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Introduction 31
Model 3088 Series User Manual 2 • Configuration
S1-7 and S1-8: Line Build Out (Models 3088/K and 3088/T)
Switches S1-7 and S1-8 define the shape of the waveform on the T1 or E1 line, as shown in table 15.
Note
75 Ohms corresponds to the BNC connectors on Model 3088/K.
120 Ohms corresponds to the T1/E1 (RJ-45) interface on Models 3088/K
and 3088/T.
S2-2 Line Code (Models 3088/K and 3088/T)
Switch S2-2 defines the T1 or E1 network line coding.
S2-3: Annex A/B (Models 3088/K and 3088/T)
Annex A is typically used in North American-like networks, whereas Annex B is typically used in European-
like networks. The different annexes specify different PSD (power spectral density) masks because of the differ-
ence in T1 and E1 PSDs.
S2-4 through S2-5: Clock Mode (Models 3088/K and 3088/T))
The RocketLink-G can operate in one of three clock modes: internal, network, or receive-recover.
Table 15. S1-7 – S1-8: Line Build Out Settings
S1-7 S1-8 Line Build Out (E1) Line Build Out (T1)
ON ON Pulse-75 Ohm 0.0dB
OFF ON Pulse-120 Ohm -7.5 dB
ON OFF Not Applicable -15.0dB
OFF OFF Not Applicable -22.5dB
Table 16. S2-2 Line Code Switch Settings
S2-2 T1 Line Code E1 Line Code
ON AMI AMI
OFF B8ZS HDB3
Table 17. S2-3 Annex Type settings
S2-3 Annex
ON A
OFF B
Table 18. S2-4 and S2-5 Clock Mode Settings
S2-4 S2-5 Clock Mode Description
ON ON Internal The on-board oscillator in the 3088 provides clock for both T1/E1
and DSL lines.
OFF ON Network 3088 uses the RX clock from the T1/E1 interface as the clock for
the DSL link.
ON OFF Receive-Recover 3088 uses the RX clock from the DSL interface as the clock for the
T1/E1 line.