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This chapter describes cabling and configuration procedures for the LightStream 1010 asynchronous transfer mode (ATM) switch DS-3 and E3 port adapter modules (PAMs). 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 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.
There are two kinds of replaceable system components: those that support hot-swapping and those that require you to shut down the system power before you replace them. Redundant power supplies, carrier modules (CMs), PAMs, and the fan assembly can be replaced while the system is operating.
This chapter contains the following information:
The DS-3 Port Adapter Module (shown in Figure 6-1) and the E3 PAMs are ideal for wide-area connectivity, to link multiple campuses, or to connect to public networks. The ports on the PAM can be set up as redundant links, which are exploited by the sophisticated LightStream 1010 routing protocols.
Each of the ports 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 is useful when communicating with a slow receiver or when connected to public networks with peak rate tariffs.
The plug-and-play mechanisms of the LightStream 1010 allow the switch to come up automatically. All configuration information for port adapter modules can be 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 combination of port adapter modules. Customers can configure their switches with only the number and type of interfaces required, with up to 32 DS-3 or E3 interface ports.
This section describes the following:
The DS-3 and E3 PAMs provide the following features:
The DS-3 and E3 Port Adapter Modules are ideal for intercampus or workgroup links. Figure 6-2 is an example of the DS-3 PAM applications.
The various DS-3 and E3 PAMs can be used to provide intercampus ATM connections.
All ATM interfaces are full duplex. You must use the appropriate ATM interface cable to connect the ATM DS-3 or E3 PAM interface with an external ATM network.
This section describes the following:
The DS-3 and E3 PAMs provide an interface to ATM switching fabrics for transmitting and receiving data at up to 45-Mbps (DS-3) or 34-Mbps (E3) bidirectionally. The PAM LEDs provide status information for the port adapter module's individual interface connections.
 | Caution The DS-3 and E3 ports must be connected to NT1 devices. |
The ATM PAM can support interfaces that connect to the following physical layers:
To connect the DS-3 PAM and E3 PAM to an external ATM network, use 75-ohm RG-59 coaxial cable with bayonet-style twist-lock (BNC) connectors. The PAM connectors are shown in Figure 6-3. See the section "Preparing Network Connections" in the chapter "Preparing for Installation" for a description of a BNC connectors and coaxial cabling.
The LEDs provide status information for the port adapter module's individual DS-3 and E3 interface connections. The LEDs are shown in Figure 6-3 and described in Table 6-1.
| LED | Description |
|---|---|
Off---Carrier detect signal not received | |
Off---LOS1 or shutdown | |
Off---No transmit line activity |
| 1LOS = loss of signal 2LOF = loss of frame 3LCD = loss of cell delineation 4AIS = alarm indication signal 5FERF = far-end receive failure |
When the switch is powered without any previous configuration data, the ATM interfaces are automatically configured on the physical ports. ILMI and the physical card type are used to automatically derive the ATM interface type, UNI version, maximum virtual path identifier (VPI) and virtual channel identifier (VCI) bits, ATM interface side, and ATM UNI type.
When you hot-swap a CM or PAM, the configuration for the initially installed PAM interface configuration is saved and, if the same type of PAM is reinstalled, no additional configuration is needed and the initial configuration will be reestablished.
The interface configuration is described in the section "Default ATM Interface Configuration Without Autoconfiguration."
If ILMI has been disabled or if the connecting end node does not support ILMI, the following defaults are assigned to all DS-3 or E3 interfaces:
The following PAM types have specific defaults assigned:
DS-3 PAM:
E3 PAM:
This concludes the explanation of the DS-3 and E3 port adapter module cabling and configuration.
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