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Call Waiting Caller ID
Calling Identity Delivery on Call Waiting (CIDCW) is a CLASS service that allows a customer, while off-hook on an existing call,
to receive information about a calling party on a waited call. The transmission of the calling information takes place almost
immediately after the customer is alerted to the new call so he/she can use this information to decide whether to take the new
call.
Function:
The telephone exchange transmits or receives CAS and ACK signals through each voice RX/TX route. Then FSK data and
MARK data pass the following route.
Telephone Line P101 C105, C104 R103, R102 IC501(23, 21).
If the unit deems that a telephone connected in parallel is in use, ACK is not returned even if CAS is received, and the
information for the second and subsequent callers is not displayed on the portable handset display.
Signal Flow
Telephone Exchange
Cordless phone
Signal Flow
Cordless phone
Telephone Exchange
IC501
All manuals and user guides at all-guides.com
Call Waiting Format
CAS: CPE Alerting Signal
Dual Tone of 2130 Hz, 2750 Hz
-15 dBm (900 ohm load)
CAS
80 5 ms
0~100 ms 60 5 ms
CIDOUT
Pin 24
CIDINn
Pin 23
CIDINp
Pin 21
LSRn
Pin 28
19
KX-PRL260/KX-PRL262/KX-PRD260/KX-PRD262/KX-PRLA20
Continuance Signal
of 1200 Hz (Data "1")
MARK
0~500 ms 58~75 ms
ACK: Acknowledged Signal
DTMF
"D"
ACK
R101
C103
R103
C105
R102
C104
C106
R104
"FSK"
DATA
about 300 ms
(be changed by
Information Volume)
L1T
L1R
P101
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