NEC NDA-24311 Answering Machine User Manual


 
NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 97
Nailed-Down Connection - PRI N-31
N-31 Nailed-Down Connection - PRI
General Description
This service feature provides the logical equivalence of a hardware connection between ISDN trunk and a station/
trunk. A NAILED DOWN CONNECTION is constantly maintained in the system’s software. NAILED DOWN
CONNECTION data is programmed via the Maintenance Administration Terminal (MAT).
Operating Procedure
No manual operation is required.
Service Conditions
1. The following connections are supported by this service:
ISDN trunk ISDN trunk
ISDN trunk CCIS trunk
ISDN trunk Non-ISDN trunk
2. When a call terminates to B channel of an ISDN trunk engaged in NAILED DOWN CONNECTION, that
B channel is treated as busy.
3. When establishing NAILED DOWN CONNECTION, the target station/ trunk needs to be idle.
4. When NAILED DOWN CONNECTION is assigned to a station/trunk already engaged in a call, NAILED
DOWN CONNECTION is established after the call in progress is forcibly disconnected. In this case,
RESTART message is sent to the called office.
5. If the system/package is reinitialized while NAILED DOWN CONNECTION is established, NAILED
DOWN CONNECTION is reestablished after system/package reinitialization.
6. NAILED DOWN CONNECTION cannot be established for the following types of hardware:
Attendant Console
Register/sender trunk
Conference trunk for THREE-WAY CALLING [T-2]
AMP pool trunk
7. The following services supersede NAILED DOWN CONNECTION - PRI service. Therefore, the stations
engaged in NAILED DOWN CONNECTION should be restricted from these services.
CALL FORWARDING - ALL CALLS [C-5]
PRIVACY RELEASE [P-18]
STATION HUNTING - CIRCULAR [S-7]
STATION HUNTING - SECRETARIAL [S-8]
STATION HUNTING - TERMINAL [S-9]
Services to be activated when the station is busy