DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1194PGATE-BD (Packet Gateway Circuit Pack)
9
PGATE-BD (Packet Gateway Circuit
Pack)
Packet Gateway Circuit Pack
The TN577 Packet Gateway is a packet port circuit pack that provides
connectivity between synchronous communication links and Packet Bus
endpoints.
A LAPD signaling link is established between the Packet Gateway and the SPE
for passing call control and other management information. Since one link serves
all the ports on the circuit pack, maintenance of the signaling link is part of the
Packet Gateway circuit pack maintenance.
Three external cabling arrangements allow port configurations supporting four
RS423 connectors. External ports on Packet Gateways running the X.25
application provide switch connectivity to BX.25 adjuncts : AUDIX, CMS, ISDN
Gateway, other PBXs in a DCS network, and 3B2 Message Server Adjuncts.
Packet Gateway Congestion Controls
Congestion controls are activated on Packet Gateway when the number of
buffers reach a specified threshold (high buffer mark). The switch releases its
congestion controls when the Packet Gateway reports that it has recovered from
congestion, i.e., its utilized buffer level has returned to normal levels.
A MINOR on-board alarm is raised if congestion persists on the affected Packet
Gateway for a 15 minute interval or is raised immediately if the congestion
controls fail to prevent all buffers from being exhausted. When congestion
abates, the MINOR alarm is not retired until the Packet Gateway is free of
congestion for 30 minutes.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run
1
1. UU is the universal cabinet number (1 for PPN, 2 - 44 for EPNs). C is the carrier designation (A, B, C,
D, or E). SS is the number of the slot in which the circuit pack resides (01 to 21).
Full Name of MO
PGATE-BD MINOR test board UUCSS long Packet Gateway Circuit Pack
PGATE-BD WARNING test board UUCSS short Packet Gateway Circuit Pack
