Author: CyberSecFaith

CCNA Voice Summary – Part 4

Circuit Switched Network Involves 2 nodes that establish a dedicated circuit in order to communicate. The channel remains up during the whole conversation. PSTN is the largest Circuit switched network in the world. The PSTN uses SS7 signaling. Advantages: Dedicated Channel; Excellent quality; delay and bit rate is constant Disadvantages: Not always enough available channels; … Continue reading CCNA Voice Summary – Part 4 →

CCNA Voice Summary – Part 3

Digital Connectivity Problems with Analog connectivity: Distance limitation – regeneration of the signal also leads to regeneration of the white noise Wiring requirements – Analog requires a tip and ring wire for each call – that makes it 2 wires for each call. These problems are overcome by digital signals. Digital signals converts the signals … Continue reading CCNA Voice Summary – Part 3 →

CCNA Voice Summary – Part 2

Analog Connectivity Analog transmission – using some property of the transmission media to convey a signal. As you speak into an analog phone, the voice is converted into electricity. Analog transmission uses the properties of electricity to transmit signals.  Analog signaling: Loop start. The phone has 2 connections – tip and ring. When the phone … Continue reading CCNA Voice Summary – Part 2 →

CCNA Voice Summary – Part 1

Introduction to VoIP Why Use VOIP Cost Savings: reduced wiring - one single cable for both phone and computer; reduced telecommuter costs since they connect to the HQ via internet; Free long distance between branches and HQ; Single inbox for voicemail, fax and email using unity connection; Saves office space using extension mobility; Open architecture … Continue reading CCNA Voice Summary – Part 1 →

Cisco VoIP: How to configure Basic Telephony on a Brand new Cisco Call Manager Express (CME )

** Enable Telephony Service G00-2921-01#conf t G00-2921-01(config)#telephony-service ** Configure CME source address G00-2921-01(config)#telephony-service G00-2921-01(config-telephony)#ip source-address 10.1.222.254 G00-2921-01(config-telephony)#end ** Configure Max ephones and DNs G00-2921-01#conf t Enter configuration commands, one per line. End with CNTL/Z. G00-2921-01(config)#telephony-service G00-2921-01(config-telephony)#max-ephones 25 PLEASE READ THE FOLLOWING TERMS CAREFULLY. INSTALLING THE LICENSE OR LICENSE KEY PROVIDED FOR ANY CISCO PRODUCT FEATURE … Continue reading Cisco VoIP: How to configure Basic Telephony on a Brand new Cisco Call Manager Express (CME ) →

Cisco R&S: Basic DHCP Configuration on a Cisco Router

Configure Excluded IPs for the 3 VLANS ip dhcp excluded-address 10.1.222.250 10.1.222.254 ip dhcp excluded-address 10.1.0.1 10.1.0.100 ip dhcp excluded-address 10.1.0.200 10.1.0.254 ip dhcp excluded-address 10.1.1.250 10.1.1.254 Configure Voice Pools ip dhcp pool VOICE_VLAN network 10.1.222.0 255.255.255.0 option 150 ip 10.1.222.254 default-router 10.1.222.254 lease 30 ip dhcp pool DATA_VLAN network 10.1.0.0 255.255.255.0 default-router 10.1.0.254 lease … Continue reading Cisco R&S: Basic DHCP Configuration on a Cisco Router →

Cisco Wireless: How to configure Multiple SSIDs on CISCO AP1141

hostname AP00-1141-01 ! Enable aaa to use local authentication aaa new-model aaa authentication login default local aaa session-id common ! Configure domain name no ip domain lookup ip domain name me.com ! dot11 mbssid dot11 syslog dot11 vlan-name data_wifi vlan 39 dot11 vlan-name visitor_wifi vlan 40 ! dot11 ssid Data vlan 39 authentication open authentication … Continue reading Cisco Wireless: How to configure Multiple SSIDs on CISCO AP1141 →