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CHAPTER 6 NDA-24305
Page 240
Revision 1.0
CALL COMPLETION ON NO REPLY (CCNR)
C-152 CALL COMPLETION ON NO REPLY (CCNR)
1. General Description
This feature allows a calling station to set Inter-Office Call Back when the called station does not answer. This
feature conforms to ETS 300 366. CCNR conforming to IS-13870 is available since Series 7400 software.
2. Operating Procedure
To set CCNR:
1. Station A places a call to Station B and receives Ring Back Tone; Station B does not answer.
2. While hearing Ring Back Tone, Station A presses the switchhook flash button and dials the access code or
presses the feature key for setting CCNR; Station A receives Service Set Tone.
3. Station A goes on-hook and waits for call back from Station B. Station B lifts the handset and handles
another call.
4. Station B goes on-hook; Station A rings.
5. Station A answers; Station B is automatically recalled.
6. Station B answers; Station A and Station B are connected.
To cancel CCNR:
1. Station A lifts the handset while the CCNR service is set; Station A hears Dial Tone.
2. Station A dials the access code or presses the function key for canceling CCNR; Station A hears Service Set
Tone.
3. Station A replaces the handset.
Note:
Operating procedure varies depending on the specifications of the station since ETS 300 306/IS-13870
protocol does not regulate.
3. Service Conditions
1. CCNR is available when an end-to-end link is established via Q-SIG interface (ETS 300 172).
2. The transfer rate is 64 kbps. Bearer Capabilities are as follows:
•Speech
• 3.1 kHz audio
• 7 kHz audio
3. Multiple CCNR features cannot be set for a single station.
4. CCNR is available for the D
term
or an analog station (i.e. not available for Attendant Console or ISDN
terminal).
5. When the called station becomes idle while the calling station is in conversation, the calling station is
recalled after the conversation ends.