Chapter 3. Configuration

T1 Line Length

Set the line length for each T1 interface according to the distance from the MX2800 STS-1 to your DTE device. Set to -7.5DB if the attached DTE device only supports DS1 levels.

T1 Remote Loopback

Allows a selected T1 to respond to CSU or NIU loopbacks arriving from the STS-1 side.

T1 Circuit Protection

T1 Circuit Protection determines which circuit will be allowed to initiate a protection switch if a failure in the circuitry for that channel is detected. If a T1 is set to DISABLED, then the failure of the circuitry of that one channel will not cause a protection switch. If set to ENABLED, then the failure of a channel could cause a protection switch to occur (depending on the PROTECTION THRESHOLD setting).

Hairpin Loopback

Hairpin back the VT to the STS-1 signal for dropping farther down the SONET ring.

Line ID

Enter user-configurable text strings to name the individual T1 lines. This field will accept up to 18 alpha-numeric characters, including spaces and special characters (such as an underbar).

Set Multiple

SET MULTIPLE (see Figure 3-6 on page 3-10) can be used to enable/ disable a contiguous group or all of the VTs at one time. It may also be used to make multiple changes to the line coding, length, circuit protection or loopback detection of a contiguous group or all VTs at one time.

61200659L1-1

MX2800 STS-1 User Manual

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