Installation guide

Synapse Installation Guide Back to Contents
Glossary 163
DSL (Digital Subscriber Line): High-speed Internet service through your telephone line.
Telephone lines with DSL service require DSL filters to separate the telephone and data
signals.
DTMF (Dual-Tone Multi-Frequency): Telephone tones commonly known as “touch-tone”
dynamic IP address: An IP address that is automatically assigned by the server
Emergency Bypass Port: The fifth SB67010 PSTN Gateway jack that can provide
telephone operation during a power failure when used with an analog phone
ESD (Electrostatic Discharge): A sudden and momentary electric current that flows
between two objects at different electrical potentials that may cause damage to
electronic equipment
ESF (Extended Super Frame): A telecommunication standard for T1 framing that
includes a cyclic redundancy check and a 4000 bit/s channel capacity for the data link
channel
Ethernet: A type of computer networking technology that connects devices via Local
Area Networks (LANs)
Extension Directory: A private list of names and phone numbers available to only a
single extension (referred to as “Personal list” on the Deskset)
Extension list: A list of names and extension numbers for the Synapse system
telephones
extension number: The three-digit or four-digit number representing each individual
Deskset
factory default: The original product settings
FDL (Facility Data Link): A 4-kbps channel provided by the Extended Super Frame (ESF)
T1 framing format that allows a service provider to check error statistics on customer
premises equipment without interfering with the customer premises
flash memory: Reprogrammable system storage used for storing software upgrades
FWD ON ( ): An indicator in the top right corner of the Deskset display that
appears when the Call Forward feature has been turned on. This feature causes calls to
that extension number to be automatically forwarded to another extension, outside
phone number, or to Voicemail.
FXO (Foreign Exchange Office): The Gateway telephone signaling interface between the
PSTN telephone lines and the LAN
FXS station port: A jack on the ATA for connecting non-Synapse analog telephone
equipment to the Synapse system
G.711: A digital fax protocol
Gateway: A network device equipped for interfacing with another network that uses
different protocols
greeting, preset: The voice message that plays to callers if the user has not recorded an
outgoing message
grounding: An electrical ground connection that minimizes interference, reduces the risk
of equipment damage due to lightning, eliminates electrostatic buildup, and helps protect
people who service the equipment