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NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 185
NI-1 BRI Terminal Support N-39
N-39 NI-1 BRI Terminal Support
General Description
This feature supports the Bellcore BRI protocol, National ISDN-1 for connection of Voice and Data circuit switched
terminals.
The PBX may send Endpoint Identifier (EPID) to the terminals by receiving their Service Profile Identification
(SPID) and provide supplementary service (CALL TRANSFER) by Feature Identifier (FID) assigned on each
terminal. The National ISDN-1 Hold feature is also supported.
The PBX enables the N-ISDN1 terminal to display a calling number upon call termination by delivering a SETUP
message with the information element of Display Text.
The N-ISDN1 terminal may also display Call Hold or Call Transfer service when it is activated.
Operating Procedure
SPID and FID are assigned according to the N-ISDN1 terminals.
Service Conditions
1. The SPID is assigned in each terminal (A telephone number + 00 is preferred.). An SPID number of 20
digits or the less may be assigned.
2. The EPID the PBX sends to a terminal is in response to the SPID received from the terminal. The User
Service Identifier (USID) in EPID is a value using first 2 digits of SPID, and Terminal Identifier (TID) in
EPID is the value using last 2 digits of SPID. However, if the last 2 digits of SPID is 63 or higher, TID is
62. When SPID is 1 digit, USID is the first digit plus 0. SPID and TID is the value using SPID.
3. Since Electronic Key Telephone Service (EKTS) is not supported, USID which is included in EPID upon
sending a SETUP message to a terminal, is fixed 127 and TID is omitted.
4. The maximum number of patterns for FID is 31 (from 1 to 31), allowing the many different terminal types
using different FID fixed values.
5. FID ranges from 1 to 127.
6. An FID pattern is assigned for the number of the station using the B1-channel (even Level). Since the B2-
channel is controlled according to the FID pattern assigned to the B1-channel, assignment to the B2-
channel is not needed. Therefore if station data of the N-ISDN1 terminal is assigned only to the B2-
channel, this service is not activated.
7. Display Text on the SETUP message, which is delivered to the N-ISDN1 terminal from the PBX, is the
same as the calling party number.
8. The disconnection (DISC) message including Display Text to clear the display is delivered when a call is
disconnected from the PBX.