3Com SuperStack II User Manual

Serial Device Requirements 33
Figure 5 Reset Switch (Model 5xx)
Serial Device
Requirements
Serial devices using the V.25bis command set over a SuperStack II
bridge/router must support:
■ High-level data link control (HDLC) with NRZ.
■ CRN command.
■ 8 (data bits), N (no parity), and 1 (stop bit) if a parity option is
provided.
■ V.25bis addressed mode.
■ Synchronous data and DTE connection. The SuperStack II NETBuilder
bridge/router does not support an asynchronous serial connection.
Serial devices using the DTR command set over a SuperStack II
bridge/router RS-232 interface must support:
■ DTR State to Dial: HIGH.
■ DTR State Hangup: Low.
■ DTR State Answer: HIGH.
■ Synch Data Xmt (synchronous data and DTE connection). The
SuperStack II NETBuilder bridge/router does not support an
asynchronous serial connection.
■ Auto Answer mode.
■ User-stored phone number.
Left side of unit
Reset switch
HWBook Page 33 Friday, June 19, 1998 3:42 PM

3Com SuperStack II Specifications

General

Brand	3Com
Model	SuperStack II
Category	Switch
Language	English