Cisco Systems ACIP-SM(=) manual Acip Cables, PLIM, and Connections

ACIP Description

For the ACIP, the signal must meet the worst case parameters listed in Table 4.

Table 4 ACIP SONET Signal Requirements

Parameter Multimode

PT–15

PR–28

PB–13

Multimode Power Budget Example with Sufficient Power for Transmission

The following is an example multimode power budget calculated based on the following variables:

•

•

•

•

•

Length of multimode link = 3 kilometers (km)

4connectors

3splices

Higher order loss (HOL) Clock recovery module (CRM)

Estimate the power budget as follows:

PB = 11.5 dB – 3 km (1.0 dB/km) – 4 (0.5 dB) – 3 (0.5 dB) – 0.5 dB (HOL) – 1 dB (CRM)

PB = 11.5 dB – 3 dB – 2 dB – 1.5 dB – 0.5 dB – 1 dB

PB = 3.5 dB

The value of 3.5 dB indicates that this link would have sufficient power for transmission.

Multimode Power Budget Example of Dispersion Limit

Following is an example with the same parameters as the previous example, but with a multimode link distance of 4 km:

PB = 11.5 dB – 4 km (1.0 dB/km) – 4 (0.5 dB) – 3 (0.5 dB) – 0.5 dB (HOL) – 1 dB (CRM)

PB = 11.5 dB – 4 dB – 2 dB – 1.5 dB – 0.5 dB – 1 dB

PB = 2.5 dB

The value of 2.5 dB indicates that this link would have sufficient power for transmission. But, because the dispersion limit on the link (4 km x 155.52 MHz > 500 MHzkm), this link would not work with multimode fiber. In this case, single-mode fiber would be the better choice.

ACIP Cables, PLIM, and Connections

An ACIP interface cable is used to connect your router to an ATM network. For SONET/SDH (STS-3C) multimode connections, use one multimode duplex SC-type connector (see Figure 2) or two single SC-type connectors. (See Figure 3.)

ATM Cable Interface Processor (ACIP) Installation and Configuration 7