Introduction
27
Model 3088A Series User Manual
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 (1-10 characters).
•
Circuit ID
: The circuit ID communicated to other units via EOC (1-64 characters). EOC (Embedded
Operations Channel) is an out-of-band channel specified in the G.991.2 standard for SHDSL. We use stan-
dard EOC messages for our remote loopback. The 3088A also supports proprietary EOC messages that
allow a 3096RC to configure 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)
