Configuring Fractional T1/E1 Devices
This document describes the configuration commands for Fractional T1 and E1 devices. It includes the following topics:
Displaying the T1 Prompts
Displaying the E1 Prompts
Fractional T1 and E1 Commands
Overview of Fractional T1/E1 Devices
The FTE1 device comes configured for either T1 or E1, but not both. The FTE1 software automatically detects at runtime which option is present, and restricts configurations accordingly for either T1 or E1 operation.
Physical Device Features
T1 modules support the following features:
E1 modules support the following features:
Data Link and Signalling Support
The following is a list of data link and signalling support for Fractional T1/E1 modules, including channel and data types.
In addition, the T1 module supports
Limitations
The Fractional T1 and E1 modules do not support Primary Rate ISDN (PRI) or channelized T1/E1.
Displaying the T1 Prompts
The T1 configuration applies to a physical device. The configuration prompt includes the number of the interface you are configuring. If you have multiple interfaces on one device, it does not matter which Circuit Config <NET-#> prompt for the device you use to get to the T1 Configuration prompt.
To display the T1 Config <WAN#> prompt,
- 1. To see a list of devices, enter list devices at the Config> prompt. To see a list of interfaces, enter list interfaces at the Config> prompt.
- 2. Enter the network command to display the circuit configuration prompt. The network number is the number of a serial interface.
Config>network
What is the network number [0]? 1
Circuit Configuration
Circuit Config <NET-1>
- 3. Enter s1 at the Circuit Config <NET-#> prompt.
Circuit Config <NET-1> sl
Serial Line Configuration
Serial Config <WAN2>
- 4. Enter t1 at the Serial Config <WAN#> prompt.
Serial Config <WAN2>t1
T1 User Configuration
T1 Config <WAN2>
- Note:
Notice that the Serial Config and T1 Config prompts include the number of the device you are configuring, not the interface.
To display the T1 <WAN#> prompt,
- 1. To see a list of devices, enter list devices at the + prompt. To see a list of interfaces, enter list interfaces at the + prompt.
- 2. Enter network followed by the number of the interface you want to monitor.
+network 1
Circuit <NET-1>
- 3. Enter s1 at the Circuit <NET-#> prompt.
Circuit <NET-1> sl
Serial Line Console
Serial Console <WAN2>
- 4. Enter t1 at the Serial Console <WAN2> prompt.
Serial Console <WAN2> t1
T1 User Console
T1 <WAN2>
Displaying the E1 Prompts
The E1 configuration applies to a physical device. The configuration prompt includes the number of the interface you are configuring. If you have multiple interfaces on one device, it does not matter which Circuit Config <NET-#> prompt for the device you use to get to the E1 Configuration prompt.
To display the E1 Config <WAN#> prompt,
- 1. To see a list of devices, enter list devices at the Config> prompt. To see a list of interfaces, enter list interfaces at the Config> prompt.
- 2. Enter the network command to display the circuit configuration prompt. The network number is the number of a serial interface.
Config>network
What is the network number [0]? 4
Circuit Configuration
Circuit Config <NET-4>
- 3. Enter s1 at the Circuit Config <NET-#> prompt.
Circuit Config <NET-4> sl
Serial Line Configuration
Serial Config <WAN1>
- 4. Enter e1 at the Serial Config <WAN1> prompt.
Serial Config <WAN1> e1
E1 User Configuration
E1 Config <WAN1>
- Note:
Notice that the Serial Config and E1 Config prompts include the number of the device you are configuring, not the interface.
To display the E1 <WAN#> prompt,
- 1. To see a list of devices, enter list devices at the + prompt. To see a list of interfaces, enter list interfaces at the + prompt.
- 2. Enter network followed by the number of the interface you want to monitor.
+network 4
Circuit <NET-4>
- 3. Enter s1 at the Circuit <NET-#> prompt.
Circuit <NET-4> s1
Serial Line Console
Serial Console <WAN1>
- 4. Enter e1 at the Serial Console <WAN1> prompt.
Serial Console <WAN1> e1
E1 User Console
E1 <WAN1>
Fractional T1 and E1 Commands
Table 1 summarizes the Fractional T1 and E1 commands. The software detects which module you have installed, T1 or E1, and displays the appropriate commands for that module.
Press Space twice after you type a command to display the available parameters for each command. Enter help for information about using the command line interface.
[C] means the command is available at the T1 Config <NET-#> or E1 Config <NET-#> prompt.
[M] means the command is available at the T1 <WAN#> or E1 <WAN#> prompt.
Clock [M]
Sets the clocking for T1 or E1 modules to either derived or internal. By default, clocking is derived from the network. You should use internal clocking only in configurations where two T1 or E1 modules are connected back-to-back.
Syntax: clock
Example: clock
D(ervied) or I(nternal) [D]?
Disable [M]
For T1 modules, disables T1 line (remote) loopback or disables T1 payload loopback.
