Specifications

Chapter 3: Product Description
Single-Line Adapter
Page 3-10 Mitel
®
5000 Installation Manual – Issue 3.0, October 2008
Single-Line Adapter
A Single-Line Adapter (SLA), which can be installed on an available DEM-16 circuit, is used for
connecting two AC-ringing, single line DTMF or pulse-tone sets, playback devices, and/or off-
premises extensions.
With a system installed in the United States, an SLA can also be used for connecting two Direct
Inward Dialing (DID) trunks—or, one single line endpoint and one DID trunk. For more
information on using DID trunks, refer to the Inter-Tel 5000 Features and Programming Guide
(part no. 580.8006). SLAs are shipped with both ports set for single line device operation.
Before connecting a DID trunk, be sure to open the unit and set the corresponding port for DID
operation. Also, if necessary, adjust the hybrid balance setting to better accommodate longer
loop lengths. For installation instructions, see the Installation chapter.
AC-ringing off-premises extensions can be connected directly to the SLA circuit. External high-
voltage ringing adapter (HVRA) units, power supplies, and ring generators are not needed.
Each SLA, whether used for single line sets or DID trunks or both, is powered by its own AC
transformer. Also, SLAs have two self-correcting thermistors. If a short circuit causes a
thermistor to open, it will automatically close when the short is removed.
IMPORTANT
SLAs do not support visual Message Waiting applications. If single line sets
with Message Waiting lamps are installed on SLAs, the lamps will not
function. However, single line sets can be configured in DB Programming to
receive audible Message Waiting tones.
NOTICE
Possible system degradation. For optimal system performance, do not use SLA circuits for
Voice Mail and Automated Attendant functions. Rather, the Voice Processing PC and
applications software should be used for these purposes.