User`s guide

1(1)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
97-10-31 C
441/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
SEA/TB/MP T.Preißner
SEA/TB/MP ASB 150 02
SEA/TB/XE
REFER BACK
Definition
The possibility to switch back and forth between two or
more call partners for an unlimited number of times.
Use
Enables an extension user to maintain contact with
several call partners by switching simply from one to
the other.
The call partners can be both internal and/or external.
Operation
System Telephones
Refer back is preceded by inquiry.
Refer back cannot be initiated until the inquiree
(person to whom inquiry is made) answers.
The relevant lamps on the telephone of the extension
who undertakes parking flash slowly for those keys on
which calls are parked.
Refer back is executed by pressing the key for the
desired call partner.
The parked party is connected and the previously
connected party will automatically be parked
individually.
The user can now choose to recaccess any of the
parties that are parked on her/his telephone.
Analogue telephones
Refer back is preceded by inquiry.
Refer back is not possible until the inquiree answers.
Refer back is initiated by pressing the R-button (on
analogue telephones without R-button by dialling one
pulse (digit) on the rotary dial).
The extension user receives dial tone and can now
choose one of the following alternatives:
Digit 1 = Reaccess parked party.
Connected party is disconnected
Digit 2 = Refer back to parked party.
Connected party remains
Digit 3 = Three party call is initiated.
Parked party is connected to call.
See also CONFERENCE,
document 154/155 34-ASB 150 02 Uen.
If no digit is dialled within 3 seconds, dial tone will
cease and refer back to the parked party ensues auto-
matically.
The previously connected party will be parked
automatically.
If digit 2 is dialled or if timeout takes place the refer-
back procedure can be repeated an unlimited number
of times provided the parked party does not go on
hook.
Capacity
The number of ongoing calls on System Telephones is
limited only by the number of traffic function keys.
Analogue telephones can only switch between two call
partners.
Limitations
For refer back to be possible, an internal call must
have been answered and the called party must remain
on the line.
For external calls where no answer indication is
obtained for outgoing calls "end of selection", that is
digit transmission, must have been completed.
Programming
None.
Equipment
None.
441.fm
Database reference