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i2022 ISDN Teleset
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Calls Blocked
No B-Channel available
1. B-Channel in use by another station on the bus.
2. Teleset programmed with a single SPID and an Analog Port. Either the Teleset can be used or the Analog Port
can be used but not at the same time.
GLOSSARY
The definitions in this Glossary refer to the i2022 Teleset only.
Bearer Service - also known as Bearer Capability. The type of service that can be accessed on the “B” channel. Typical
Bearer Services are voice, data, and audio,
Call Appearance (CA) – A hardkey on the Teleset that is programmed for voice communication. A CA may have a unique
Directory Number, or it may be the same telephone number that appears on other keys or other Telesets.
Call Appearance Call Handling (CACH) – Pronounced “cash”- Refers to a translation in the Central Office switch. CACH is
the recommended setting for the i2022.
Call Blocking Tone – A warning tone given to the user that there is no B-Channels available.
Customer Premises Equipment (CPE) – are devices residing at or on the customers’ premises. The i2022 Teleset is CPE.
CENTREX – A business telephone service offered by the local telephone company. CENTREX offers many Electronic
Key Telephone features to enhance the operation of the i2022.
Directory Number (DN) – Also known as a telephone number.
Electronic Key Telephone Service (EKTS) – A feature that allows the Teleset to have Multiple Call Appearances (MCA)
and Shared Call Appearances (SCA).
Feature Activator/Indicator - A softkey or a programmable hardkey used to access a specific switch feature, i.e.,
Confrence, Drop, Transfer, Call Forward, Call Park, Inspect, etc.
ISDN Ordering Code (IOC) – This is a code supplied by a terminal manufacturer to be used by the telephone company in
provisioning the ISDN service. (See TP Packages)
Multiple Call Appearance (MCA) – Additional Call Appearances of the same Directory Number.
NPA – Same as Area Code
Nxx – The 3 digits after the area code. Sometimes called local exchange.
North American ISDN Users Forum (NIUF).
Network Termination 1 (NT1) – A piece of CPE required to interface S Interface devices with the U Interface from the
telephone company.
Non-Volatile (memory) – Information that is stored in the telephone that will not be lost if memory power is removed from
the telephone.
On/Off Hook – When a Call Appearance LED is lit and the user is listening to dial tone, is communicating, or has an active
call on hold. A handset removed from the cradle does not necessarily mean the Teleset is off hook. The i2022 can be
on hook with the handset removed from the cradle.
POTS – An acronym meaning Plain Old Telephone Service. In other words, your Analog Port.
Primary Directory Number (PDN) – The telephone number of a particular telephone. Some telephone companies require
the PDN to be Key 1. It is recommended that key 1 be the PDN.