Syntax: disable
- line_loopback
- payload_loopback
The following example disables line loopback for a T1 module.
Example: disable line_loopback
For E1 modules, disables E1 line (remote) loopback.
Syntax: disable
Example: disable
Enable [C] [M]
At the configuration prompt, enables active timeslots.
At the monitoring prompt, enables loopback.
Enable [C]
Enables active T1 or E1 timeslots for this interface. You can enter the timeslot values individually or in contiguous ranges.
For T1 interfaces you can enter values of 1 through 24.
For G.704 (structured) E1 interfaces, you can enter values or 1 through 15 and 17 through 30. You must also use the set e1 command to set the E1 format to G.704 (structured) before you can enable timeslots.
Syntax: enable
The following example enables an individual timeslot:
Example: enable
Timeslot number(s) to enable? 1
The following example enables a range of timeslots:
Example: enable
Timeslot number(s) to enable? 1-6
Enable [M]
For T1 modules, enables T1 line (remote) loopback or enables T1 payload loopback.
Syntax: enable
- line_loopback
- payload_loopback
The following example enables line loopback for a T1 module.
Example: enable line_loopback
For E1 modules, enables E1 line (remote) loopback.
Syntax: enable
Example: enable
Exit [C]
Returns to the previous prompt.
Syntax: exit
Example: exit
Circuit Config <NET-1>
List [C]
Lists the current configuration of the T1 or E1 module.
Syntax: list
The following example is a display of a T1 module
Example: list
Circuit Id:
Timeslots enabled: 1 2 3 4 5 6 . . . . . . . . . .
. . . . . . . .
DS0 channel speed: 56K
CRC6 mode: ANSI
Line Build Out: 0 - 133 feet/0 dB
The following example is a display of an E1 module
Example: list
Circuit Id:
Timeslots enabled: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Frame Format: Unstructured
Parameters [M]
Displays current runtime configuration of the T1 or E1 module.
Syntax: parameters
Example: parameters
The following example is a display of a T1 module
Timeslots enabled: 1 . . . . . . . . . . . . . . .
. . . . . . . .
DS0 channel speed: 56K
CRC6 mode: ANSI
Line Build Out: 0 - 133 feet/0 dB
The following example is a display of an E1 module
Timeslots enabled: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Frame Format: Unstructured
Set [C]
Sets parameters for T1 and E1 modules.
Syntax: set
- channel-speed
- circuit-id
- crc6
- e1
- line-build-out
channel-speed
This command applies only to T1 devices. Sets the speed of the T1 device to 56K or 64K. The default is 56K.
Example: set channel-speed
T1 Channel Speed (56/64) [64]?
circuit-id
This command applies to T1 and E1 devices. Use the circuit ID to label your T1 or E1 line for SNMP purposes.
Example: set circuit-id
Circuit Id?
crc6
This command applies only to T1 devices. It sets the Cyclic Redundancy Check (CRC) framing to ANSI or Japanese.
Example: set crc6
ANSI or JAPanese CRC6?
e1
This command applies only to E1 devices. Sets the CRC-Multiframe framing for E1 to unstructured or G.704. The default is unstructured.
Example: set e1
U(NSTRUCTURED) or G(704) [U]?
line-build-out
This command applies only to T1 devices. It specifies the line build out for the physical T1 connection. The line build-out parameter allows shaping of the signal waveforms for various cable lengths.
For short-haul (DSX-1) applications, enter the build out in feet, from 0 to 655.
Example: set line-build-out
Short-haul (DSX-1) or long-haul (DS-1/CSU) ? short
Build out (feet) [266]?
For long-haul (DS-1/CSU) applications, enter the build out in decibels. Valid values are 0, 7.5, 15, and 22.5.
Example: set line-build-out
Short-haul (DSX-1) or long-haul (DS-1/CSU) ? long
Build out (-dB) [7.5]? 15
Statistics [M]
Displays statistics for the T1 or E1 module. The counters contain the number of occurrences of various violations and alarms since the last reset or the most recent clearing of the statistics for this interface. (To clear statistics for an interface, enter clear followed by the number of the interface you want to clear at the + prompt.)
The line state field shows the status of the line synchronization in either direction (No Signal, Unsynchronized, RAI, AIS, Synchronized, Payload Loopback, or RCL).
The following example shows statistics for a T1 module.
Example: statistics
T1 Line Statistics
Line State: No Signal
Current Interval Time: 16
Line Code Violations: 0 Path Code Violations: 0
Unavailable Seconds: 16 Errored Seconds: 0
Bursty Errored Seconds: 0 Severely Errored Seconds: 0
Severely Errored Framing Sec: 16 Line Errored Seconds: 0
Controlled Slip Seconds: 0
The following example shows statistics for an E1 module.
Example: statistics
E1 Module and Link Statistics
Line State: RCL(Carrier Loss)
Current Interval Time: 5
Line Code Violations: 0
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