MGCP fallback enables a gateway to act as local call control when the CUCM server to which the remote site phones and gateway register is offline or WAN connectivity is lost (in which case, Cisco Unified SRST kicks in and offers call control functionality).
What is SRST and MGCP fallback?
srst = Survivable Remote Telephony , when the IP Phone looses connectivity with cm, the phone registers with the default gateway. mgcp fallback = defines the fail over server in the call manager cluster.
What is Srst used for?
Cisco Unified SRST enables routers to provide basic call-handling support for Cisco Unified IP Phones when they lose connection to remote primary, secondary, and tertiary CUCM servers or when the WAN connection is down.
What does SRST mode mean?
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.
How do I enable Srst on Cisco router?
Step 1 Log into Cisco Unified CM Administration and choose System > SRST . Step 2 Click Add New. their configuration options, see the system Online Help. Step 4 Click Save.
What is MGCP fallback?
MGCP fallback enables a gateway to act as local call control when the CUCM server to which the remote site phones and gateway register is offline or WAN connectivity is lost (in which case, Cisco Unified SRST kicks in and offers call control functionality).
What is MGCP backhaul?
MGCP PRI backhaul is a method for transporting complete IP telephony signaling information from an ISDN PRI interface in an MGCP gateway to Cisco Unified Communications Manager using a highly reliable TCP connection. It Terminates all ISDN PRI Layer 2.
What is Srst EP?
Customers are encouraged to migrate to the current Cisco Unified Survivable Remote Site Telephony (SRST) Smart Licensing offer, by ordering a SRST-EP license for each configured device. ... The program is open to all business users of Cisco equipment and its associated brands and subsidiaries.
What port does SCCP use?
Secure SCCP uses TCP port 2443 .
How does Cisco SRST work?
When the system automatically detects a failure, Cisco Unified SRST uses Simple Network Auto Provisioning (SNAP) technology to auto-configure a branch office router to provide call processing for the Cisco Unified IP phones that are registered with the router.
What does fallback mode mean?
If your computer’s graphics card doesn’t support certain features, a more basic version of the desktop will be displayed and you will see a message telling you what happened . This is called fallback mode, and it allows you to use GNOME on your computer without some of its more advanced features.
What is a Cisco cube?
Cisco Unified Border Element (CUBE) is a unified communications border element , providing voice and video connectivity between the enterprise IP network and service provider network. It is similar to a voice gateway, except for the replacement of physical voice trunks with an IP connection.
What is Cisco voice gateway?
Cisco IP telephony gateways enable Cisco CallManager to communicate with non-IP telecommunications devices. Cisco CallManager supports several types of voice gateways. This section covers the following topics: • Gateway Control Protocols and Trunk Interfaces.
What is Cisco Emergency Responder?
Cisco Emergency Responder enhances the existing emergency 9-1-1 functionality offered by Cisco Unified Communications Manager. ... Supports automatic notification of customer security personnel when an emergency call is in progress and provides the caller’s location.
What is the difference between MGCP and H 323 voice gateways?
H. 323 gateway interfaces support the NFAS (Non-Facility Associated Signaling) feature, while MGCP gateways do not . The NFAS feature allows one Q. 931 D channel in a PRI to carry voice signaling for up to 20 PRIs.
Which protocol does q931 backhauling and what does it mean?
Backhaul means transporting signaling (all Q.931 messages) from an ISDN PRI/BRI interface on an MGCP gateway to CUCM for processing. That information is backhauled to CUCM through a TCP connection. ISDN Q.931 is the L3 specification that is responsible for call control and management (call setup, tear down, etc).
