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Chapter 4: DIP Switches
Fractional E1 SW4-1 SW4-2 SW4-3 SW4-4 SW4-5 SW4-6 SW4-7 SW4-8
Channel No. OFF 2 3 4 5 6 7 8
SW5-1 SW5-2 SW5-3 SW5-4 SW5-5 SW5-6 SW5-7 SW5-8
Channel No. 9 10 11 12 13 14 15 16
SW6-1 SW6-2 SW6-3 SW6-4 SW6-5 SW6-6 SW6-7 SW6-8
Channel No. 17 18 19 20 21 22 23 24
SW7-1 SW7-2 SW7-3 SW7-4 SW7-5 SW7-6 SW7-7 SW7-8
Channel No. 25 26 27 28 29 30 31 32
Table 4-3. Fractional E1 (31 channels) selections.
NOTE: SW4-1 (Channel 1) is NOT available, and must be set to“OFF”. SW6-1 (Channel 17) can be selected “ON”
only when E1 CRC4 framing mode is selected. SW4–SW7 DIP switches defaults are set to “OFF.”
4.2 Factory Default DIP Switch Configuration
The factory default DIP switches setting are shown in Table 4-4. Before you change any settings, make sure every parameter and
all the configurations for both pairs of T1/E1 Ethernet Network Extenders are the same. Call Black Box Tech Support for details.
DIP Switches ON/OFF DIP Switches ON/OFF
SW1-1 ON (T1) SW2-1 OFF
SW1-2 OFF (100 ohm) SW2-2 OFF
SW1-3 OFF (Unframed) SW2-3 OFF
SW1-4 OFF (Unframed) SW2-4 OFF
SW1-5 OFF (B8ZS) SW2-5 OFF (Nx64)
SW1-6 OFF (DS1) SW2-6 OFF (Full T1)
SW1-7 OFF (0 db) SW2-7 OFF (All zeros)
SW1-8 OFF (LBO) SW2-8 OFF (Internal)
Table 4-4. Factory default configuration.