Telephone Network Connection - HP Compaq Presario,Presario 7479 Reference Manual

Telephone Network Connection

The modem is suitable for connection to the Public Switched Telephone Network
(PSTN) direct exchange lines and relevant branch systems (PBXs).
A ringer equivalent number (REN) is a value given to all apparatus to be connected
to the PSTN. Its value can be taken and used to calculate the maximum number of
equipment items that can be connected in parallel without impairing the
performance of the standard bell circuit.
REN = 3/n where n is the maximum number of units that may be used in
1.
parallel.
The maximum REN of a line is 4; therefore, the total REN of all apparatus
2.
connected to the line (obtained by summing the individual REN values) should
not exceed 4. This value includes any BT provided instrument, each of which
is assumed to have REN value of 1.0 unless otherwise stated. Exceeding the
REN value of 4 may cause your telephone(s) to ring weakly or not ring at all.
Only one modem should be connected to a telephone line. Connecting a
3.
modem in parallel with one or more telephone instruments is not allowed.
The REN for this piece of equipment is 0.8.
4.
The exchange should provide facilities for either loop disconnect (pulse)
5.
dialing or multifrequency (tone) dialing. The modem can be configured to
operate with either system.
During dialing, this apparatus may tinkle the bells of other telephones using the
6.
same line. This is not a fault, and we advise you not to call the Fault Repair
Service.
The modem specified in this guide is for the Compaq Internet PC.
7.
This apparatus has been approved for the following facilities:
8.
Connection to direct exchange lines providing DTMF signaling
Connection to compatible PBXs providing DTMF signaling
Operation in the absence of proceed indication, selectable by user
Call progress monitoring functions
Data modem functions
Auto-dialing functions
Auto-answering functions
Any other usage will invalidate the approval of the apparatus, if as a result, it then
ceases to conform to the standards against which approval was granted.
Government Approvals 11-3