What is srst in cisco
Cisco Unified Survivable Remote Site Telephony Data Sheet
Cisco Unified Survivable Remote Site Telephony (SRST) offers: Business resiliency through redundant, localized call processing Intelligent and automatic failover configuration without . 3 rows · Dec 20, · This chapter describes Cisco Unified Survivable Remote Site Telephony (Cisco Unified SRST).
It also includes information about support for Cisco Unified IP Phones and Platforms, specifications, features, prerequisites, restrictions and where to find additional reference documents. The system automatically detects a failure and uses Simple Network Auto Provisioning SNAP technology to autoconfigure the branch office router to provide call processing for Cisco Unified IP phones that are registered with the router.
The Settings menu supports a maximum of five default router entries; however, Cisco Unified CM accommodates a maximum of three entries. Other Cisco Unified IP phones on the network remain out of service until they re-establish a connection with their primary, secondary, or tertiary Cisco Unified CM. Typically, it takes three times the keepalive period for a phone to discover that its connection to Cisco Unified CM has failed.
The default keepalive period is 30 seconds. Otherwise, the phone activates a standby connection to its secondary Cisco Unified CM. Phones such as the CiscoCiscoand Cisco can take approximately 2. Generally, the default time that Cisco Unified IP phones wait before attempting to re-establish a connection to a remote Cisco Unified CM is seconds. A Cisco Unified IP phone cannot re-establish a connection with the primary Cisco Unified CM at the central office if it is currently engaged in an active call.
Call preservation may work with the no h timeout keepalive command. Under default configuration, the H. To disable this behavior and help preserve existing calls from local Cisco Unified IP phones, you can use the no h timeout keepalive command.
Disabling the keepalive mechanism only affects calls that will be torn down as a result of the loss of the H. For information regarding disconnecting a call when an inactive condition is detected, see the Media Inactive Call Detection document.
Contact your account representative if you have further questions. To obtain an account on Cisco. Integration is performed from Cisco Unified Communications Manager. See the. Procedure selection depends on the Cisco Unified How to split items in gw2 Manager version that you have.
If you have Cisco Communications Manager V3. In the Find and List Phones page, click Find. As a result, those calls will not get routed to the original caller.
The extension numbers of callers can be translated to only two emergency location identification numbers ELINs for each emergency response location ERL. There are a number of other ways that your configuration of Enhanced What is wma audiobook format can what is a hi ball with existing Cisco Unified SRST features and cause unexpected behavior. VoIP H. If you are in one of the states in the United States of America where there is a regulatory requirement for CAMA trunks to interface to emergency services, and you would like to connect more than 48 Cisco Unified IP phones to the Cisco multiservice routers in your network, contact your local Cisco account team for help in understanding and meeting the CAMA regulatory requirements.
The two types of interfaces available on a Cisco router include the physical interface and the virtual interface. The types how long do leftovers keep physical interfaces available on a router depend on its interface processors or port adapters.
Virtual interfaces are software-based interfaces that you create in the memory of the networking device using Cisco IOS commands. With Cisco IOS earlier than With Cisco IOS releases after How to become a grandmaster in chess commands listed above are ineffective unless both commands are configured.
For instance, your configuration will not work if you only configure the ccm-manager fallback-mgcp command. IPv6 uses packets to exchange data, voice, and video traffic over digital networks.
Also, IPv6 increases the number of network address bits from 32 bits in IPv4 to bits. If you do not have a dual-stack configuration, configure the CLI command call service stop under voice service voip configuration mode before changing to dual-stack mode.
For an example of switching to dual-stack mode, see. IPv6 option only appears if protocol mode is dual-stack configured under sip-ua configuration mode or IPv6. For more information on licenses, see Licensing, page Allows phones to interact with phones on IPv6 voice gateways. You can configure phones for IPv4 addresses, IPv6 address es, or for a dual-stack mode. Enters voice register pool configuration mode to set phone-specific parameters for a SIP phone.
