Circuit Emulation over IP Network Modules. DATA SHEET. Figure 1. Four Port T1E1 Circuit Emulation Network Module NM CEM 4. TE1 Figure 2. Four Port Serial Circuit Emulation Network Module NM CEM 4. SER. Circuit Emulation over IP CEo. IP network modules product numbers NM CEM 4. TE1 and NM CEM 4. SER for the Cisco. XM, 2. 69. 1, 2. 81. CEo. IP service offering. These network modules provide bit transparent data transport that is completely protocol independent. For the first time, this allows network administrators to take advantage of their existing IP network to provide leased line emulation services, or to carry data streams or protocols that do not meet the format requirements of other multiservice platform interfaces. APPLICATIONS. These two new network modules are the first Cisco router interfaces designed to meet the emerging standards for CEo. IP. All previous Cisco router interfaces require that data be presented in the form of. Native IP frames Frame Relay frames High Level Data Link Control HDLC frames ATM cells Channelized pulse code modulation PCM voice Asynchronous startstop data. These new network modules do not assume that data has. Panini Contenders Draft Picks Baseball checklist details, hobby box breakdown, release date and more for the prospect and autographfocused release. Purple/v4/5d/d1/4f/5dd14fa9-74d4-2cd4-1b82-e2b7935b2e41/screen800x500.jpeg' alt='Draft It Pro Serial' title='Draft It Pro Serial' />They simply regard the data as an arbitrary bit stream. All data bits are simply transported to a defined destination encapsulated in IP packets. This transparency, for the first time, allows an IP network to carry the variety of data applications and protocols that do not meet the requirements of other router interfaces. View and Download HP Officejet Pro 8100 user manual online. HP Officejet Pro 8100 User Guide. Officejet Pro 8100 Printer pdf manual download. With the 428th pick in the 1974 NFL draft, the Green Bay Packers selected. U. S. history. Such applications, shown in Figure 3, might include. Pre encrypted data for government, defense, or other high security applications Proprietary synchronous or asynchronous data protocols used in transportation, utilities, and other industries Leased line emulation service offerings in metropolitan metro ethernet or wide area network service provider environments Figure 3. CEo. IP Application Examples FEATURES AT A GLANCE Emerging standards based CEo. IP based on Vainshtein draft with enhancements Configurable using Cisco IOS software Four T1E1 ports per T1E1 network module Four synchronous serial ports per serial network module Interworking between the T1E1 and serial network modules Bit transparent data transport Protocol independent data transport IP transport using Real Time Transport Protocol RTP and User. Datagram Protocol UDP protocol stack IP quality of Service Qo. S using differentiated services code point DSCP or type of service To. S and IP Precedence Configurable payload size Optional payload compression Optional data protection Adaptive clock synthesis Configurable egress de jitter buffers up to 5. Draft It Pro Serial' title='Draft It Pro Serial' />Configurable idle pattern Online insertion and removal OIR supported on Cisco 3. Cisco 3. 74. 5 platforms Overall network module status LEDs Per port status LEDs Additional Features of the NM CEM 4. TE1 Unframed unstructured T1E1 transport N x 6. N x 5. 6 kbps framed T1 transport N x 6. E1 transport Grooming of up to 2. T1 or 3. 1 E1 separate data streams, each able to terminate on a separate network destination Optional channel associated signaling CAS transport Configurable clock source for each port T1E1 line diagnostic loopbacks local line, local payload, and network payload Additional Features of the NM CEM 4. SER Serial data rates from 2. Optional serial control lead transport Optional extended serial control lead support Configurable serial control lead sampling Serial control lead programming Optional data strobe configuration Configurable clock mode for each port Configurable clock source for each port Serial port loopbacks local and network Asynchronous data support with over sampling Support of RFC 1. MIB for T1E1 performance monitoring FEATURE DETAILS Protocol Independent Data Transport. These network modules provide completely bit transparent, bidirectional, point to point data transport. Every bit presented to an ingress port is transported unchanged to the corresponding egress port by encapsulating the data bits into an IP packet for transport across an IP network. The data ports do not care about the structure or content of the data stream. Consequently, these network modules are ideally suited to transport data streams that are not suited to be carried using other platform interfaces. Such data streams might include. Leased line emulation services Encrypted data Data protocols that cannot easily be migrated to native IP, ATM, Frame Relay, HDLC, etc. Data Integrity. Because these network modules do not consider the content of any circuit emulation data stream, it is important to engineer the transport network in such a way as to minimize the risk of losing any data packets. To that end, these network modules support a variety of Qo. S mechanisms, including IP DSCP, IP To. S, and IP Precedence. To ensure that a data stream is delivered, without gaps, to the destination customer premises equipment CPE, data packets are held in a de jitter buffer at the destination port to eliminate any delay variation that is, jitter experienced by successive packets traveling through the network. The. de jitter buffer is user configurable up to 5. For a measure of added safety, the network modules support a data protection feature based on RFC 2. This feature guarantees that no data is lost in the event of any nonconsecutive packets being dropped or excessively delayed in the IP network. Flexibility in Delay vs. Overhead. Each packet created by these network modules carries a 4. A 2. 0 byte IP header An 8 byte UDP header A 1. RTP header A 4 byte circuit emulation header. However, these network modules support a wide variety of payload sizes from 1 byte for very low speed data streams to 1. This provides the user the ability to control the overall efficiency as well as the end to end delay of the system by controlling the packetizing delay. Naturally, large packets introduce more packetizing delay but generate fewer packets per second with correspondingly lower packet overhead. Payload Compression and c. RTP to Increase Efficiency. In networks where bandwidth optimization is of premium importance, these network modules support both payload and header compression, independently of each other. Both compression algorithms are optional. The payload compression is implemented on the network modules using the Lempel Zif Stac LZS algorithm. Snes Alien 3 Game Genie Codes there. Naturally, the overall compression efficiency is a function of the data in the transmitted data stream. The header compression is implemented on the host platform using compressed RTP c. RTP to compress the 4. Clocking Flexibility. In order to achieve bit transparent circuit emulation without bit errors, it is imperative that both endpoints of the circuit use the same bit clock frequency. Figure 4. Synchronization with a Common Clock. One way to accomplish this is to externally synchronize both end devices with a common clock source, as shown in Figure 4. An alternative is to use an adaptive clock at the slave end of the circuit, as shown if Figure 5. Figure 5. Synchronization With Adaptive Clock. The adaptive clock is a locally synthesized clock frequency that is tuned to match the master clock applied to either the source CPE or the source router. These network modules provide the option to generate an adaptive clock based on the average amount of data in the egress de jitter buffer of the data stream.