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This chapter describes cabling and configuration procedures for the LightStream 1010 ATM switch 622-Mbps port adapter module (PAM). When your switch leaves the factory, it is configured as specified in your order and is ready for installation and startup. As your communication requirements change, you might want to upgrade your system, add components, or change the initial configuration.
The following 622-Mbps PAMs are described in this chapter:
Software and upgrades require specific document part numbers and other frequently updated information; therefore, only basic software configuration guidelines are included in this publication. Detailed, up-to-date instructions are included in the LightStream 1010 ATM Switch Software Configuration Guide. Command-line interface (CLI) command descriptions are provided in the LightStream 1010 ATM Switch Command Reference publication.
This chapter contains the following sections:
For descriptions and examples of software configuration commands and the procedures for implementing them, refer to the LightStream 1010 ATM Switch Software Configuration Guide and the LightStream 1010 ATM Switch Command Reference publications.
The 622-Mbps Synchronous Optical Network (SONET) STS12/SDH STM4 PAM is used for intercampus or wide-area links (see Figure 4-1). The single port on the PAM can be configured as a redundant link using the switch routing protocols. The 622-Mbps PAMs support an SC-type connector. Receive and transmit LEDs give quick, visual indications of port status and operation. For detailed network management support, comprehensive statistics gathering and alarm monitoring capabilities are provided.
Each port on the PAM can be configured to support the following clocking options:
Traffic pacing allows the aggregate output traffic rate on any port to be set to a rate below the line rate. This feature is useful when communicating with a slow receiver or when connected to public networks with peak-rate tariffs.
The LightStream 1010 switch powers up automatically. All configuration information for PAM is saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This eliminates mandatory manual configuration.
The LightStream 1010 supports any PAM combination. You can configure your switch with only the number and type of interfaces required, with up to eight 622-Mbps interface ports.
The 622-Mbps SONET STS-12C/SDH STM4 PAMs are used for intercampus or wide-area links. Figure 4-2 shows an example of the 622-Mbps PAM applications.
The 622-Mbps PAMs provide the following ATM connections:
All ATM interfaces are full duplex. You must use the appropriate ATM interface cable to connect the ATM single-mode or multimode interface with an external ATM network.
This section describes the ATM connectors and the 622-Mbps PAM network connections
and LEDs.
For fiber-optic traffic over multimode, single-mode, or single-mode long-reach, use the SC-type connector to connect the 622-Mbps multimode PAM and 622-Mbps single-mode PAM with the external ATM switch. See the section "ATM Connection Equipment" in the chapter "Installing the LightStream 1010 ATM Switch PAMs" for a description of an SC-type connector.
The 622-Mbps PAMs provide an interface to ATM switching fabrics for transmitting and receiving data at up to 622 Mbps bidirectionally. The PAM LEDs provide status information for the individual interface connections and attached cable.
The ATM PAM can support interfaces that connect to the following physical layers:
Connect the ATM interface cables as shown in Figure 4-3. For descriptions of ATM cabling requirements, refer to the section "ATM Connection Equipment" in the chapter "Installing the LightStream 1010 ATM Switch PAMs."
 | Caution If attaching a short cable to the OC12, 622-Mbps long-reach PAM, you must add 10 decibels per milliwatt (dBm) of attenuation in the line or the transmitter can overdrive the receiver and introduce data errors. |
The LEDs provide status information for the individual 622-Mbps single-mode and multimode fiber-optic connections. The LEDs are described in Table 4-1 and shown in Figure 4-3.
| LED | Description |
|---|---|
Off---Carrier detect signal not received | |
Off---Administration down | |
Off---No transmit line activity |
| 1LOF = loss of frame. 2LCD = loss of cell delineation. 3AIS = alarm indication signal. 4FERF = far-end receive failure. |
When the switch is powered on without any previous configuration data, the ATM interfaces are configured automatically on the physical ports. ILMI and the physical card type are used to automatically derive the ATM interface type, UNI version, maximum VPI and VCI bits, ATM interface side, and ATM UNI type.
When you hot swap a carrier module (CM) or PAM, the configuration for the initially installed PAM interface configuration is saved. If the same type of PAM is reinstalled, no additional configuration is needed and the initial configuration is reestablished.
The interface configuration is described in the following section, "Default ATM Interface Configuration Without Autoconfiguration."
If ILMI is disabled or if the connecting end node is not supporting ILMI, the following defaults are assigned to all 622-Mbps interfaces:
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