Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

 NT8D14 Universal Trunk card

Note: Refer to “Multi-Channel RAN modes” on 

 for 

information on Multi-Channel RAN modes, which are not linked to a 
RAN machine or a given trunk.

When configured for Recorded Announcement (RAN) operation, a trunk unit 
is connected to a customer-provided recorded announcement machine. 
Announcement machines must be compatible with RAN trunks. Use the 
manufacturer’s instructions to set up the Announcement machines.

Each trunk unit provides the following for operation with RAN equipment:

•

pulse start, level start, or continuous operation modes

•

selectable termination of tip and ring leads into 600 or 900 ohms for 
interface with a low-impedance (2 or 4 ohms) source

•

connection of up to 24 trunk units to a single announcement machine 
channel

Recorded announcement machines store prerecorded voice messages that are 
played back to the trunk units to which they are connected. Most 
commercially available announcement machines store recordings digitally, 
although some drum and tape units are still in service.

An announcement machine can provide one or more channels and each 
channel may be prerecorded with a different message. Some announcement 
machines also provide a Special Information Tone (SIT) capability. These 
tones are inserted at the beginning of intercept messages such as “Your call 
cannot be completed as dialed. Please check the number and try again.”

 shows a typical connection from a single 

announcement machine channel to unit 0 on a universal trunk card.