Specifications

3-12
Cisco ONS 15216 EDFA2 Operations Guide
78-13908-02
Chapter 3 Installation
Communications
Modem Signals
The only signals required for communication are TXD (transmit), RXD (receive), and SIGNAL
GROUND. By adjusting the modem manufacturer settings, the other signals can be ignored.
Modem Power Up
The modem has a DIP switch that overrides certain NVRAM settings during a power up. For consistent
operation throughout the power cycles, the DIP switches must be set as displayed in Table 3-7.
1 US Robotics 56K Fax modem V.90 The modem to ONS 15216 EDFA2
connection must be set for 19200 baud.
The modem to modem connection must
be set for 14400 baud.
1 10-ft DB-25M to DB-9F cable For connection between ONS 15216
EDFA2 and modem.
1 RJ-11 to RJ-11 telephone cable For connection between the modem and
PSTN dial-up telephone line
1 public switched telephone network
(PSTN) dial-up telephone line
Local Site
1 PC running HyperTerminal
US Robotics 56K Fax modem V.90 The modem to ONS 15216 EDFA2
connection must be set for 19200 baud.
The modem to modem connection must
be set for 14400 baud.
1 10-ft DB-25M to DB-9F For connection between PC COM port
and modem.
1 RJ-11 to RJ-11 telephone cable For connection between the modem and
PSTN dial-up telephone line.
1 PSTN dial-up telephone line
Table 3-6 ONS 15216 EDFA2 Communication Components (continued)
Component Notes
Table 3-7 DIP Switch Setting
DIP Switch Setting Up (U) or Down (D) Description
1 D Data terminal ready override
2 U Verbal result codes
3 U Suppress result codes
4 D No echo, offline commands
5 U Auto-answer on first ring, or higher if
specified in NVRAM