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Introduction 27
Model 3088A Series Getting Started Guide 2 • Configuration
Ethernet Management Port
The 3088A offers a 10/100 Ethernet port for configuration and management via Telnet sessions. Because the
Ethernet port is configured as MDI, a crossover Ethernet cable is required when connecting directly from a
local PC or laptop. The Ethernet interface default IP address is 192.168.200.1.
Through the Ethernet management port, the following variables can be configured:
• Password: The password used to login to the console.
• Circuit ID: The circuit ID communicated to other units via EOC. EOC (Embedded Operations Channel)
is an out-of-band channel specified in the G.991.2 standard for SHDSL. We use standard EOC messages
for our remote loopback. The 3088A also supports proprietary EOC messages that allow a 3096RC to con-
figure it.
• Clock Mode: The following options are available:
- Internal: The internal oscillator in the 3088A provides the clock to both the serial/E1 and DSL interfaces.
- Network: The E1 interface provides the clock for the DSL interface (E1 only).
- External: The serial interface provides the clock for the DSL interface (RS-232, V.35, X.21). X.21 can
only be set to DCE if DTE signal element timing is provided to pins 7/14. Otherwise, it must be set to
DTE.
- Receive Recover: The 3088A recovers the clock from the DSL interface and provides it to the serial/
E1 interface.
• Data Rate: Both the serial/E1 and DSL data rates are set by specifying the number of 64k timeslots.
• Pass Framing: For E1, the entire TS0 time slot is passed. When E1 is configured for CAS (Multiframe),
the entire TS0 time slot and all of TS16 are both passed.
• Pass Alarms: When Passed Framing is enabled, the alarms are always passed, even if Pass Alarms is disabled.
When Passed Framing is disabled, you can pass alarms by enabling Pass Alarms.
• Rx Equalizer: This can be enabled to remove distortion introduced in the E1 cable.
• Line Type: The following framing formats are available:
- E1-Unframed: G.703 Clear Channel
- E1-Fractional: G.703/G.704 fractional.
- E1-CRC: Includes CRC multiframe.
- E1-Multiframe: Includes channel associated signalling (CAS).
- E1-CRC & Multiframe: Includes CRC and CAS multiframe.
• Line Code: The following line codes are available:
- AMI: Alternate Mark Inversion.
- HDB3: High Density Bipolar 3 (E1 only).
• Line Build Out: The following line build outs are available:
- Pulse-75 (E1 only)
- Pulse-120 (E1 only)