Demand test descriptions and error codes - Avaya Support

The links that pass through the Packet Interface are identified as application links or system
links as follows:
● Application links are endpoints that require connectivity to the server via the C-LAN
board’s Socket interface. These links pass over the packet bus, and through C-LAN ports.
The following system features use application links:
- Call Detail Recording (CDR)
- Dial-up administration
- Property Management System (PMS)
- Journal printer
- Wake-up log printer
- Announcement circuit pack upload/download of recorded messages
- IP phones
● System links
- Expansion Archangel links (signaling links for call setup of a PN’s endpoints)
- Center Stage Control Network (CSCN) links
- ISDN-PRI D-channel signaling links
- ISDN-BRI D-channel broadcast and point-to-point signaling links
- Adjunct Switch Application Interface (ASAI) links
- Remote Socket Control Link (RSCL) (C-LAN, VAL)
- BRI (TRK and STA)
Distributed PKT-INTs
LAPD links are terminated by the PKT-INT modules within IPSIs that are distributed out to the
PNs, or out to every PN for the S8700 IP-PNC.
S8700-series Fiber-PNC: As shown in Figure 55: Distributed PKT-INTs, PNs 1 and 2 have IPSIs
that terminate LAPD links. PNs 3 and 4 do not have local IPSIs, so their LAPD links are
terminated by IPSIs in PNs 1 and 2.
S8700-series IP-PNC: All port networks must have IPSI/PKT-INTs. They can be all simplex (one
IPSI per PN) or all duplex (two IPSI per PN).
724 Maintenance Alarms for Communication Manager, Media Gateways and Servers