Configuring T1/E1 application mode

OnSite 2800 Series User Manual	5 • T1/E1 port configuration

The T1/E1 port can be configured to work in either short-haul or in long-haul mode. Short-haulis the default application and should be used for transmission distances up to 180m/600ft. For transmission distances up to 1800m/6000ft, select the long-haulapplication.

Mode: port e1t1 <slot> <port>

Step	Command	Purpose

1	[name] (prt-e1t1)[slot/port]#application	Specifies the e1/t1 application mode
	{long-haul short-haul}	Default: short-haul

Configuring T1/E1 LOS threshold

This command takes effect only if the T1/E1 port is configured for long-haulapplications. It specifies the sen- sitivity for Loss Of Signal threshold. A signal suffers more attenuation over long distances than over short dis- tances. Therefore the LOS-Threshold must be set higher for longer transmission distances. This command has a default value of -46dB what should be enough for distances up to 1600 m/5250 ft.

Mode: port e1t1 <slot> <port>

Step	Command	Purpose

1	[ name] (prt-e1t1)[slot/port]#los-thresh-	Specifies Loss Of Signal Threshold
	old {-4dB -6dB -8dB … -46dB -	Default: -46dB
	48dB}

Configuring T1/E1 encapsulation

Only ‘hdlc’ encapsulation is available on a T1/E1 port. Once encapsulation is configured as ‘hdlc,’ the ‘hdlc’ submode can be entered for selecting the next encapsulation type like ppp or framerelay. Depending on the port-type, the encapsulation ‘hdlc’ selects automatically all timeslots of the port for data transmission (1-31for e1 and 1-24for t1).

It is also possible to use the port in channelized mode. In “channelized” mode, the user selects less than the total number of timeslots for the channel (1-31 for E1, 1 – 24 for T1) is able to configure single or multiple timeslots for data transmission. To use this feature the encapsulation must be configured for ‘channelized;’ afterwards the channel-groupcommand is used to create the channel-group. In the channel-group configura- tion mode, the user selects the specific timeslots, and the encapsulation ‘hdlc’ will be available again. Once the encapsulation of a T1/E1 port is set to ‘channelized’ it is not possible to change the port-type again or to use the ‘unframed’ framing format.

Mode: port e1t1 <slot> <port>

Step	Command	Purpose

1[name] (prt-e1t1)[slot/port]#[no] encapsu- Specifies the encapsulation type of the T1/E1 port.

lation {channelized hdlc}

Default: no encapsulation

Create a Channel-Group

If the desired encapsulated channel uses only selected time slots (not the entire T1/E1), then it is necessary to set up a channel-group. To create a channel-group, set the T1/E1 port’s encapsulation to channelized. (See sec-

T1/E1 port configuration task list