Cisco 300-820 Dumps

call routing

traversal subzone

call policy

search rule

Add the Jabber user to Cisco Unity Connection.

Add the Jabber user to Expressway-E.

Add the Jabber user to Expressway-C.

Add Jabber Users to the Cisco Webex Administration Tool.

The private CA certificate must be placed in the phone trust store.

The Jabber client must register to the Cisco UCM internally before it will register externally.

The device running the Jabber client must use a VPN to register.

The device running the Jabber client must download and trust the private CA certificate.

The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.

Encrypted IP traffic for collaboration devices always is trusted by the firewall.

The signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.

The signaling makes it back to the endpoint because the endpoint sent the private address to the external endpoint.

d20d16d20d22

2091652010224

209165200225

d209d165d200d224

209165200224

Expressway Core can use private CA signed certificate.

You must upload the root certificates in the phone trust store.

Expressway must generate certificate signing request.

Expressway Edge must use public CA signed certificate.

The Jabber client can work with public or private CA signed certificate.

Voice calls use Webex Calling platform for call control and use hybrid media nodes for local conferencing.

Voice calls use local media nodes to keep traffic internal for internal traffic and use Webex Calling for external calls.

Voice call use Cisco Unified Communications Manager for local calls and Webex Calling for external calls.

Voice calls use local Cisco Unified Communications Manager for all calls.

Advanced Encryption Standard

IPsec

Triple Data Encryption Standard

force unencrypted

Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU.

When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones.

The IP address specified in the connection data field may be an unrouteable internal address.

The encryption keys advertised in the SDP are only valid for clients not behind a NAT.

From VMN to CUCM SIP endpoints, the source UDP ports from 52500 to 62999 is used for audio traffic.

From VMN to Webex Teams clients, the source UDP port 5004 is used for video traffic.

From Webex cloud to VMN, the source UDP port 9000 is used for audio traffic.

From VMN to video endpoints, the destination UDP port 5004 is used for audio traffic.

From VMN to Webex cloud, the destination UDP port 9000 is used for video traffic.

Expressway-E and Collaboration Endpoints

Cisco UC and Cisco Unified Presence Server

Cisco Expressway-C and Cisco Expressway-E platforms

Cisco UCS E-Series and Cisco UCM

The Expressway-E certificate includes the Expressway-C FQDN as a SAN entry

The Expressway-C is missing the FQDN of Cisco UCM in the Common Name of its certificate

In the UC Traversal Zone on the Expressway-C, the peer address is set to the IP of the Expressway-E,

which is not a SAN entry in the Expressway-E certificate

The Expressway-E does not have the FQDN of Cisco UCM listed as a SAN in its certificate

Application layer gateway is enabled to bridge the media traffic.

A static NAT route is added to the firewall to bridge the two networks.

The Expressway-E is enabled for Dual-NIC capability.

The Expressway-E is enabled for interworking

The MRA license is missing on the Expressway-E.

The Unified Communications zone is down.

Transform is not configured on Expressway-E.

The SRV record for _cisco-uds is misconfigured.

The firewall is blocking the port.