Inter-Tel AXXESS Manual page 109

NOTE:
speakerphones for Eclipse Basic Digital and Associate Display Phones, see
4.108 The EKSC has a tone generating circuit for providing system tones (busy, reorder, do-
not-disturb, etc.) to the phones connected to the card, if necessary. It is available in case there
are no voice channels available in the system to issue tones from the CPC or CPU when
needed.
4.109 Also, it has a switching matrix to allow access to any available time slot on the card's
PCM highway (bus). This is provided since the card may need up to 24 simultaneous voice
channel connections.
4.110 The green LED (CARD ON-LINE) on the EKSC indicates the card's functional readi-
ness and a yellow LED (CIRCUIT BUSY) indicates whether any circuit on the card is busy
(see Figure 3-56
edge of the card to help prevent electromagnetic interference.
4.111 EKSC Extended Loop Length Modification: For longer station loop lengths up to
103 ohms/2000 ft. (609 m.), if necessary, an optional external power supply with the following
characteristics can be connected to the power supply connector on the EKSC:
•
36VDC
•
120mA per phone
Single-Line Card (SLC)
4.112 Each SLC provides up to eight circuits for connecting on-premises, AC-ringing, single-
line DTMF or pulse-tone sets and playback devices. (Version 2.x or later is required for pulse-
tone sets.)
4.113 The card has one or two onboard, square-wave, AC ring generators (depending on the
card version). Each ring generator has a total ringer equivalence number (REN) of 8.0
(although no circuit on the card can have a REN above 3.0). The REN provided by the onboard
ring generator(s) should be adequate for most installations. However, if a fax machine, modem,
or single-line set does not respond to the ringing provided by the on-board ring generator(s) or,
if the REN capability of the card is exceeded, an external (customer-provided) 20 Hz sine-
wave ring generator should be used instead.
NOTE:
for optimal system performance, the Voice Processing PC and applications software should be
used for voice mail and automated attendant functions, rather than using SLC or SLA circuits.
4.114 Each SLC can be equipped with an optional Lamp Option Card (LOC) to provide visual
message waiting capabilities for single-line sets equipped with message lamps. Single-line sets
are then configured in DB Programming to receive visual and/or audible message waiting indi-
cation tones.
4.115 SLCs have self-correcting thermistors to protect the -48V output. If a short circuit
causes a thermistor to open, it automatically closes when the short is removed.
4.116 Each SLC has a green LED (CARD ON-LINE) to indicate the card's functional readi-
ness and a yellow LED (CIRCUIT BUSY) to indicate if any circuit on the card is busy (see
Figure 3-57
of the card to help prevent electromagnetic interference.
Single-Line Card (SLC)
INTER-TEL
For information on Caller ID [CLIP] features, see
on page 3-114). Also, each card has a metal EMI shield attached to the front
Off-premises stations cannot be legally connected to SLCs; use SLAs instead. Also,
on page 3-117). Also, each card has a metal EMI shield attached to the front edge
® ®
AXXESS MANUAL VERSION 11.0 – May 2008
page 5-72. For information on shared
Specifications
page 5-124.
Page 2-41
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