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— Flexible calling features
This feature handles such things as call holding, call transfer, and conference calling. See
the documentation for your phone for further details.
To simplify ordering in North America, National ISDN provides a set of ISDN Ordering Codes
(IOCs) that allow service packages to be ordered. When there is only a NETGEAR router on a
line, we recommend that you use the IOC called Capability J, which provides the following:
•
Two B channels, with one configured for data and the other for alternate voice and data
•
No packet data on the D channel
•
One directory number for AT&T and Siemens switches and two for Northern Telecom
switches
•
Caller ID enabled for both voice and data services
Hunt Groups
If you have multiple Basic Rate lines connected to a single unit, we recommend that you arrange
with the telephone company to have them placed in a hunt group under a single telephone number.
Each line still has its own individual directory number(s). Having a hunt group enables a caller to
connect to the first available B channel, without the trouble of having to try alternative numbers in
the event of a busy signal. This is especially important with Northern Telecom switches, because
of their use of two directory numbers per line.
Long Distance Service
If you are planning on sending digital data over long distance circuits, you need to choose a long
distance carrier when ordering your ISDN line. You should make sure that your long distance
carrier is capable of carrying 64 KBps circuit-switched digital data from your local telephone
company switch into its network, and from its network to the data's ultimate destination. In some
instances, you might have to settle for 56 KBps circuits. You must remember to make allowances
for the circuit when making calls over long distance circuits.
You should contact your long distance carrier separately to order ISDN data service. You should do
this even if you notify your local telephone company of your choice of long distance carrier, or
even if you use a prefix such as 10-ATT to select the carrier on a call-by-call basis.
Ordering ISDN Lines
Reference Guide for the Model RT210/RT211 ISDN Routers
C-5
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Troubleshooting
