Mitel SX-200 Practices page 223

Features
CENTREx"I Compatibility (Flash Over Trunk)
Description
This feature provides the ability to send a switch-hook flash out over a
trunk. Flashing over a trunk allows for the use of CENTREXfeatures by
telephones within the PBX. Callers must follow instructions specified by
the local central office concerning which access codes to dial, and when
to wait for dial tone. After sending the flash over the trunk, the system will
wait for dial tone from the central office, or for the Limited Wait For Dial
Tone timer.
Speed Call
The access code for Flash Over Trunk, followed by digits which activate
CENTRU(features may be programmed into a speedcall key, or a system
abbreviated dial number. Any central office access code with an asterisk (*)
in it must be entered as **. See Abbreviated Dial in this document for
information on special codes.
Conditions The following conditions apply to this feature:
This feature is available in Generic 1004 and 1005.
Only one SMDR record will be generated by a call using this feature;
also, digits dialed after the flash are not appended to the SMDR re-
cord.
The trunk must be in a trunk group in order to flash over the trunk
Ensure that the DTMF option in CDE Form 13 -Trunk Circuit Descrip-
tors (Select Options Subform) is set up to the option which is
understood by the local central office. If this is not done, the local cen-
tral office will not receive the digits dialed after the flash.
If the user makes an error while dialing digits to the local central office,
the user must wait for it to timeout and return to the previous state
(there is no CANCEL function, and no back arrow key).
This feature may be used by telephones only.
The feature will not function if there is a conference on consultation
hold. It will only function if there is one trunk on consultation hold.
Programming
Perform the following:
l
Enable COS Option 257 (Flash Over Trunk) in the COS of the tele-
phone(s) permitted to flash over trunks.
l
Assign a feature access code to Feature 46 (Flash Over Trunk) in
Form 02 (Feature Access Codes).
l
In the Select Options Subform of CDE Form 13 (Trunk Circuit Descrip-
tors), set the Flash Over Trunk option to YES, set the Flash Type