[comp.dcom.telecom] Caller ID and Call Waiting

riddle@hoss.unl.edu (Michael H. Riddle) (01/04/91)

>From comp.modems, with obvious applicability to comp.dcom.telecom:

QUOTED TEXT FOLLOWS:

There's been a lot of talk about Caller ID in [comp.modems] lately, so
I thought I would add a Caller ID question, only indirectly related to
modems.

What happens if you have Call Waiting and Caller ID, and a call comes
in while your connected elsewhere? I presume what happens is you just
don't get any caller id info on the waiting call, whether or not you
accept it. My understanding is that the caller id info is part of the
ring signal, and if it doesn't ring you don't get the info.

The reason this is partly related to modems is my pet peeve with TB
modems in PEP mode. PEP mode generally retrains around the call
waiting beep, without ever letting you know about it.  This is what
many people want, but not what I want. I would rather drop the data
call and get the incoming call. If Caller ID worked with Call Waiting,
I could rig something up.


Originally posted in comp.modems by:

Ken Mandelberg      | km@mathcs.emory.edu          PREFERRED
Emory University    | {rutgers,gatech}!emory!km    UUCP 
Dept of Math and CS | km@emory.bitnet              NON-DOMAIN BITNET  
Atlanta, GA 30322   | Phone: (404) 727-7963


[Moderator's Note: I've wondered about this myself. How does the
Caller IB box get anything to dislay when the calls comes in via
call-waiting? If you hang up and let the new call actually ring in,
does the information pass at that time, or not?  Likewise, when your
phone is forwarded, we all know there is a single ring to remind you
of the forwarding, but you cannot actually receive the call no matter
how fast you pick up the receiver. Is the Caller ID sent to you on
those calls, or not?    PAT]

dave@westmark.westmark.com (Dave Levenson) (01/07/91)

In article <15797@accuvax.nwu.edu>, riddle@hoss.unl.edu (Michael H.
Riddle) writes:

> What happens if you have Call Waiting and Caller ID, and a call comes
> in while your connected elsewhere?

> [Moderator's Note: I've wondered about this myself. How does the
> Caller IB box get anything to dislay when the calls comes in via
> call-waiting? If you hang up and let the new call actually ring in,
> does the information pass at that time, or not?  Likewise, when your
> phone is forwarded, we all know there is a single ring to remind you
> of the forwarding, but you cannot actually receive the call no matter
> how fast you pick up the receiver. Is the Caller ID sent to you on
> those calls, or not?    PAT]

I can answer two of the three questions raised here:

1. No Caller*Id information is presented on a non-ringing call, such
as one that arrives via call waiting.

2. No Caller*ID information is presented with the 'single-spurt' ring
that announces a forwarded call.

I don't yet know the answer to the remaining question, about the
call-waiting call that is subsequently allowed to ring after the
previous call in progress is disconnected.


Dave Levenson		Internet: dave@westmark.com
Westmark, Inc.		UUCP: {uunet | rutgers | att}!westmark!dave
Warren, NJ, USA		AT&T Mail: !westmark!dave
Voice: 908 647 0900     Fax: 908 647 6857

Michael_Perka@next.com (01/07/91)

In article <15797@accuvax.nwu.edu> the Moderator writes:

>[Moderator's Note: I've wondered about this myself. How does the
>Caller IB box get anything to dislay when the calls comes in via
>call-waiting? If you hang up and let the new call actually ring in,
>does the information pass at that time, or not?  Likewise, when your
>phone is forwarded, we all know there is a single ring to remind you
>of the forwarding, but you cannot actually receive the call no matter
>how fast you pick up the receiver. Is the Caller ID sent to you on
>those calls, or not?    PAT]

The interactions of the Calling Number Delivery (CND) CLASS service
with other services such as Custom Calling are noted in the Bellcore
Technical Reference TR-TSY-000031, "CLASS Feature: Calling Number
Delivery".

Under section 3.8, Interactions:

"A. Call Waiting

CND data should not be transmitted duing of after a Call Waiting
(CW) tone.  Similarly, CND data should not be transmitted during
or after any switchhook flashes that may occur in response to the
CW tone.  Also, CND should not occur during ringback that results
 from the customer going on-hook in response to a CW tone."

Subsections B through J describe interactions with Multiparty Lines,
Three-Way Calling, various types of call forwarding, Distinctive
Ringing, Auto Callback/Recall, and Calling Number Delivery Blocking.

Ordering info for this TR has already appeared in TELECOM Digest.


Mike