Feature Description Guide
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Primary Rate
Interface (PRI)
Voice-system
features
The PRI is a high-capacity digital trunk for carrying voice and data between the service provider and customer; it
is based on the ISDN telecommunications standard. In the United States PRI is based on a T1 line and offers 23
channels; in Europe it is based on an E1 line and offers 29 channels.
All data and voice channels operate at 64 kbps. The primary difference between T1/E1 channel associated
signaling (CAS) and PRI is that PRI reserves one channel for signaling and providing features not available with
standard T1/E1 circuits such as DID and feature-rich caller ID. The Cisco Unified Communications 500 system
supports only voice PRI; shared data and voice circuits are not supported.
Private-line
automated
ringdown
(PLAR)
Users,
phones, and
extensions
Private-line automated ringdown allows the administrator to set up an analog or IP phone on going off hook to
automatically ring a predetermined number. An example is that a phone placed inside an elevator on going off
hook would automatically ring the receptionist or other defined number, internal or external.
Programmable
buttons
Users,
phones, and
extensions
Administrators can choose button features for Cisco IP Phones, including a directory number, a shared line for
trunks, speed dial, BLF showing the status of another phone with speed dial to that phone, or blank.
PSTN failover
Voice-system
features
PSTN failover automatically routes calls over the PSTN network if the IP network is down.
Redial
Users,
phones, and
extensions
You can automatically dial the last placed call from your IP phone.
Remote
teleworker
phones
Voice-system
features
IP phones used by remote teleworkers are called remote teleworker phones. A remote teleworker is a user who is
not physically present at the main office and uses secure IP network to connect remotely.
Remove
conference
participants
Voice-system
features
This feature allows removal of the last user who joined a conference call.
Repeat last
number dialed
Users,
phones, and
extensions
You can automatically dial the last placed call from your IP phone; this feature is also known as redial. You can
also use directory, placed calls to redial any of the last 30 calls placed.
Resetting
phones
Users,
phones, and
extensions
You can reset an IP phone remotely from the call control agent (IP PBX). The call control agent sends out control
messages to the IP phone to reset itself and start the bootup process.
Resetting TAPI
session
Users,
phones, and
extensions
TAPI sessions are used for controlling IP phones. A Windows desktop application Telephony Service Provider
(TSP) is installed and configured with an application like Microsoft Outlook to control the user’s IP Phone. The
TSP using the Windows telephony API communicates to the UC 500 call-control agent to control the operation of
the IP phone. Resetting a TAPI session flushes out the current session parameters and forces the TSP to
reestablish communication with the call-control agent. This is sometimes necessary due to TSP or application
issues.
Restriction
tables
Voice-system
features
These tables are used to control a list of numbers (or dial patterns) that are not allowed to be dialed.
Restore to
factory
defaults
Voice-system
features
This operation restores the system to its factory default setting. It resets all the configuration parameters as well
as any database maintained by the system.
Resume
Users,
phones, and
extensions
This softkey feature on IP phones allows you to reclaim a call on hold. While on hold, the other end hears MOH.
When resumed, a two-way audio is established between the users.
Ringer settings
Users,
phones, and
extensions
This setting selects the ring tone on an IP phone. You can set ringers on a per-directory number basis.
Ringing-line
preference
Users,
phones, and
extensions
This feature enables you to pick up the handset and get connected to the line that is ringing on your IP phone.
This feature is used when multiple lines are configured on an IP phone.
Ringing
timeout
Users,
phones, and
extensions
Ringing timeout is associated with no answer on an incoming call. By default, Cisco Configuration Assistant
configures this value to 30 seconds on IP phones; for voice ports it is 180 seconds.
Ring-tone
setting
Users,
phones, and
extensions
You can select the ring tone on your IP phone. You can set ringers on a per directory number basis.
Rollover
buttons for
overlaid
ephone-dns
Voice-system
features
Phones with overlaid ephone-dns can use the button command with the x keyword to dedicate one or more
additional buttons to receive overflow calls. If an overlay button is busy, an incoming call to any of the other
ephone-dns in the overlay set rings on the first available overflow button on each phone that is configured to
receive the overflow.
SCCP-
controlled
analog (FXS)
ports
Users,
phones, and
extensions
You can configure analog voice ports (FXS) to be controlled by the call-control agent using the same protocol that
is used to communicate with IP phones. The FXS ports appear as IP phones to the Cisco Unified
Communications 500, and you can configure the phones with most of the features available for IP phones,
including voicemail.