TN793/TN793B is a dual coded, analog line 24-port, that performs
all the functions of the TN746B, 16-port analog line circuit pack.
Each port supports 1 telephone, such as 500 (rotary dial) and
2500 terminals (DTMF dial). Use Vintage 6 or greater for the TN793.
Use Vintage 1 or greater for the TN793B.
TN793/TN793B supports on-premises (in-building) wiring with either
touch-tone or rotary dialing and with or without the LED and neon
Message Waiting Indicators. The TN793/TN793B supports off-premises
wiring (out-of-building only with certified protection equipment)
with either DTMF or rotary dialing, but LED or neon message waiting
indicators are not supported off-premises.
TN793/TN793B, along with a TN755B neon power unit per carrier
or per single-carrier cabinet, supports telephones equipped with
neon message waiting indicators (on-premises use only). The TN793/TN793B
supports 3 ringer loads, only 1 telephone can have an LED or neon
message waiting indicator. The TN793/TN793B allows a maximum of
12 simultaneous ports ringing.
TN793/TN793B supports A-Law and µ-law companding and administrable
timers. The TN793 supports queue warning level lights associated
with the DDC and UCD features, recorded announcements associated
with the Intercept Treatment feature, and PagePac paging system
for the Loudspeaker Paging feature. Additional support is provided
for external alerting devices associated with the TAAS feature,
neon message waiting indicators, and modems The TN793/TN793B also
supports secondary lightning protection.