Purpose
Destination port
To (Listener)
From (Sender)
Cisco Unified
Communications Database
Proxy
20532 / TCP
Cisco Business Edition 3000
Administrative
Workstation
Sync DAV Notification
9291 / UDP
Cisco Business Edition 3000
Connection
Mailbox Sync
Service
Cisco Unified
Communications SMTP
Server
25, 8025 / TCP
SMTP
Cisco Business
Edition 3000
Cisco Unified
Communications IMAP
Server
143, 8143, 993, 8993 / TCP
Cisco Business Edition 3000
Browser
Cisco Unified
Communications Service
Manager Phone Apps
Service
21000:21512 / TCP
Cisco Business Edition 3000
IP Phone
Glossary
Ephemeral ports
In most cases, source ports are ephemeral, meaning random within a specified range. When an outgoing
request is made, the application solicits the host device for a port from its ephemeral pool. In a few
cases, the destination port is also ephemeral, meaning that both the source and destination ports are
random.
IMAP
Internet Message Access Protocol—A protocol for retrieving e-mail messages.
SIP
Session Initiation Protocol—A signalling protocol used for establishing sessions in an IP network.
SSH
Secure Shell—A network protocol that allows exchange of data using a secure channel between two
networked devices.
SMTP
Simple Mail Transfer Protocol—A protocol for sending e-mail messages between servers.
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Glossary
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