DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123 Issue 1
April 1997
Maintenance Object Repair Procedures

Page10-467DIG-LINE (Digital Line)

10

terminal via a Digital Terminal Data Module (DTDM) or a Data Adaptor (DA). All

other devices currently supported by Digital Line circuit packs communicate on

the primary information channel. Figure 10-26 shows examples of digital line

connectivity.

Only the TN754B or TN2136 should be used in out-of-building applications. For

important information pertaining to protection required for out-of-building digital

voice terminals, see

DEFINITY Communications System Generic 1 and Generic 3 Installation and Test,

555-230-104.

It should be noted that TN2181 and TN2224 supports both modes as shown in

Figure 10-26 and Figure 10-27.

Figure 10-26. Digital Line Connectivity

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TN413, TN754/B
Digital Line
Circuit Pack
Port
Port
Port
Port Secondary Information Channel (Data)
DTDM
Digital
Voice
Terminal
Control Channel (Signaling)
Primary Information Channel (Voice)
Physical Connection
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Digital Line
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Terminal
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