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- Configuring Fractional E1 Time Slots
Configuring Fractional E1 Time Slots
By default, all the time slots on an E1 interface are used. To configure the number of time slots allocated to a fractional E1 interface, include the timeslots statement at the [edit interfaces interface-name e1-options] hierarchy level:
- [edit interfaces interface-name e1-options]
- timeslots time-slot-range;
There are 32 time slots on an E1 interface. Time slot 0 is always reserved for framing and cannot be used to configure a fractional E1 interface.
Time slot numbering constraints vary for different E1 PICs. For 4-port E1 PICs, the configurable time-slot range is 1 through 31 (time slot 0 is reserved for framing).
For 10-port Channelized E1 and 10-port Channelized E1 IQ PICs, the configurable time-slot range is 2 through 32 (time slots 0 and 1 are reserved for framing).
For Enhanced Intelligent Queuing (IQE) PICs, the configurable time-slot range is 2 through 32.
For fractional E1 interfaces only, if you connect a 4-port E1 PIC interface to a device that uses time slot numbering from 2 through 32, you must subtract 1 from the configured number of time slots. To do this, include the timeslots statement at the [edit interfaces interface-name e1-options] hierarchy level, and offset 1 from the specified slot number.
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Note: When configuring fractional E1 time slots, you also must include the framing g704 statement at the [edit interfaces e1-fpc/pic/port e1-options] hierarchy level. |
To configure ranges, use hyphens. To configure discontinuous time slots, use commas. Do not include spaces
Example: Configuring Fractional E1 Time Slots
In this example, time slots are offset by 1 to compensate for the fractional E1 interface being connected to a device that uses time slot numbering from 0 through 31.
Use Time Slots 3 Through 5, 10, and 24
- [edit interfaces interface-name e1-options] # Fractional
E1 interface
- timeslots 4-6,11,25;
Use Time Slots 1 Through 5, 10, and 24
- [edit interfaces interface-name e1-options]
- timeslots 1-5,10,24;