Patton electronic 3088 Series user manual S1-8 TX Clock RocketLink-G models 3088/CA and 3088/D

Model 3088 Series User Manual 2 • Configuration

S1-8: TX Clock (RocketLink-G models 3088/CA and 3088/D)

Table 6. S1-8 TX Clock DIP switch settings

S1-8	Setting	Description
ON	Normal	TD sampled on falling edge of TX clock.
OFF	Inverted	TD sampled on rising edge of TX clock.

S2-2: Line Probe (Models 3088/CA and D)

Line probe is a mechanism that determines the highest rate (192K to 2304K) that the DSL link can reliably support. This takes place during training. The DSL rate will be set to the rate that line probe determines. Note that both the CO and CPE unit must have line probe enabled for it to take effect.

Line probe could be used to determine the best rate the line will support, and then the user could set the units for that rate and disable line probe so that the rate won’t change without the user’s knowledge.

Table 7. S2-2 Line Probe Switch Settings

S2-2	Line Probe
ON	Disabled
OFF	Enabled

S2-3: Annex A/B (Models 3088/CA and D)

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.

Table 8. S2-3 Annex Type settings

S2-3	Annex
ON	A
OFF	B

S2-4 through S2-5: Clock Mode (Models 3088/CA and D)

The RocketLink-G can operate in one of three clock modes: internal, network, or receive-recover.

Table 9. 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 serial
			and DSL lines.
OFF	ON	Network	3088 uses the RX clock from the serial interface as the clock for the
			DSL link.
ON	OFF	Receive-Recover	3088 uses the RX clock from the DSL line as the clock for the serial
			interface.
OFF	OFF		Reserved

Introduction 27