Cisco Systems 15310-MA manual RJ-11 Pin Number Description

Chapter 1 Cisco ONS 15310-MA SDH Shelf Assembly Hardware

Fan-Tray Assembly

and small hub-and-spoke configurations. Keep in mind that orderwire is not protected in ring topologies such as multiplex section-shared protection ring (MS-SPRing) and subnetwork connection protection (SNCP).

Note The Cisco ONS 15310-MA SDH Orderwire functionality is compatible with Cisco ONS 15454 Orderwire functionality.

Caution Do not configure orderwire loops. Orderwire loops cause feedback that disables the orderwire channel.

The ONS 15310-MA SDH implementation of both local and express orderwire is broadcast in nature. The line acts as a party line. Anyone who picks up the orderwire channel can communicate with all other participants on the connected orderwire subnetwork. The local orderwire party line is separate from the express orderwire party line. Up to four STM-N facilities for each local and express orderwire are provisionable as orderwire paths.

The FTA supports selective dual tone multifrequency (DTMF) dialing for telephony connectivity, which causes specific or all ONS 15310-MA SDH FTAs on the orderwire subnetwork to “ring.” The ringer/buzzer resides on the FTA. There is also a “ring” LED that mimics the FTA ringer. It flashes when a call is received on the orderwire subnetwork. A party line call is initiated by pressing *0000 on the DTMF pad.

The orderwire ports are standard RJ-11 receptacles. The pins on the orderwire ports correspond to the tip and ring orderwire assignments.

Table 1-9describes the orderwire pin assignments.

Table 1-9	Orderwire Pin Assignments
RJ-11 Pin Number		Description
1		Four-wire receive ring
2		Four-wire transmit tip
3		Two-wire ring
4		Two-wire tip
5		Four-wire transmit ring
6		Four-wire receive tip

When provisioning the orderwire subnetwork, make sure that an orderwire loop does not exist. Loops cause oscillation and an unusable orderwire channel.

Figure 1-14shows the standard RJ-11 connectors used for orderwire ports. Use a shielded RJ-11 cable.

Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2

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