NEC NDA-24305 - page 75

NDA-24305 CHAPTER 5
Page 57
Revision 1.0
CALL WAITING-TERMINATING-PRI
C-114 CALL WAITING-TERMINATING-PRI
1. General Description
This feature enables a busy station to receive a second incoming call from DID trunk of ISDN network. A Call
Waiting Tone is sent to the busy station, the user can use CALL HOLD [C-3] to answer the second call. CALL
HOLD [C-3] may be used to alte rnate between the two calls.
2. Operating Procedure
To activate CALL WAITING-TERMINATING on an incoming ISDN trunk call:
1. The system receives the called station number.
2. If the called station is busy, CALL WAITING-TERMINATING is automatically set;
calling station receives Call Waiting Ringback Tone.
Call Waiting Tone (2 beeps) is sent to the busy station . If the called station is a D term LED of “ANSWER”
key flashes.
To answer a CALL WAITING-TERMINATING call:
1. Call Waiting Tone is heard during the call in progress.
2. Flashing the switchhook or pressing the “ANSWER” key on the Dterm will hold the existing call.
3. CALL WAITING-TERMINATING is automatically connected.
4. Another switchhook flash or pressing the “ANSWER” key on the Dterm will return to the original call and
hold the second call.
OR
1. Call Waiting Tone is heard during call in progress.
2. The called station hangs up; priority ringing is sent.
3. Lift the handset to answer.
3. Programming
STEP 1: Assign the Basic Dat a for ISDN. (Refer to Chapter 3, “Basic Data Assignment for ISDN”.)
STEP 2: ASYD - System Data 2 Index 10, bit 6: Call Waiting-Terminating Service 0/1=Out/In Service.
STEP 3: ASFC - Assign SFI6=1 (Call Waiting-Terminating Service is allowed.). Also SFI11=1 (Data Line
Security is OFF.).
STEP 4: ARTD - For DID Trunk (Bch) of ISDN, assign CDN46 (CW)=1.
Priority ringing = 0.4 sec. ON 0.2 sec. OFF 0.8 sec. ON
0.2 sec. OFF 0.4 sec. ON 0.4 sec. OFF