GAI-Tronics 227-005 SMART Auto-Dial Handset Telephones - Manual (Page 8)

Pub. 42004-443C
SMART A UTO -D IAL H ANDSET T ELEPHONES P AGE
6 of 31
f:\standard ioms - current release\42004 instr. manuals\42004-443c.doc
02/13
General Installation Guidelines
As previously noted, the preferred system configuration is a dedicated telephone line for each -005
SMART Telephone. This is an actual requirement when using TMA in its typical “polling” operation.
Although it is not recommended, it is recognized that certain system operations and interconnecting
wiring require that multiple telephones share a single line. This is permissible with the understanding that
if two or more telephones sharing the same line are put into use simultaneously, the line current could
drop sufficiently to disconnect the call completely. Additional “line sharing” or “party line”
configuration issues could include sporadic telephone operation, difficulties with programming, or
premature disconnection of calls. A GAI-Tronics Model 12600-xxx Line Current Booster assembly may
be a viable solution for improving the effects of low line current.
If line sharing is required, it is strongly recommended that all telephones on the line are the -005 SMART
Telephone series. The maximum number of telephones on the line depends on operating and idle line
current and the amount of time a SMART Telephone remains off hook. In this installation, each -005
SMART series telephone must be reconfigured to prevent auto answer and must be programmed to “call-
in” to TMA for data collection (if TMA is being utilized).
Due to difference in circuit operation, sharing a telephone line between a -005 series SMART Telephone
and a -003 series SMART Telephone is specifically not recommended. There can be many line and
operational conditions in play that could make this type of installation a “hit or miss” proposition.