Microtel Series 1000 - Manual (Page 11)

MICROTEL Series 1000 Dialer
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reducing the time to alert authorized personnel of existing alarm conditions. If a call is
not answered, or the called number is busy, the dialer will abort the call and begin calling
the next number for that channel in its alarm’s calling list. Call progress decoding is also
useful for sensing pager terminal tones, or long distance service access prompts before
continuing a dialing sequence. It is even possible for one Series 1000 dialer to call
another dialer, gain access to it, and actuate outputs on that dialer. The call progress
features of the Series 1000, described in the Advanced Topics chapter, is also flexible
enough to traverse preset menus via touch-tone commands.
Will the Dialer Call Me Back? Each I/O channel has its own independent snooze
timer. When an alarm is acknowledged, the snooze timer for that individual channel is
started, and alarm calls for that channel are suspended. If a channel is still in alarm after
the snooze period ends, then the dialer will begin a new alarm dialing sequence (starting
with the first number on the specific channel’s calling list).
A channel can also be programmed to make calls when the status returns to normal
operation. If a channel's input state returns to normal during a snooze period, then the
balance of the snooze delay will be abandoned, and the dialer will begin making call-outs
beginning with the first telephone number on the associated call-outs list.
How does the Dialer Know Who to Call? The dialer has a System Telephone
Directory composed of up to 9 user-programmed telephone numbers. Each telephone
number in the System Telephone Directory can be up to 60 digits long. Special ‘*’
control sequences may be embedded within a user-programmed telephone number.
These include tone/pulse selection dialing, pauses, wait for tone, quiet, or voice, auto
acknowledgment of an alarm call-out, dial '*' or '#' for interfacing to telephone
equipment, turn on or off a dialer output during an alarm call, or specify that the number
corresponds to a FAX machine. These special sequences allow a tremendous amount of
flexibility on a telephone number by number basis.
How does the Dialer Prioritize its Calls? The dialer maintains an inherent
priority of the input modules: the system call-at is highest priority, followed by channel
#1, channel #2,...channel #8, and the power fail channel #9. Each telephone number in
the System Telephone Directory has its own Disable Timer. If a telephone number's
Disable Timer has a non-zero value, then that telephone number will not be called during
alarm call out sequences.
When the dialer detects a new alarm condition, it will search the new channel’s calling
list, beginning with the first number on the list, for the first telephone number with a
disable timer equal to zero. If the telephone number has the *991 FAX code embedded
in it, then the dialer will begin to generate a current alarm status report to FAX. The
dialer will then go off-hook and begin to dial the telephone number if the following
conditions are true:
A. The System Disable Timer = 0.
B. The Call Spacing Timer = 0, and the dialer has been on-hook for at least
the network recovery time (10 seconds). (See Chapter 3, Call Spacing Delay)