User manual RANE NM 48

[. . . ] OPERATORS MANUAL NM 48 NETWORK PREAMPLIFIER Quick Start Ok, if you've read the NM 84 manual you might get a sense of déjà vu when you read this one. Maybe not quite as strong as if you were watching another Adam Sandler movie, but déjà vu just the same. The reason for the similarity is that the complicated stuff (network design) is such a large part of the installation. First, design the network ­ a dedicated network for CobraNet audio is recommended, but not required when using switch-based networks. [. . . ] Multicast networks/ Bundles can be transported over repeater hubs or over switches; Unicast networks/Bundles require using switches. Although the Network Hardware (Table 2) and the CobraNet Bundle (Table 1) are similar, they are listed separately since, for example, multicast data can be transmitted over repeater hubs or switches. Thus listing them separately allows you to determine which approach is best for your given application. When observing the indicators on switch ports for CobraNet devices, Rane NM devices appear as full duplex devices. ("Rave" devices ­ available from our friends at QSC Audio ­ appear as half duplex; this may change however, so check with QSC. ) A Few Words About Networks The opening primer in the Quick Start about designing a network makes it sound so easy ­ and it is, relatively ­ but it's like using three sentences to say design a sound system for a building. Networks and Ethernet may be new to audio folks, but they're old news to computer types. Here are a few good places on the Internet for more information on these subjects: · Rane's main "network help" links page: www. rane. com/ethernet. html · Network Design: www. peakaudio. com/cobranet/network_design. htm The folks at Peak Audio are, obviously, an invaluable resource for CobraNet information. Do not underestimate their interest in the success of your designs or their willingness to help with network design or the myriad questions that arise. · John's Closet - A down-to-earth set of networking howto's: www. johnscloset. net · Ethernet Tutorial - A wonderful tutorial in plain English from Lantronix: www. lantronix. com/training/tutorials · Network Design Tutorials & Other Resources - An industrial-strength link list of networking topics: www. alaska. net/~research/Net/nwpages. htm · Ethernet Information - Network Basics / Cabling: www. helmig. com/j_helmig/basics. htm Manual-8 Bundle number 0 (Off) (hex: $00) 1 through 255 (hex: $0001 through $00FF) Designation Null Description Transmission disabled. Unused channel, i. e. , Off. Advantages Perfect for muting audio and saving network bandwidth. Disadvantages Muted audio never arrives at any destination and is nearly impossible to hear. Multicast Bundle Multicast. All CobraNet Allows an unlimited number devices can transmit & of receivers per transmission receive data through with no additional network Multicast Bundles. Only 32 Multicast Bundles allowed per [On a CobraNet network, all VLAN when using CobraNet and non-CobraNet devices, managed switches. such as repeater hubs, receive all Swamps all 10 Mbit ports Multicast data. ] on the network. Do not mix computer data and CobraNet data on a repeater network. ] 256 through 65, 279 (hex: $0100 through $FEFF) Unicast Bundle There is no fixed maximum Unicast (i. e. , point-topoint) data transmission. Computer work, Unicast Bundles can be data and CobraNet data can setup as multicast - this does more efficiently and reliably not mean you'll ever need to exist on the same network. This is also why Greatly improves network Multicast Bundles exist. ] data throughput and efficiency since data is only passed from point to point and not to every network device. Allows 10 Mbit ports (such as the Rane Via 10). Cannot send one device's audio to more than one other device without using a second independent Bundle. [The NM 84 allows the same 8 Audio Channels to be transmitted on up to 4 different Bundles - which is the maximum allowable by CobraNet devices. ] Table 1. CobraNet Bundles Network Examples There are two ways to transmit CobraNet audio across a network. broadcast] requiring simpler repeater hubs One way to transmit audio over the network is to allow all of a device's audio channels to be transmitted to all devices. This is called multicast in network lingo and can be thought of using the more familiar term: broadcast. Thus, when you transmit audio using one of the Multicast Bundles (Bundles 1 through 255), the audio is broadcast to every device on the network. [. . . ] A repeater hub does not buffer or interpret the data passing through it. If data signals arrive simultaneously from multiple ports, a collision condition is recognized by the hub and a special jam signal is transmitted out all ports. Repeater Network ­ A network built with one or more Repeater Hubs. Switched Network ­ A network built with one or more Switching Hubs. [. . . ]