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40-400-00001, Rev. A
Problem: Cannot place X.25 call by dialing a number.
Solution:
Select SVC for D Channel X.25 setting. Connect one TE to port 1 and
the other to port 2. Ensure that both TEs send X.25 Reset packets to
the ILS-1000 before attempting the call.
Problem: Electronic key telephone drops calls when an-
other incoming call is selected.
Solution:
Ensure that EKTS is enabled, call appearances is set to the number of
call appearances (button/light indicators) on the TE, and that the Key
Hold setting is On: Auto-Hold.
Reference Documents
The following specification documents, among others, have been used for the
development of the ILS-1000 ISDN Line Simulator.
ITU-T Recommendation Q.931, ISDN Call Control, Layer 3
ITU-T Recommendation Q.921, ISDN LAP-D Protocol, Layer 2
ANSI T1.601, ISDN Physical Layer Specifications, Layer 1
National ISDN Generic Guidelines for ISDN Terminal Equipment on Basic Rate
Interface, Bellcore SR-NWT-002661
ISDN D-Channel Exchange Access Signaling and Switching Requirements (Layer
2), Bellcore TR-TSY-000793
ISDN Access Call Control Switching and Signaling Requirements (Layer 3), Bellcore
TR-TSY-000268
ISDN Features-Common Switching and Signaling Generic Requirements, Bellcore
TR-TSY-000847
ISDN Hold Capability for Managing Multiple Independent Calls, Bellcore TR-TSY-
000856