Information Technology Reference
In-Depth Information
local directory
The directory that is built automatically by the CME router as you define
caller ID information for the ephone-dns.
local group pickup
A method used with call pickup to answer a ringing phone from within
the local group of an IP phone.
local loop
The PSTN link between the customer premises (such as a home or business) and
the telecommunications service provider.
loop start signaling
A method of signaling that relies on connecting the tip and ring wires
connecting to a device to complete an electrical circuit; typically used in devices connecting
to the PSTN.
mailbox caller features
Mailbox features that Cisco Unity Express offers to a caller,
where the caller may or may not be a subscriber configured on Cisco Unity Express.
mailbox subscriber features
Mailbox features that Cisco Unity Express offers to a con-
figured subscriber.
mean opinion score (MOS)
A subjective method of determining voice quality; listeners
hear a phrase read over a voice network and rate the quality of the audio on a scale of 1 to 5.
Media Convergence Server (MCS)
The server hardware platforms that support Cisco
Unified Communications Manager software.
Media Gateway Control Protocol (MGCP)
Voice signaling protocol created by the IETF;
allows voice gateways to be controlled by a centralized call agent in client/server fashion.
message notification
Feature used to generate a call, send an e-mail, or send a page to the
subscriber when a new message has arrived in their mailbox.
Message Waiting Indicator (MWI)
Provides a mechanism to alert a subscriber that a new
message has arrived in a mailbox. This is typically achieved by turning on a light on the sub-
scriber's IP phone.
Mobile Connect
The ability to have a call for the user's enterprise IP phone number simul-
taneously ring up to ten remote devices, and switch seamlessly between IP phone and remote
device while in the call. Also known as Single Number Reach.
Mobile Voice Access (MVA)
The ability for a user to dial in from a remote device to an
enterprise MVA access PSTN number, authenticate, and then place an outbound PSTN call
that appears to come from their enterprise IP phone.
Monitor Mode/Watch Mode
Line configuration that allows you to assign line instances to
a Cisco IP phone that cannot be used for incoming or outgoing calls; rather, they can simply
be used to check line status.
Network Time Protocol (NTP)
Synchronizes the clock of a network device to a more
accurate NTP server.
Nyquist theorem
Describes the method of converting analog audio signals into digital for-
mat by sampling at twice the highest frequency of the audio.
