cellular-infrastructure
/
osmocom-analog
9
1
Fork 2
Code Issues 11 Pull Requests 2 Projects Releases Wiki Activity

AMPS: Caller id and older phones result in not ringing #16

New Issue
Open
opened 2023-10-23 17:09:56 +00:00 by shadowcaster3 · 1 comment
shadowcaster3 commented 2023-10-23 17:09:56 +00:00
Collaborator
Copy Link

Right now, caller id implementation in AMPS prevents old (older) phones from ringing when caller id (alert with info) is in use. It should fall back to Alert.
According to note at http://osmocom-analog.eversberg.eu/docs/TIA_EIA_553_A.compressed.pdf ,
Page 83, Line 12:
Note: The Alert With Info order was not defined for ANSI EIA/TIA 553 (1989) mobile
stations, therefore, a 553 (1989) mobile station will not turn on signaling tone to
confirm an Alert With Info order. If the system does not receive a confirmation for an
Alert With Info order, in addition, the system shall send an Alert order to provide
backwards compatibility for ANSI EIA/TIA 553 (1989) mobile stations.

Right now, caller id implementation in AMPS prevents old (older) phones from ringing when caller id (alert with info) is in use. It should fall back to Alert. According to note at http://osmocom-analog.eversberg.eu/docs/TIA_EIA_553_A.compressed.pdf , Page 83, Line 12: Note: The Alert With Info order was not defined for ANSI EIA/TIA 553 (1989) mobile stations, therefore, a 553 (1989) mobile station will not turn on signaling tone to confirm an Alert With Info order. If the system does not receive a confirmation for an Alert With Info order, in addition, the system shall send an Alert order to provide backwards compatibility for ANSI EIA/TIA 553 (1989) mobile stations.
shadowcaster3 commented 2023-10-24 17:56:27 +00:00
Author
Collaborator
Copy Link

2636b36c22/src/amps/amps.c (L1279)

Here, if there is no confirmation to order 17 it should fall back to order 1.

https://gitea.osmocom.org/cellular-infrastructure/osmocom-analog/src/commit/2636b36c22066a7c7f032e213fc083fa844b367d/src/amps/amps.c#L1279 Here, if there is no confirmation to order 17 it should fall back to order 1.
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
master
Labels
Clear labels
No items
No Label
Milestone
Clear milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
No Assignees
1 Participants
Notifications
Due Date
The due date is invalid or out of range. Please use the format 'yyyy-mm-dd'.

No due date set.

Dependencies

No dependencies set.

Reference: cellular-infrastructure/osmocom-analog#16
No description provided.
Delete Branch "%!s(<nil>)"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?