Samsung OfficeServ 7200 General Description Manual page 50

DIALED NUMBER IDENTIFICATION SERVICE (DNIS)
When DNIS service is provided on an incoming E&M trunk the OfficeServ 7200 can route calls based on the
numbers received. (See DID)
DIRECT IN LINES
Outside lines may be programmed to bypass the operator(s) and ring directly at any station or group of sta-
tions.
DIRECT INWARD DIALING (DID) (T1 or ISDN PRI Service Only)
The term Direct Inward Dialing refers to types of digit steered inbound call handling. These are DID, Both Way
DID, Dialed Number Identification service (DNIS) and Direct Dial In (DDI). The OfficeServ 7200 supports the
types described below.
DID is an inbound only service where multiple telephone numbers are assigned, usually in blocks of twenty,
to a single circuit or small group of circuits. The DID circuit can be a channel on a digital T1 service terminat-
ing on an OfficeServ 7200 TEPRI/TEPRIa card.
Both way DID is a service that combines DID service with normal outbound local telephone service. This serv-
ice is provided over E&M tie line circuits. These E&M tie line circuits terminate on a channel of a digital T1 cir-
cuit on the TEPRI/TEPRIa card.
Dialed Number Identification service (DNIS) is a feature of 800 or 900 type numbers that allows the number
dialed by the caller to be identified in the telephone system by means of a sequence of DTMF digits (usually
four). This service terminates on E&M tie lines. These E&M tie line circuits can terminate on a channel of a dig-
ital T1 circuit on the TEPRI/TEPRIa card.
Direct Dial In (DDI). This is the name given to the above three services when they are provided over an ISDN
PRI circuit.
The OfficeServ 7200 has an option to select which MOH source is played to callers to a specific DID number.
DID Call Limits
This option defines the maximum number of simultaneous calls that the system will accept for each DID
number. Any call attempts after the Maximum Call (MC) count has been reached will be rejected and busy
tone returned.
DIRECT INWARD SYSTEM ACCESS (DISA)
Users can call in on specific DISA lines at any time, input a security code and receive system dial tone. Users
can now place internal calls or if permitted, calls using C.O. lines. The caller must have a tone dial phone and
know his/her DISA security code if DISA security codes/passcodes are turned on. DISA lines can be used as
both way lines or incoming only and may be allowed or disallowed for any of the 6 ring plan time periods.
The C.O. lines used for DISA must have disconnect supervision. The requirement to put in a DISA security code
can be disabled if desired.
DIRECT TRUNK SELECTION
Each station can be allowed access to or denied access from a trunk or trunk group by access code when LCR
is activated. When restricted, the station user must use a trunk key or a route key.
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