NEC DSX 1093099 - Manual (Page 84)

Flash
76 ◆ Features DSX Feature Handbook
Flash
Description
Flash allows an extension user to access certain CO and PBX features by interrupting line loop current.
Flash lets an extension user take full advantage of whatever features the connected telco or PBX offers. You
must set the Flash parameters for compatibility with the connected telco.
Operation
Extension users can access certain CO and PBX features by interrupting line loop current.
Flashing and Outside Line
In these instructions:
[Super Display Soft Key]
[Keyset Soft Key]
To Flash the outside line you are on:
1. Do one of the following.
a. At a keyset, press FLASH .
b. At a single line telephone, hookflash and dial #3 .