Northern Telecom DMS-100 Series General Description, Installation And Maintenance page 2

PRACTICE 297-2011-200
1. OVERVIEW
BUSINESS SET
WITHOUT
ALPHANUMERIC
DISPLAY
1.01 The available versions of the Business Set are as follows:
NT4X20AA Business Set without Alphanumeric Display - with
line cord equipped with Teladapt connectors at both
ends and handset cord hardwired to the set.
NT4X20AE Business Set without Alphanumeric Display - with
line cord equipped with Teladapt connector at the
set-end, spade tips at the other end, and handset cord
hardwired to the set.
NT4X20AL Business Set without Alphanumeric Display - both
line cord and handset cord equipped with Teladapt
connectors at both ends.
NT4X20AB Business Set with Alphanumeric Display - with line
cord equipped with Teladapt connectors at both ends
and handset cord hardwired to the set.
NT4X20AF Business Set with Alphanumeric Display - with line
cord equipped with Teladapt connector at the set-end,
spade tips at the other end, and handset cord
hardwired to the set.
NT4X20AM Business Set with Alphanumeric Display - both line
cord and handset cord equipped with Teladapt
connectors at both ends.
NT4X20AT Business Set with Alphanumeric Display for
Automatic Call Distribution (ACD) service. Equipped
with headset jacks at handset side of set. Line cord
and handset cord equipped with Teladapt connectors
at both ends.
1.02 These business sets (NT4X20AA/AL/AE) are equipped with:
•
eight feature or Directory Number (DN) access keys and associated
Liquid Crystal Display (LCD) indicators
• two feature keys without LCD indicators
•
four fixed feature keys without LCD indicators (Vol.Up, Vol.Down,
Hold, and Rls)
•
a standard 12-button telephone key pad, and
• internal option switches.
1.03 All business sets use voice and "above voice band" signaling
transmission over a 2-wire line. Voice and signaling are frequency division
multiplexed, with binary data transmitted via absence or presence of the carrier
frequency. All feature activation is via this transmission.
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