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This chapter describes cabling and configuration procedures for the LightStream 1010 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.
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.
This chapter contains the following sections:
The DS-3 PAM and the E3 PAMs are used for wide-area connectivity, to link multiple campuses, or to connect to public networks (see Figure 5-1). The ports on the PAM can be set up as redundant links, which are used by the LightStream 1010 routing protocols.
Each port on the DS-3/E3 PAMs 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 discovered automatically 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 32 DS-3 or E3 interface ports.
The DS-3 and E3 PAMs are used for intercampus (LAN) or enterprise WAN links. Figure 5-2 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.
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 PAM'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 a 75-ohm RG-59 coaxial cable with bayonet-style twist-lock (BNC) connectors. The PAM connectors are shown in Figure 5-3. See the section "ATM Connection Equipment" in the chapter "Installing the LightStream 1010 ATM Switch PAMs" for a description of a BNC connector and coaxial cabling.
The LEDs provide status information for the individual DS-3 and E3 interface connections. The LEDs are shown in Figure 5-3 and described in Table 5-1.
| 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 on 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 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 DS-3 or E3 interfaces:
The following PAM types have specific defaults assigned:
DS-3 PAM:
E3 PAM:
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