By Kevin Wallace
ISBN-10: 1587055546
ISBN-13: 9781587055546
I've got my ccnp and ccna instant, so i have been via 6 different ciscopress books. althoug this ccvp e-book is fine, it rambles over an analogous topics method too lengthy. i will not understand if it truly is on the right track for the attempt till i take the attempt, yet thus far it kind of feels mediocre in comparison to the opposite ciscopress books i have received.
Read or Download Authorized self-study guide: Cisco Voice over IP PDF
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Extra info for Authorized self-study guide: Cisco Voice over IP
Example text
However, VoIP signaling protocols use different architectures and procedures to achieve this goal. 323 is not a single protocol. Rather, it is a suite of protocols. The necessary gateway configuration is relatively complex, because you need to define the dial plan and route patterns directly on the gateway. 323-capable devices are the Cisco VG224 Analog Phone Gateway and the Cisco 2600XM Series, Cisco 2800 Series, 3700 Series, and 3800 Series routers. 323 gateway. 931, are used only on the Integrated Services Digital Network (ISDN) link to the PSTN, as illustrated in Figure 1-2.
IP telephony gateways should meet these core feature requirements: ■ Gateway protocol support: Cisco voice gateways support various signaling protocols, depending on the hardware platform. 323, MGCP, SIP, and SCCP. 323 and SIP gateways do not need a call control agent. Therefore, they can be deployed on networks in which call agents, such as Cisco UCM, are not present. MGCP and SCCP are streamlined protocols that work only on a network in which a call agent, such as Cisco UCM, is present. Cisco IP Phones use SCCP, which is a lighter-weight protocol.
Chapter 1: Introducing Voice over IP Networks Figure 1-18 Cisco VG248 Cisco AS5300 Series Universal Gateways The Cisco AS5300 Series, an example of which is provided in Figure 1-19, is a series of access servers that includes the Cisco AS5350 Universal Gateway and the Cisco AS5350XM Universal Gateway. The AS5350XM Universal Gateway doubles the performance of the Cisco AS5350 Universal Gateway, allowing the same applications to run faster and with lower CPU utilization levels. com/go/as5300 to learn more about the Cisco AS5300 Series Universal Gateways.