How to make long - Distance
calls
* To provinces and cities
within Vietnam:
- 0 + Area code + Tel.
Number or
- 171 (177, 178) + 0 + Area
code + Tel. Number (economic
call)
* To other countries:
- 00 + Country code + Area
code + Tel. number
- 171 (177, 178) + 00 +
Country code + Area code +
Tel. number (economic call)
or
- 171 + 1 + Waiting for
connective tone + Country
code + Area code + Tel.
number
Telephone services
Multi - frequency service:
Multi-frequency Service
allows the subscriber to
connect quickly and more
conveniently.
Speed dialing service:
Speed Dialing Service allows
the subscriber to dial more
efficiently by substituting
for 2 digits, for the entire
telephone number
Data transmission service
Data Transmission Service
allows data transmission of
the following types:
- PC to PC.
- PC to computer network.
- Computer network to
computer network.
- PC or computer network to
database site.
Leased Line
A point-to-point line of the
following types may be
leased:
- Long distance
- Telex
- Radio and Television
- Data transmission
Public Telephone agents
Telephone with operator
service at post offices,
post agents, public
telephone agents…
Collect call service
* Collect call:
Allows the subscriber in
Vietnam to make a telephone
call to Australia, Canada,
Denmark, England, France,
Japan, New Zealand,
Switzerland, and the USA.
The charge will be billed to
the receiver instead of
caller.
* Access collect:
Allows subscribers to make
international calls to USA
from home telephones, post
offices, card-phone
telephones of card-phone
Vietnam System.
- Access code: 120. 12345.
- Charge of the call will be
paid by receiver of the call
- Service charge: Customer
using telephone of
card-phone Vietnam system
will pay service charge of
500d/each call (including
unsuccessful call).
VoIP services
VoIP (Voice Over Internet
Protocol) is telephone
service applications based
on internet through
telephone network. Example:
171, 1717 calling service.
“1717 call” service
1717 is prepaid VoIP
telephone service, using
VoIP technology, provides
domestic and international
long-distance calls. Service
code is 1717. Customers –
who want to use “1717 calls”
service must buy 1717 card.
Additional telephone
services
Forwarding service
Forwarding Service allows
the subscriber to forward
all incoming calls to any
other previously chosen
telephone number.
Caller identifying service
Caller Identifying Service
allows the subscriber to
identify the telephone
number of an incoming calls
through switchboard 500.
Conference calling service
Conference Calling Service
allows the subscriber to
connect with two other
subscribers at the same
time.
Automatic alarm service
Automatic Alarm Service
allows the subscriber to
program the telephone to
ring at a previously chosen
time.
Absentee messaging service
Absentee Calling Service
allows the subscriber to
inform callers of his
absence.
Call waiting service
Call Waiting Service allows
the subscriber to know about
another call while he is on
the line. The subscriber can
keep the current call to
receive the new one and then
turn to the previous call.
Hotline service
Hotline Service allows one
subscriber to be
automatically connected to
another subscriber without
having to dial.
Polarity revert signal
service
Polarity Revert Signal
Service allows the
subscriber to immediately
know the fee of each call
through fee-calculating
equipment connected to the
telephone.
Calling only or receiving
only telephones
Telephones made specifically
to only receive or call, not
both.
Restricted telephone service
Restricted Telephone Service
allows the subscriber to
prevent others from making
unwanted calls (for example:
long distance calling).
Three forms of restriction:
- Private code restriction
- Automatic restriction
- Complete restriction
Consecutive dialing service
Consecutive Dialing Service
allows the subscriber to
dial all telephone numbers
in a group consecutively by
just dialing the main
telephone number of that
group (used for PABX
switchboard).
Information enquiry services
* Talking yellow pages
(1081): Provides all
information in Hanoi
Telephone Directory and
Yellow Pages and related
information.
* Social and cultural
information clearing up
queries service (1080):
Provides social and economic
information.
* Connecting customers to
consultants (1088):
Connecting Customers to
Consultants in the fields of
healthcare, nutrition, drug
preventive measures, law,
informatics, construction,
tourism, estate trading,
education and training,
intellectual property,
love-marriage-family
matters.
