GTE Omni Si Database Technical Practices Issue 1 Manual

TL-130500-1001
System Capacities12.3 Table 12.3 provides slot requirements and PLA (Packet
Line Address) requirements for data card and remote devices.
Table 12.3PCB/Device Quantity per System
CARD OR DEVICEQUANTITYNO. OF
PCMUS SLOTSADMPA&CFB-17229-A FB 
17230-BOA
UCB/DCP
FB-17231 -A1 per system
1 per system1 each
(2 total)
1Packet Router
FB-17228-BOA1 per system
1
PBE/T
FB-17227-A
VPLC (type VPLO)
FB-17226-AThis # depends on
the packet bus
configuration.
1 per 8 ports
VPLC (type 
VPLl)FB-17226-A
VPLC2...

TL-130500-1001Power Requirement12.4 Table 12.4 provides power requirement for data cards and
remote devices.
Table 12.4Physical Location and Power Requirements of Cards
S-l 94TYPEESTIMATED POWER REQUIREMENTS
+ 5VDC+ 12VDC-12VDC-48VDC1 
VPLCVPLC210.834 Amp
1  UCB (see Note)12.62 Amp0.038 Amp 
-IADMP (2 cards)
4.48 Amp0.13 Amp0.056 Amp 
-
PR2.2 Amp0.038 Amp -
PBE/T (see Note) -RPTR
1.5 Amp
1  
NCI2.0 Amp
APM
Not powered from the switch
SPM
Not powered from the switch
NOTE: When these cards are equipped...

TL-130500-1001Local Packet Bus12.7 The general configuration rules for the data system can be
Configurationcharacterized as falling into one or more of the following
Rulescategories:
l 
PHI’ (Physical Limitation) = limited by physical space or
number of slots.
l POW (Power/Thermal) 
- limited by available power or thermal
considerations.
l SYS (System) = system design limitation
l MEM (Memory) = available memory limitation
l PRO (Processor Power) = software processing power
limitation
l CON...

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l A VPLC2 type VP20 card will support up to eight DFPs (with or
without the APM), 
APMs, or SPMs running at not greater than
19.2 2Kbps in any combination. Alternatively a VPLC2 type
VP21 card can support one SPM running at up to 64 Kbps and
one other device (SPM at any speed or APM) (PRO, PHY).
e A PEC has two files (shelves) (PHY,SYS).
* The total number of VPLC, ADMP, and VCIP cards per local
packet bus primary or extension is eight (POW, PRO).
l No data card can reside in the last...

SVR 5210l The PR (Packet Router) routes mini-packets on up to two
LBPs. The first LPB (LPB-0) on a PR is bounded by the PR
and a PBT (Packet Bus Terminator), or UCB/DCP with Bus
Terminator (UCB/BT). The second LPB (LPB-1) is bounded
by a PBE (Packet Bus Extender) and a PBT.
Twelve hundred mini-packets a second, per LPB, can be
routed through the PRE without overflowing.When configuring
the system, traffic calculations should be made accordingly.
The bits-per-second rate of all asynchronous and...

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Data Throughput
12.9.1 For each APM, SPM, or 
DFP/APM connected to the
Considerationssystem, the PD-200 Data System supports either the
combination of one voice communication and up to 19.2 Kbps
asynchronous data communications, or one voice
communication and up to 64 Kbps synchronous data
communications. Throughput on each LWL (Local Wire Loop)
has been sized to accomplish this. Each LWL working in 
half-duplex mode at 256 kilobytes can transfer 1,330 mini-packets
per second in each...

SVR 5210TL-130500-1001
.If multiple components send messages to the same destination
component simultaneously, a temporary overflow condition can
occur. Mini-packet buffers in the VPLC and in the 
PRs are
used to hold the overflow. If the overflow condition persists, the
data system invokes an appropriate flow control mechanism.
Flow Control12.9.3 Flow control is inherent in the design of the data system
and exists at both the message and the mini-packet levels. It
provides speed matching for...

TL-130500-1001Congestion12.9.5 Congestion can occur within a normally operating data
Flow Controlsystem for two reasons:
l Due to the “bursty” nature of data traffic, a fully configured
system may saturate the internal bus structure temporarily.
l Many end points within a data system may be communicating
with a single end point (i.e., a group of 
APMs with X.25 calls
established through the same SPM). It is statistically possible
that if enough end points send simultaneously, the path to the
destination...

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Examine the figures in Table 12.6 versus those in Table 12.7,
which shows the mini-packets/second capability of the VPLC
and the PTS (Packet Transport System).
Table 12.7Mini-Packets/Second Capability of the VPLC/PTS
VPLC/PTSMINI-PACKETS/SECOND
VPLC (VPLO)2,400 (8 X 300)VPLC (VPLl)2,400 (2 X 1,200)
LPB (Local Packet Bus)
12,000PR (Packet Router)24,000 (2 X 12,000)I
Observe that each LPB (Local Packet Bus) is limited to 12,000
mini-packets/second. This limit must be taken into account
when...

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Data Traffic Per
12.9.8 The following equations can be used to calculate thePort Calculationnumber of ports which can be configured per LPB. These
equations assume a 25 percent overhead for internal control
traffic. Asynchronous and synchronous devices of varying
speeds may be mixed on each LPB. The curves in Figure 12.8
were calculated by using the following formulas:
1. The number of asynchronous devices per LPB is calculated as
follows:
s-202
12,OOOMP8 Bytes
N(a) =
SetX10 Bits XByteMP...