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2-4 SmartCell ZX-250 User Guide
Installing the Switch Switch Installation and Setup
If the switch’s hardware or software configuration is incorrect, contact Cabletron customer support immediately.
2.3.1 DS3 and E3 I/O Module Configuration
Table 2-2 shows the pre-configured values for both the DS3 (ZX-IOM-67-4) and E3 (ZX-IOM-77-4) I/O modules.
These values cannot be changed. Accordingly, configure the connecting device’s interface to use these values.
2.4 INSTALLING THE SWITCH
SmartCell ZX-250 switches are designed to operate either while sitting on a desktop on their rubber feet or while
mounted in a rack by side-panel mounting brackets.
2.4.1 Desktop Installation
ZX-250 switches can be installed on any clean, dry, stable surface (desktop) that allows for at least four inches of clear
space on both sides of the switch:
U ZX-250 — 17.5 inches wide by 14.5 inches deep
U ZX-250r — 17.5 inches wide by 20.5 inches deep
2p›F Because the ZX-250r power supply modules install from the back of the switch,
you may want to select a surface that provides sufficient room to remove and
install the power supply modules.
Table 2-2 DS3 and E3 Module settings
Protocol Mode Framing Empty Cell Timing Scrambling Length
DS3
plcp cbit unassigned internal off greater than 225 ft.
E3
plcp G.751 unassigned internal off N/A