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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Architecture
Page 1-13Protocols
1
NOTE:
ADU means Asynchronous Data Unit
BCS means Business Communications System
MSA means Message Servicing Adjunct
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 1-4. Protocols Used in DEFINITY — Continued
Protocol Applications
Maximum
Data Rate Maximum Distance
Continued on next page