Maintenance Architecture
555-233-123
1-18 Issue 4 May 2002
NOTE:
ADU means Asynchronous Data Unit
BCS means Business Communications System
ACU means Automatic Call Unit
Transmission Characteristics
The system transmission characteristics comply with the American National
Standards Institute/Electronic Industries Association (ANSI/EIA) standard
RS-464A (SP-1378A). The following tables list some general switch transmission
characteristics.
Category
A
Data modules to terminals
or cluster controller
Data module in ASCII
emulation mode
64 kbps
9.6 kbps
500 feet (152 m)
ISDN-BRI Communication interface
to ISDN-BRI S/T
ISDN-BRI U
64 kbps
160 kbps
655 feet (199.3 m) to network
interface or repeater
1310 feet (399.3 m) system
to system
18,000 feet (5486.4 m) from
system to network interface,
and then ~2000 feet to phone
ISDN-PRI Communication interface
to ISDN-PRI
64 kbps 655 feet (199.3 m) to network
interface or repeater
1310 feet (399.3 m) system
to system
Table 1-7. Protocols Used in DEFINITY — Continued
Protocol Applications
Maximum
Data Rate Maximum Distance
Continued on next page
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