Explicitly identifies a locally available individual SIP phone to support a degree of authentication. An account on Cisco. Support for Cisco VG Version 1. For the most up-to-date information about Platform and Memory Support, see Compatibility Information.
Cisco IOS software is packaged in feature sets that are supported on specific platforms. To get updated information regarding platform support for this feature, access Cisco Feature Navigator. Cisco Feature Navigator dynamically updates the list of supported platforms as new platform support is added for the feature. Platform support for particular Cisco IOS software releases is dependent on the availability of the software images for those platforms. Software images for some platforms may be deferred, delayed, or changed without prior notice.
For updated information about platform support and availability of software images for each Cisco IOS software release, see the online release notes or, if supported, Cisco Feature Navigator. Cisco SRST 3. A Unified SRST router that is configured for multicast MOH also transmits the audio stream on the physical IP interfaces of the specified router to permit access to the stream by external devices.
You can disable multicast MOH to individual phones that do not support multicast. Callers hear a repeating tone when they are placed on hold. Support is offered for G. If you specify a file with this command and later want to use a different file, you must disable use of the first file with the no moh command before configuring the second file. This command is required to use MOH for internal calls and it must be configured after MOH is enabled with the moh command. Range is to We recommend port because it is already used for normal RTP media transmissions between IP phones and the router.
Valid port numbers for multicast include even numbers that range from to The system reserves odd values. The default is that the MOH multicast stream is automatically output on the interfaces that correspond to the address that was configured with the ip source-address command.
For MOH on internal calls, packet flow must be enabled to the subnet on which the phones are located. As shown in the following table, each chapter takes you through tasks in the order in which they need to be performed.
Configuring Version 4. Cisco Unified Communications Manager. Certification Authority Interoperability Commands. Certificate Enrollment Enhancements. Media Inactive Call Detection. Survivable Remote Site Telephony.
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature. Registered Cisco. Skip to content Skip to footer. Book Contents Book Contents. Find Matches in This Book.
PDF - Complete Book 4. Updated: April 21, Figure 1. You have an account on Cisco. Click Insert. Apply the SRST reference or the default gateway to one or more device pools. On the Device Pool Configuration page, click on the required device pool icon.
After a list of phones appears, click on the required device name. The Phone Configuration appears. Version 4. Call transfer is supported only on the following: VoIP H. Version 1. Note If you are in one of the states in the United States of America where there is a regulatory requirement for CAMA trunks to interface to emergency services, and you would like to connect more than 48 Cisco Unified IP phones to the Cisco multiservice routers in your network, contact your local Cisco account how to force yourself to have a panic attack for help in understanding and meeting the CAMA regulatory requirements.
Note The commands listed above are ineffective unless both commands are configured. Trancoding and Transrating are not supported. Secure SIP lines or trunks are not supported. Enter your password if prompted.
Step 2 configure terminal Example: Router configure terminal Enters global configuration mode. Step 3 ipv6 unicast-routing Example: Router config ipv6 unicast-routing Enables the forwarding of IPv6 unicast datagrams. Step 4 voice service voip Example: Router config voice service voip Enters voice-service configuration mode to specify a voice encapsulation type.
Step 9 exit Example: Router config-voi-sip exit Exits voice service voip configuration mode.
Information About SCCP SRST
Survivable Remote Site Telephony (SRST) is a Cisco Unified Communications Manager (CUCM) call processing backup mechanism that allows Cisco IP phones to register to a Cisco router. 8 rows · Dec 21, · There are two types of SRST supported by Cisco IOS gateways: SRST (call manager fallback. Mar 15, · Cisco Unified SRST or Unified E-SRST is a critical component of a centralized call-processing architecture in which a Cisco Unified Communications Manager cluster, located at a central site, provides telephony services for all sites of an organization.
