DS3/E3 (VLNC50, VLNC52, and VLNC55)

Electrical specifications

The DS3 interfaces transmit/receive a standard electrical DS3 signal as specified in GR-499-CORE, Section 9 (44.736 Mb/s rate, DSX-3 interconnect specification, bipolar 3-zero substitution (B3ZS) encoding). However, the signal does not have to contain a standard DS3 frame.

The E3 interfaces transmit/receive a standard electrical E3 signal as specified in ITU G.703 and G.823.

DS3 transmission length

When transmitting DS3 signals to a DSX panel, the approximate span length is 450 feet.

Table 10-2: DS3 cable lengths

Cable type

LBO in

LBO out

728A/B

0–225 ft.

225–450 ft.

735A

0–112 ft.

112–225 ft.

Performance monitoring

For a detailed list of DS3 PM parameters and thresholds, refer to DS3 performance monitoring parameters in Chapter 5, Operations, administration, maintenance, and provisioning.

E3 performance monitoring is not supported in this release.

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