DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Architecture

1-38Protocols

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 Nati onal

Standards Institute/Electronic Industries Assoc iation (ANSI/EIA) standard

RS-464A (SP-1378A). The following tables list some general switch transmission

characteristics.

Category
AData modules to terminals
or cluster controller
Data module in ASCII
emulation mode
64 kbps
9.6 kbps
500 feet (152 m)
ISDN-BRI Communication interfac e
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

Tabl e 1 -1 1. Protocols Used in DEFINITY — Continued

Protocol Applications Maximum
Data Rate Maximum Distance
Continued on next page