Product overview. Helping provide reliable communications to branch offices and cloud telephony deployments. As the enterprise extends its IP telephony deployments from central sites to remote branch offices, a critical factor in achieving a successful deployment is the capability to support backup call control at these remote locations. The architecture provides numerous benefits for enterprises, including centralized and simplified management. A centralized call-processing architecture must include a strategy for survivability of telephony service at the remote branch offices when access to the centralized call-processing services is interrupted because of a WAN outage or other factors.
Call-processing redundancy in the remote location is particularly critical during an emergency which may be the actual cause of the WAN outage. The enhanced reliability makes Cisco Unified Communications a cost-effective solution to help ensure telephony operation for all users in an organization, whether they are located in the headquarters or in a remote location.
Furthermore, in certain environments, the security of telephony communication is a critical requirement. This solution supports secure telephony communication between any two phones in the network, whether those phones are in the headquarters facility or at a remote location. Cisco Unified SRST contributes to this secure telephony communication solution by supporting the same secure telephony protocols in a remote location when that location loses communication with the centralized Cisco Unified Communications Manager.
Based on Cisco Unified Communications Manager, these solutions offer industry-leading collaboration technologies for secure and scalable cloud services. With UCM in the cloud, all enterprise sites act like remote-office locations. Cisco Unified SRST functions in the remote-location router to automatically detect a failure in the network and initiate a process to provide call-processing backup redundancy for the IP phones in that location and help ensure that the telephony capabilities stay operational.
Upon restoration of WAN connectivity, the system intelligently and automatically shifts call processing back to the primary Cisco Unified Communications Manager cluster. The Cisco Unified SRST configuration needs to be completed only once—during the initial installation—simplifying deployment, administration, and maintenance. Router platform support. Table 1. SRST platform support.
Cisco ISR. Cisco X ISR. DNA Advantage. Current licenses are Smart-enabled, providing benefits of license pooling and portability together with better visibility of ownership and use. As Smart entitlements are fully portable across any device; standalone perpetual licenses are now versioned and require Cisco Software Support Service SWSS for upgrades.
Cisco SRST Version 14 licenses also provide entitlement to use any earlier, currently supported application versions. Table 2. Top-level part number. SRST License options. Select the required quantity. Note: It may be necessary to modify a Collaboration Flex Plan subscription to ensure that current entitlements are delivered to the nominated Smart Account. There is no additional charge for selecting Cisco SRST licenses or for modifying a subscription for this purpose.
Refer to Flex Plan documentation for further information. Cisco environmental sustainability. Table 3. Environmental sustainability. Information on product material content laws and regulations. Information on electronic waste laws and regulations, including products, batteries, and packaging.
WEEE compliance. Cisco makes packaging data available for informational purposes only. It may not reflect the most current legal developments, and Cisco does not represent, warrant, or guarantee that it is complete, accurate, or up to date. This information is subject to change without notice. Cisco Capital. We can help you reduce the total cost of ownership, conserve capital, and accelerate growth.
In more than countries, our flexible payment solutions can help you acquire hardware, software, services, and complementary third-party equipment in easy, predictable payments. Learn more. Cisco Unified SRST offers a simple, cost-effective solution for customers who want the benefits of a centralized call-processing architecture with redundancy at remote branch offices. Document history.
Added information related to Catalyst Edge router. Jan Added information related to Catalyst Edge router platforms. Nov July Product overview Helping provide reliable communications to branch offices and cloud telephony deployments As the enterprise extends its IP telephony deployments from central sites to remote branch offices, a critical factor in achieving a successful deployment is the capability to support backup call control at these remote locations.
Benefits of a centralized call-processing architecture Cisco Unified SRST or Unified E-SRST is a critical component of a centralized call-processing architecture in which a Cisco Unified Communications Manager cluster, located at a central site, provides telephony services for all sites of an organization.
Figure 1. Sustainability topic Reference Information on product material content laws and regulations Materials Information on electronic waste laws and regulations, including products, batteries, and packaging WEEE compliance.
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