ZETRON 748, Technical Manual

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Operation
025-9368H 41
Hook Flash
The Model 748 can support the mobile in performing a hook flash on the phone line once in the
conversation mode. One of the more typical installations where hook flash is used is on PBX
installations. This is enabled on a per user basis. On PSTN calls a user’s
Toll restrict type must be
set to “None” for access to Hook flash. On PBX internal calls, a user’s Toll restrict type can be set to
anything except “AutoD” for access to Hook flash. It is initiated by the mobile entering a DTMF
“*0” while in conversation mode. The Model 748 will then “break” or “flash” the line for 90
milliseconds. What happens next is based on whether the call is an internal PBX call or a PSTN call.
On PSTN calls the Model 748 will temporarily enable DTMF regeneration. While in temporary
regenerate, all digits decoded from the mobile will be regenerated (0-9,A-D,#). Once a hook flash
has been performed, the mobile has 2 times the programmed
DTMF interdigit time to dial the first
digit. This is used to stay in regeneration. After the first digit, the specified DTMF interdigit time is
used as the maximum interdigit time. Allowing the interdigit time to expire or a DTMF “*” will turn
off the regeneration at any time. If disconnect on second dial tone is enabled (default), the Model
748 will ignore dial tone from the phone line after a hook flash.
On internal PBX calls only a hook flash is performed and the Model 748 returns to conversation
mode. Since all DTMF is passed though from the mobile, there is no need to stay in regeneration.
Interconnect Hog Mode
Occasionally some customers will make back to back calls once they gain access (place a call then
place another call upon completion of the first). This prevents anyone else from using the
interconnect for several minutes, and in effect defeats the call limit timers. When enabled for these
users, the
Interconnect Hog mode can help equalize access for all customers on the system. The last
user who signed on to the interconnect is restricted from using it for the Interconnect Hog time . This
allows another user to gain access to the interconnect and prevents the back to back type calls. This
is can be enabled/disable on a per user basis.
Call Alert Beeps
This feature allows mobiles currently involved in a mobile to mobile call to know that the telco line
is ringing. When enabled, the Model 748 will send a tone over the channel for each incoming ring
detected. The mobile then has a chance to terminate the call in progress and allow the ringing line to
be answered.
Autodials
The Model 748 provides a large (99 number) autodial table. Each autodial can be up to 16 characters
long. Valid digits that will be dialed are “0 - 9, *, #”. The “,” character will insert a delay (2.5
seconds default) in the dialing string. Text can be included in the string. Some examples of this are
“1(256) 880-663” = “1256880663” and “880-663 ZETRON”.
Individual users (radios) can have access to all 99, 10, or 1 based on the setting of Autodial mode .
This is a two digit number. The first number indicates which block of 10 autodials that user (radio)
has access to. The second number indicates which autodial(s) in that block of 10 that user (radio) has
access to. If
Autodial mode = 00, then *01 - *99 will access any autodial programmed in the table.