Nortel Communication Server 1000S Installation And Configuration Manual page 372

Page 372 of 394
553-3001-201 Standard 2.00
2.0 Mb ISL implementation
• Modems such as the Ventel 2400, Hayes 2400 (the Hayes Smartmodem
2400 cannot be used on leased lines) or Gandalf 2400 that can support 2
or 4-wire leased line operation. 4-wire operation must be specified when
ordering. Otherwise, modems are factory shipped for 2-wire operation.
Modems capable of the following:
— autodial capability
— minimum of 2400 baud
— synchronous operation
— programmable so that one modem originates the call while the other
auto-answers
• NTAK19BA 4-port SDI cable.
• NT8D09 500 set line card.
Figure 90
ISL in dedicated mode using dial-up modem
Small System
NTAK02
DCHI
500
line
TIE
TIE
September 2004
NTAK19BA QCAD42A
modem
modem
twisted
pair
ISL D-channel
ISL TIE trunks
Large System
DCHI
500
twisted
line
pair
TIE
TIE
553-AAA1076