Specifications

Call Forward Outside System
The Call Forward Outside System (CFOS) feature allows the system to forward
incoming or transferred line calls to telephone numbers outside the system. The CFOS
feature forwards calls over any available outbound lines or line groups. Since CFOS
involves outbound calls, those calls are subject to all line access, toll restriction, and
specialized route access restrictions normally imposed on the users. Any calls that CFOS
can not service (no outbound line available, toll restricted, and so forth), ring the system
as normal calls. The CFOS feature is useful for after-hours forwarding of business calls
to alternate sites such as a home or cellular telephone. To help system managers keep
account of CFOS activity, the system marks CFOS calls with an F in the SMDA records
printout.
Users activate or deactivate CFOS by dialing a feature code or pressing a preprogrammed
button. Once users activate CFOS, they select the outbound line or line group in any of
the normal line selections methods available to them. They also designate the forward
destination by dialing the number or pressing a speed dial button. (If users do not make a
line and destination choice, the system uses the most recently used selections.) Once a
user activates CFOS, it remains active and neither system resets nor power outages will
deactivate it. After activation, incoming or transferred calls to an idle CFOS-enabled
station forward outside the system to the CFOS destination over the selected outbound
line or line group.
CFOS remains in effect in the event of loss of power or a system reset. Lines used for
CFOS must have their abandon hold release time set to match the central office. Because
CFOS is a powerful feature with the potential for abuse, several safety features have been
added. Programming safeguards include the ability to enable the feature only on selected
stations and master control ability for enabling and disabling the feature system-wide.
Ultimate responsibility for system integrity, however, lies with the system administrator.
Comdial has taken reasonable steps in the design of all product features, including CFOS,
which protect against unauthorized or fraudulent access to, or use of, a system, or which
protect against unauthorized, fraudulent or unaccounted-for access to, or use of, long
distance lines. However, no system is entirely invulnerable or immune from unauthorized
or fraudulent access or use, or unaccounted-for access or use, and therefore Comdial
disclaims any and all liability, and makes no warranty, express or implied, relating to
unauthorized or fraudulent access or use, or unaccounted-for access or use.
NOTES: (1) CFOS will not work unless the abandon hold release time on all lines used
for CFOS matches the C.O. abandon hold release time.
(2) Calls forwarded through CFOS may experience lower audio levels due to
the normal line resistance of C.O. lines. Low audio level is usually only
noticeable on long line loops. If signal loss is a problem at a particular site, the
installer may need to add a line amplifier (repeater) in the lines.
TAB001–page23
DSU II Digital Telephone System IMI66–132
Digital Telephone System Features A – 12A