Thrane&Thrane TT-3084A Sailor Fleet77, User Manual

Page: 26 / 168

Introduction Hardware Interfaces
2
Please ensure when using only one B-channel that your
ISDN equipment is configured to support one B-channel
only.
The following services may be used on the ISDN interface:
• 128 kbit/s UDI (option on F77)
• 64 kbit/s UDI
• 56 kbit/s UDI
• Speech
• 3.1 kHz audio
• mini-M voice
Like the terrestrial ISDN network the terminal offers the
possibility to have more than one device connected to this
interface. Each device can be individually addressed when
called and the service type can be selected individually.
This requires that the attached equipment supports MSN
(Multiple Subscriber Number). Depending on the brand of
equipment it may be possible to program the equipment
with more MSN's. If a device should respond to a certain
IMN number, it must be programmed in the ISDN
equipment using the IMN as MSN. Note that the equipment
will only react if both MSN as well as service type (speech,
3.1 kHz audio, 128 kbit/s, 64 kbit/s or 56 kbit/s) fit the
ISDN equipment.
Please note: When not using the 128 kbit/s service the
ISDN interface supports data transmission of one B-
channel at 64 or 56 kbit/s as opposed to two B-channels at
64 or 56 kbit/s available on the terrestrial ISDN network.
When using satellite equipment a delay is introduced due
to the satellite link. Not all standard ISDN devices are
equally good at coping with this.
18 May 2005