CME Basic Setup

Background Info: Files in Router Flash for CME to work properly Cisco IOS: CME version depends on the IOS file version you installed. Refer to CME and IOS Version Compatibility Matrix for identifying the correct IOS version to download. Normally, IOS already includes the phone firmware for most phone model to work properly. CME Basic …

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CME 7.1 emulation using 7200 Router in GNS3

Background Info:Reasons to use ISR 7200:According to below URL, it is recommended to use 7200 router in GNS with IOS 12.4(24)T which enables you to simulate CME version 7.x, while all other routers with 12.4(15)T allow you to access CME 4.x and older versions.Emulating CME 7.x in GNS3Only 7206 out of 7200 series Routers can …

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Cisco CUCM Trace Collection using RTMT

CUCM Trace Types & Prerequisites for Trace CollectionTrace Types: There are 2 kinds of trace to collect for CUCM troubleshooting; SDI (System Diagnostic Interface) and SDL (Signal Distribution Layer).SDI Trace: mostly used by general voice engineers for troubleshooting the majority of CUCM issues. Plus, it is easier to understand than SDL.SDL Trace: consists of large …

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Evolution of Avaya Telephony Solution

Avaya DEFINITY Telephony System Avaya DEFINITY portfolios are Avaya’s Pure TDM Telephony products in the form of cabinet with one or several carriers which consists of several slots for different type of Hardware Cards. Both Control Messages (CCMS) and Bearer traffic are all transported in TDM channels. Besides, all Hardware Cards in one cabinet, regardless …

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QSIG–At a Glance

QSIG Overview QSIG is originally developed by ECMA International, aiming to facilitate the interoperation among the communication platform from disparate vendors. QSIG has two layers, called BC (basic call) and GF (generic function). QSIG BC describes how to set up calls between PBXs. QSIG GF provides supplementary services such as line identification, call intrusion and …

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High Availability between CUCM and H.323 Gateway

This post describes in great details about how to configure redundancy and customize relevant parameters between CUCM and H.323 Gateway. The following content can be divided into 2 sections: Redundancy configuration on CUCM side, dial-peer & timer configuration on H.323 Gateway side. Redundancy Configuration on CUCM side: Route Group Config: Add several gateways into Route …

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SIP NAT Traverse

NAT种类 静态NAT:内网IP与公网IP手动的实现静态绑定,永久生效,多用于公网IP地址多到能与内网主机实现一一对应的静态绑定的情形。 动态NAT:在内网主机向外网发起连接请求时,NAT从公网IP Pool中临时的选择一公网IP与其绑定,待连接结束或连接长时间无响应时,该绑定自动解除。动态NAT分为两大类,若内网主机使用同一内网IP和同一端口号向外网同时发起多个连接时,NAT为所有连接绑定的公网IP和端口号均相同,则属于非对称NAT;若每一个连接所对应的公网IP相同,但公网端口号不同,则属于对称NAT。

WAN Aggregator QoS Design

This section discusses WAN QoS considerations and designs, including the following: • Slow-speed (≤ 768 kbps) WAN link design • Medium-speed (768 kbps to T1/E1 speed) WAN link design • High-speed (> T1/E1 speed) WAN link design

QoS Design

QoS Design Principles: One design principle is to always enable QoS policies in hardware rather than software whenever a choice exists as QoS in software places incremental loads on CPU. Classification and Marking Principles: In order to provide end-to-end Differentiated Services and PHBs, Cisco recommends to classify and mark applications as close to their sources …

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