CVOICE Chapter8 まとめ Part1

- Gatekeepers are optional devices that are responsible for admission control, zone management, and E.164 address translation

- The gatekeeper hardware and software requirements depend on the Cisco IOS version and feature set.

- Signaling between a gateway and a gatekeeper is done through H.225 RAS.

- Zone prefixes indicate the destination zone for a call.

- Technology prefixes are used by gatekeepers to be more flexible in call routing. Difault technology prefixes are used as a gateway of last resort.

- A gatekeeper has a logical process for call routing that depends on techology prefix and zone prefix matching.

- Directory gatekeepers can intelligently forward LRQs to appropriate gatekeepers. These directory gatekeepers are used for eliminating the requirement for fully meshed gatekeeper networks.

- GKTMP provides an interface for call control of a gatekeeper.

- A single gatekeeper can manage multiple local and remote zones.

CVOICE Chapter7 まとめ Part2

- Dial peers in a hunt group are selected according to criteria such as longest match, explicit preference, or random selection.

- Best practices include a default POTS dial peer and redundant Cisco UCM.

- When remote sites are involved, different path selection strategies are required, including site-code dialing, toll-bypass, and TEHO.

- Site-code dialing uses the concept of prefixing a site code in front of the actual extension and can be combined with toll-bypass to route calls over a WAN link instead of a PSTN connection.

- TEHO extends the concept of toll-bypass by routing calls over a WAN to the closest PSTN breakout to avoid costly long-distance and international phone charges.

- Site -code configuration requires that each site be assigned a unique site code.

- TEHO configuration requires that all calls be routed over the WAN unless the WAN is down.

- Calling privileges are used within a dial plan to define the destination a user is allowed to call.

- Calling privileges are implemented on Cisco IOS gateways using the Class of Restriction freature.

- For Cisco Unified CME, a corlist is directly assigned to an appropriate ephone. To assign a corlist in SRST mode, a corlist is matched to a range of directory numbers in Communications Manager fallback configuration mode.

- Configuring COR includes configuring named CORs and corlist, and assigning corlists to dial peers, ephones, or SRST.

CVOICE Chapter7 まとめ Part1

- Digit manipulation is the task of adding or subtracting digits from the original dialed number to accommodate user dialing habits or gateway needs.

- Digit stripping strips any outbound digits that explicitly match the destination pattern of a particular dial peer.

- Digit forwarding specifies the number of digits that must be forwarded to a telephony interface.

- Digit prefixing adds digits to the front of the dial string before it is forwarded to a telephony interface.

- Number expansion is applied globally to all calls, not just to calls matching a single designated dial peer.

- By default, when a terminating router matches a dial string to an outbound POTS dial peer, the router strips off the left-justified digits that explicitly match the destination pattern.

- You can use the clid command to modify caller ID information.

- You can use voice translation profiles to replacethe Cisco Unified CME dialplan-pattern command.

- Configuring digit manipulation might require the use of basic commands as well as translation rules and profiles.

- The call routing logic on Cisco IOS routers using the H.323 protocol relies on the dial peer construct.

- Routers must match the correct inbound and outbound dial peers to successfully complete a call.

CIPT1(Cisco Press)読破

主に土日しか読んでいなくて、だらだらと１ヶ月もかけて読破した。読破したといいながら消化不良感がたっぷり。ほぼUCのマニュアルなので全然おもしろくない本だったのは内緒。細かな操作方法はさて置きどのようなことができるかについて知るぐらいのレベルで眺めてました。

Cisco Pressと同時にon-demand lessonもやっていて、それも今月中には見終わることになっている。

次はCIPT2でこれもだらだら読むつもりだが、たぶん年内には読み終われるだろう。

CVOICE Chapter6 まとめ

- A dial plan defines how calls are interconnected and routed.

- Endpoint addressing assigns directory numbers to endpoints.

- Call routing and path selection define where a call is routed to and usually depends on the called party number.

- The digit manipulations feature ensures that numbers are presented in the correct format and is closely connected to call routing.

- Calling privileeges define the destinations a user can dial.

- Call coverage endsures that incoming calls are not lost.

- Several factors must be considered when designing a scalable dial plan.

- Interworking with the PSTN requires appropriate call routing and digit manipulation.

- Digit manipulation based on a TON and numbering plan is required for ISDN networks.

- Configuring a PSTN dial plan includes configuration of digit manipulation, inbound dial peer, inbound dial-peer matching, and outbound dial-peer matching.

- Verify correct dial-peer matching and digit manipulation using show and debug commands.

- Numbering palans define telephone numbers for voice endpoints and applications, whereas dial plans define call routing and digit manipulation.

- Scalable telephony networks require telephone numbering plans that are hierarchical.

- Overlapping number ranges are addressed through the use of site access codes.
- Varying number lengths, specialized services, voice mail, necessity of prefixes or area
codes, and international dialing considerations are challenges associated with integrating a private numbering plan with a public numbering plan.

- Digit manipulation and number normalization are methods to extend and enhance VoIP numbering plans.

- Implementing a numbering plan requires that the design process includes enumerating current users at each location and evaluating future growth requirements.