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Mahanagar Telephone Nigam Ltd.
MTNL - Delhi
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Frequently Asked Questions


_Communication Plus Services
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1. PHONE PLUS SERVICES

(a) FREE OF CHARGE
1) Call Alert (Call waiting)
The Facility lets you receive another call on your telephone even when you are already in conversation. You are alerted by short duration pip-pip tones when you are busy talking, indicating that another call is waiting for you, providing you have activated this facility. You can talk to any one of the parties keeping the other waiting. Complete secrecy between the two callers is maintained.
2) Wake -up / Reminder call
This facility enables you to get reminder/ wake up calls at a pre- determined time.
3) Dynamic STD/ISD Control :
This facility provides you total control over all your outgoing calls. You can yourself lock / unlock your STD / ISD on your telephone using a four digit secret code. Since locking is done electronically and secret code is known only to you, it provides full safeguard against misuse by others. This service is available in all electronic exchanges. .
4. Call Forwarding / Transfer :
This facility allows you to transfer incoming calls meant for your telephone to any other telephone number chosen by you. Thus you can move out and yet you will not miss any important call.
(b) PAID SERVICE at a nominal charge of Rs. 20/- per service per month. Apply at divisional Customer Service Centre on a plain paper.
1. Hotline :
This facility providing you an instant connection to any one pre- determined number chosen by you.
2. Abbreviated Dialling :
This facility is ideal for converting most frequently dialled local/ STD /ISD numbers into 1 or 2 digits. A maximum of 20 numbers can be programmed into abbreviated numbers.

Note : For details contact Quick Customer Service (Q.C.S.)Centre of your exchange and in case of difficulty (After provisional of services) contact SDE (Internal) of your exchange.
For more details, click here

2. INTEGRATED SERVICE DIGITAL NETWORK (ISDN)

Integrated Service Digital Network (ISDN) as the name implies, is a state of the art Public Switched digital network. On a telephone line form this network, subscribers can send receive in digital form voice, data or image or a combination thereof from their premises.

Advantages of an ISDN Line :
Video conferencing @ 128/384 kbps.
High speed data transmission @ 128 kbps.
High quality noise-less speech, as the signals are digital from the premises
G4 fax service @ 64 kbps with transmission time reduced to one-sixth and hence corresponding reduction in call charges.
Two independent simultaneous calls on the same
For more details, click here
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