How does Cisco SRST work?

The Cisco Unified SRST gateway uses SNAP technology to autoconfigure the branch office router to provide call processing for Cisco Unified IP Phones that are registered with the router. In the event of a WAN failure, when the branch IP Phones register to the SRST gateway, do not erase the settings on the phone.

Table of Contents

What is SRST Cisco?

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.

Which is used to assign an SRST reference to the phone?

The IOS router must be defined as an SRST reference in CUCM. Then this SRST reference consecutively needs to be added to the appropriate device pool to enable the phones at remote sites to leverage SRST.

Does Jabber support SRST?

Cisco Jabber for Windows supports the following features with Cisco Unified Survivable Remote Site Telephony (SRST) Version 8.5: ● Basic call functions ● Ability to hold and resume calls Cisco Jabber for Windows requires an active connection to the presence server to successfully fall back to SRST.

What is SCCP and SIP?

SIP is used for establishing, modifying, and terminating IP based communication sessions with one or more participants whereas SCCP is a Cisco proprietary protocol which is used for communication between Cisco Call Manager and Cisco VOIP phones.

What is the purpose of using device pools?

Device pools provide a convenient way to define a set of common characteristics that can be assigned to devices, such as IP Phones, instead of assigning individual characteristics to individual phones.

How do I check my SRST status?

To check the status of connection with cucm and the current status, use the below command: show ccm-manager fallback-mgcp —Displays a list of Cisco CallManager servers and their current status and availability.

How do I set up Cisco Jabber on my phone?

Cisco Jabber: install and set up

Connect your Android device to an on-campus Wi-Fi network.
On your device, tap App Store.
Search for Jabber.
Tap to install the Jabber app.
If prompted for app permissions, tap Accept.
Tap Open.
The End User License Agreement opens.
The Cisco Jabber screen opens.

How do I add Jabber to Cucm?

Steps to configure Jabber on CUCM. Step 1 Login in to Cisco Unified Communications Manager Administration. Step 2 Goto Device-> Phone and Add a new phone device with Cisco Dual Mode for Android as the Phone Type. Step 3 Enter settings for Device-Specific Information.

Why is SIP better than SCCP?

What port is SIP?

5060

SIP clients usually use TCP or UDP on port numbers 5060 or 5061 to connect to SIP servers and other SIP endpoints. Port 5060 is commonly used for non-encrypted signaling traffic, whereas port 5061 is typically used for traffic encrypted with Transport Layer Security (TLS).

How do you create a device pool in Call Manager?

Step 1 Choose System > Device Pool. The Find and List Device Pools window opens. Step 2 Click the Add a New Device Pool link to open the Device Pool Configuration window. Choose, at a minimum, the Cisco CallManager group, date/time group, region, and softkey template.

How do I add a phone to Cisco Call Manager?

In Cisco Unified Communications Manager Administration, select Device > Phone, then click Add New. In the Add a New Phone window, select your phone model in the Phone Type field, then click Next.

How do I find my SRST gateway?

Verifying and Troubleshooting SRST

Create an SRST reference.
Create a new device pool using the SRST reference from Step 1.
Assign the new device pool to IP phones for testing.
If no IP phones exist, or if you are testing an MGCP gateway, add a null route to CallManager.

What is SRST and MGCP fall back?

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.

Can I connect Jabber to my cell phone?

Instructions. The soft phone option, named Jabber, can be installed on any Windows or Mac computer, as well as Android and Apple mobile devices.

How does Jabber phone work?

The application uses your mobile voice plan to make the call, and displays the mobile voice number to the person you call. When you make a phone call with Cisco Jabber Voice for Android, the application uses your work phone number and displays that work number to the person you call.

Does Cisco Jabber require a server?

Cisco Jabber uses domain name system (DNS) servers during startup, DNS servers are mandatory for Cisco Jabber setup.

Can I use any headset with Cisco Jabber?

To take full advantage of your Cisco Jabber 9.6, we recommend a headset specifically optimized for the it. Jabra has achieved that status of Cisco Preferred Solution Partner – the highest level of partner achievements. Jabra headsets are fully compatible with Cisco Jabber 9.6.

What is the difference between SCCP and SIP?

Is SIP a proprietary?

Skinny Client Control Protocol (SCCP) is proprietary control and communication protocol originally developed by Selsius Systems and later taken over by Cisco Systems.
…
SCCP vs SIP –

SIP	SCCP
Generally used with non-cisco IP PBX like Asterisk etc.	Used with CUCM or CME

Is there a difference between SIP and VoIP?

VoIP, or Voice over Internet Protocol, is a family of technologies that enables voice to be sent over the Internet. SIP, or Session Initiation Protocol, is a protocol that can be used to set up and take down VoIP calls, and can also be used to send multimedia messages over the Internet using PCs and mobile devices.

How do SIP calls work?

SIP simply initiates and terminates an IP communication session, which could be a voice call between two people or a video conference between a team. It sets up the session by sending messages—in the form of data packets—between two or more identified IP endpoints, also known as SIP addresses.

What is a Cisco device pool?

A device pool is configured with a name and a CUCM group. It includes roaming-sensitive settings and Device Mobility-related settings configured under Device Mobility Related Information.

What are the different ways in which we can add phones in CUCM?

Activity Procedure

On Cisco Unified Communications Manager Administration page, from the menu select Device > Phone.
On Find and list phones, click Find button to list all IP Phones have been configured on the cluster.
Click Add New button to add new IP Phone.

How does Cisco SRST work?