Call forwarding is one of the features of the call coverage in Cisco CUCM. Call Hunting is when CUCM distributes a call on more than one Directory Number (DN), whether consecutively or simultaneously, depending on the algorithm. Hunt Pilot A Hunt Pilot is the entry point for the whole call hunting process. It is hit by a Call. The Hunt Pilot number is a dialable entity and has many similarities with Route Patterns : We can configure Route Filters with Hunt Pilots, Hunt Pilots can Provide Outside Dial Tone , We can set Hunt Pilots with the Urgent Priority flag, They can route or block calls, They can apply Calling and Called Party Transformations. Hunt Lists After hitting the Hunt Pilot, the call is presented by CUCM to the Hunt List. Each Hunt List contains one or more ordered Line Groups. A Hunt List can be pointed by one or more Hunt Pilots. Line Groups Each Line Group contains one or more member (we’ll refer to them as Hunt members, hunt parties or Line Group members). A Line Grou...
In this post, we will understand the nuances between the following concepts related to ISDN PRI: TDM links and interfaces T1, T1 PRI, E1, E1 PRI, ISDN BRI ISDN E1 PRI and ISDN T1 PRI E1 and T1 are two TDM technologies; they leverage Time Division Multiplexing to transmit and receive information. E1 TDM link provides a total 2.048 Mbps bandwidth. T1 TDM link provides a total 1.544 Mbps bandwidth. Both the E1 TDM and the T1 TDM links are segmented into channels, or timeslots. Each timeslot allows a bandwidth of 64 kbps. E1 TDM and T1 TDM have been used in the past to carry digitized voice. But since carrying voice and data is the same thing -from a transmission perspective- then T1 TDM and E1 TDM have been leveraged to carry data, voice and even video. E1 TDM, T1 TDM and WAN Protocols E1 TDM and T1 TDM can be used to carry PPP traffic. Also, E1 TDM and T1 TDM are used as a Link Layer transport protocol for ISDN PRI technology. That’s why we find in literature E1 PR...
This article is a series of IOS commands that deal with DSPs and PVDMs. To determine the type of PVDM in your router: show inventory Our router is using PVDM3-64. “show voice dsp”, “show voice dsp active” and “show voice dsp voice” “show voice dsp voice” For example, if you have a PVDM3-64 voice card, and you do a “show voice dsp voice”, you’ll get 64 lines, which correspond to 64 DSP voice channels. That’s the maximum allowed with this type of cards. Here is the output of the “show voice dsp voice” command, on a voice gateway: You notice that some channels are “busy” while other are “idle”. We’ve got 64 entries, so all channels of this DSP are used in voice termination. “show voice dsp” and “show voice dsp active” What if we want to see only active DSP voice channels? We can get that information with the command “show voice dsp” or ...
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