstra Network.
The subscription to Malicious Call Trace (MCT) is per interface. That
is, to have MCT for more than one PRT(1)-U( ) in a system, all are
required to be subscribed.
PRI firmware version 2.12 or higher, access to network supplementary
services is possible via the stimulus (Keypad) mode of operation
The CLKG-U( ) Unit must be fitted onto the CPUI-U( ) ETU when the
PRT(1)-U( ) ETU is installed. The clock unit is a Phase Locked
Oscillator which automatically synchronises the Xen IPK system with
the ISDN Network. If a BRT(4)-( ) ETU is also installed in the system,
the synchronisation can be provided from either interface. Switch SW1
on the CLKG-U( ) Unit must be set to the ISDN-PHS setting.
The PRT(1)-U( ) ETU supports DTMF signalling during the
conversation phase of the call.
NEC Business Solutions Ltd
ISDN-PRI Trunk Connections