4-13Trunk Monitor or Service ObservingThis feature allows the user who barged in to retain the trunk call after the barged-in on station hashung up.Executive/Secretary PoolingEach keyset may be defined as an executive (BOSS) or a secretary (SECR) keyset insystem programming. Each ‘executive’ can have up to four ‘secretaries’, and each ‘secretary’can have up to four ‘executives’, assigned to it. These arrangements are known as execu-tive/secretary pools. There can be multiple pools in a system. When an executive is in DNDmode, all calls to the executive ring the first secretary assigned to that executive; if that sec-retary is busy, the call hunts to the next available secretary assigned. If the secretary needsto communicate with the executive while the latter is in DND mode, pressing the correspond-ing executive key on the secretary’s keyset results in an Auto Answer internal call beingmade to the executive (providing the executive is free). The OfficeServ 100 software has asystem-wide option to allow the stations to ring rather than auto announce the executive sec-retary calls. A station can only be the executive of one secretary pool. In addition, a stationcannot be in more than one pool.See also Boss/Secretary Service for additional features available for executive/secretaryworking.External Music InterfacesThe system provides up to two inputs for connecting to customer-provided external musicsources. The Basic KSU provides one input on the base board (selectable internal/external)and the optional MISC card provides another. Music sources can be used to provide back-ground music, or any of the varied Music-On-Hold (MOH) functions.External Page InterfacesThe system base board provides one external page output and the optional MISC card pro-vides an additional external page output and three relays which can be used for page zonecontrol. Multiple relays may be assigned to each zone.Flash Key OperationWhile a user is on an outside line, pressing the FLASH key will flash the central office orPBX. This is used for custom calling features on C.O. lines or in conjunction with CEN-TREX/PBX operation. System programming allows individual flash times for C.O. and PBXlines. When C.O. or PBX flash is not required, setting the timers for two seconds releases theexisting call and returns dial tone to make a new call.Flexible NumberingSystem programming allows stations to have 2-, 3- or 4-digit extension numbers beginningwith the digit 2 or 3. By default, extension numbers begin with 201. Station group numberscan be three or four digits beginning with the digit 5. Other numbering plans can be used.Using digits other than ‘2’, ‘3’ or ‘5’ will require the installer to change other feature accesscodes in the system default numbering plan. Take this into account when referring to Sam-sung Keyset User Guides as these all assume that the default numbering plan is being used.