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i2022 ISDN Teleset
10
1. If the S Interface Jack is not used and the i2022 is the only device, set the Terminating Resistor switches to 50Ω.
2. If there is a device connected to the S Interface, set the Terminating Resistor switches to 100Ω.
3. If the S Interface Jack is not used and the i2022 is the only device, set the Timing Switch to Adaptive.
4. If there is a device connected to the S Interface, and if the distance between the U Interface Module and the point
at which the device is connected is minimum, set the U Interface Module for FIXED Timing.
5. If there is a device connected to the S Interface, and if the distance between the U Interface Module and the point
at which the device is connected is great, set the U Interface Module for Adaptive Timing.
Figure 10: U Interface Module
LINE CONFIGURATION
To ensure the proper operation of your Teleset, several operating parameters must be met. This information can be
provided by your system administrator or service provider.
Service Profile Identifier (SPID)
A service profile for your Teleset that is recognized by the switch. The i2022 uses either one or two SPIDs, depending
on the application.
Check with your service provider or system administrator for the correct information. The default setting is Auto-Switch
detect and Auto-SPID.(5ESS Custom Point to Point Installations need no SPID)
Directory Number
The telephone numbers appearing on your line.
Call Appearance keys
These are configured at the switch and at your phone. You may have more than one Call Appearance of a Directory
Number. Check with the system administrator or service provider for information and multiple Directory Numbers. With
National 2 and 3 ISDN, many of the required settings can be automatically downloaded from the switch – see your
system administrator or service provider for details.
Features
Conference, Drop, Transfer, Call Forwarding, and others may need to be programmed in the Teleset
Switch Type
The type of switch used by the service provider. The i2022 will operate with the Lucent Technologies 5ESS
®
(National
or Custom ISDN), Nortel DMS-100
®
the Siemens EWSD
®,
and the AG Communications System GTD-5
®.
NOTE: Always terminate both ends of the bus. In other words, the terminating resistors should be set to on in the U
Interface Module and at the furthest device from the U Interface Module. All other terminating resistors should
be set to off.
NOTE: The timing option controls the ability of the U Interface Module to determine the echo from the far end. Since
the passive bus can take on many forms the user may find one timing option works better than the other.