GTE Omni Si Database Technical Practices Issue 1 Manual

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DATA EQUIPMENT/12.0 The data system can handle a maximum of 120
ENGINEERINGdata ports. This section provides a general configuration
overview, detailed configuration rules and limitations, and
procedures for engineering the data system.
The following parameters describe the customer requirements to
configure or add on a data switch:
APM= Tl + T2 - T3
where 
Tl = number of asynchronous data terminal ports
requested (maximum speed = 19.2 Kbps) (VPLO or
VP20)T2 = number of asynchronous host ports requested
(maximum speed = 19.2 Kbps) (VPLO or 
VP20)T3 =number of Digital Featurephones with APM
requested (VPLO or 
VP20)SPM= 
Sl + s2
where 
Sl= number of X.25 ports < = 19.2 Kbps (using
RS-232-C interface) (VPLO or 
VP20)S2 = number of X.25 ports 
> = 9.6-64 Kbps (using
V.35 interface) 
(VPLl or VP21)
Computing Hardware12.1 To compute the required hardware quantities, first
Quantitiesdetermine the number of data ports needed. There are five types
of ports:
l Terminals
- Asynchronous (with or without modems)
- X.25 (with or without modems)
. Host ports
- Asynchronous (with or without modems)
- X.25 (with or without modems)
l Number of modems in each modem pool (if required)
l Data network connections
l Network interface connections
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Compute the hardware quantities as follows:
1. Compute the total of asynchronous terminals (with and without
modems), plus asynchronous host ports (with and without
modems), plus asynchronous modems in modem pools. This
total is the number of APMs or DPF/APM required.
2. Determine any other 
DFP/APM required.
3. The X.25 terminals and host ports must be split into two
groups, depending upon line speed. Those which operate at
19.2 kbps or less fall into the first group, which uses a SPM
with an RS-232-C connector. Those which operate above
9.6 to 64 Kbps are handled separately because they require an
SPM with a V.35 connector.
4. Total the X.25 terminals, X.25 host ports, and public data
network connections operating at 19.2 kbps or less. This gives
the total number of 
SPMs with RS-232-C connectors
required. These will be connected to VPLC type 0 line cards.
5. Total the X.25 terminals, X.25 host ports, and public data
network connections operating at line speeds between 9.6 and
64 Kbps. This gives the total number of 
SPMs with V.35
connectors required. These will be connected to VPLC type 1
line cards.
6. To determine the required number of VPLC type 0 line cards,
add the number of 
APMs (from step 1) and the number of
SPMs with RS-232-C connectors. Divide this by 8, rounding
up if the answer is a fraction.
7. To determine the number of VPLC2 cards, add the number of
DFP (with and without APM). Divide this number by 8, rounding
up if the answer is a fraction.
8. To determine the required number of VPLC type 1 line cards,
divide the number of 
SPMs with V.35 connectors by 2,
rounding up if the answer is a fraction.
NOTE: Since these VPLC type 1 cards control the system’s
high-speed links, it is often advisable to order and configure
an extra or back-up VPLC type 1 card for links to public data
networks. (Remember, each VPLC type 
1 has only two usable
circuits.)
9. Determine the number of NIC cards.
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After completing step 9, list the quantities of hardware required:1.-APM
2.DFP/APM
3.SPM with RS-232-C connectors
4.SAPM with V.35 connectors
5.VPLC type VPLO
6.VPLC type VPLl
7.VPLC2 type VP20
8.VPLC2 type VP21
9.ADMP card (2-card pair) per PD-200 Data System
10.UCB cards
11. PR
12.PBE
13.PBT
14.NIC - one per Tl card set
Local Packet Bus12.1.1 Refer to Figures 12.1 through 12.6 for possible LPB
Configuration(Local Packet Bus) configurations. These figures also provides
placement of PR, PBE, PBT, and UCB functioning as bus
terminators.
Figures 12.2 and 12.3 represent possible LPB configurations.
The recommended arrangement for most applications is to use a
complete file (A 
& B, C & D) for the LPB. Put voice cards in the
unused 
PCMUSs. This will make the best use of both the data
and voice bus capacity of the file. Put LPB 0 in the Get Started
File whenever possible (see Figures 12.4, 12.5, 12.6).
INOTES:I
0 Placement of bus extender and terminators can be reversed.
e In the following configurations, the UCB is configured to
function as a bus terminator card (see Figure 12.7).
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GROUP Cslot DOGROUP D slot DlOGROUP Aslot BO GROUP B slot 
89
Figure 12.4Example of Two Local Packet Buses in Groups B & D
GROUP C
slot DO GROUP 
Dslot D10GROUP A + B
slotGROUP AGROUP Bslot
A0B9
Figure 12.5Example of Two Local Packet Buses (LPB 0, LPB I) in Groups A& B and D
slot coGROUP CGROUP D
slot 
DlOGROUP A 
+ B
.---------------------------------------------
GROUP A
slot BOGROUP B slot B9
Figure 12.6Example of Two Local Packet Buses (LPB 0, LPB 
I) in Groups B and C & D
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To connect the LPB into one bus in the top file of the PEC, add
jumper wires between slots X24 and X25, pins 36-40 and 86-90.To connect the LPB into one bus in the bottom file of the PEC,
add jumper wires between slots Y26 and Y28, pins 36-40 and
86-90.Example: X24 pin 36 to X25 pin 36
X24 pin 37 to X25 pin 37
X24 pin 40 to X25 pin 40
X24 pin 86 to X25 pin 86
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Frame Image Card
12.1.2 Once the LPB location has been determined, completePlacementthe frame image as the following flowchart indicates.
Place PR
Place PBE if needed and
PBT 
(UCB/T can replace
one PBT)PR, PBE, PBT, or 
UCB/Tcan only go in end slots
bAO, A10
BO, 
B9C6, Cl0
DO, DlOIf 
UCB/T is not used,
place UCBIt is recommended to place
UCB into the Get Started File
Place NIC PCB if
required
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Figure 12.7
Flowchart for Card Placement
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Table 12.1 provides a worksheet for determining card slots and
cards required to support the data option.Table 12.1Worksheet for Data OptionTotalnumber of 
APMsrequired:
9Total number of high-speed SPMs required:
= s2
= item 5SPM High
10Number of ADMP card sets required:ADMP1
11Number of UCB cards required:UCB1
12Number of VPLC type 0 cards required:
= add items 6 and 8 and divide by 8
= APM + SPM low) 
/8 rounded up to the next
whole number
VPLO
13Number of VPLC type 1 cards required:
= divide item 9 by 2
= SPM high/2 rounded to the next whole
number
VPLl
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							TL-130500-1001Table 12.1Worksheet for Data Option (Continued)= 
DFP/APM/8 rounded
up to the next whole
Number of slots used:
= 
add2timesitemlO+ items11,12,13,14,15 + item 17
= ADMP times 
2+ UCB + VPLO + VPLl +
VP20 + VP21 + PR + NIC
19Number of packet bus extender cards
required:
= 
Oifitem16is < or =64= 1 if 16 
> 64 or if data cards occupy both
files
NOTE: Depends upon configuration.PBE
20Number of packet bus terminator cards
required:
If 1 LPB is configured the UCB is normally
used to terminate the bus
When a second LPB is used a PBT will
terminate the bus.PBT
21Number of PCMUS slots required:
= add items 18, 19, and 20
= SLOT + PBE + PBTPCMUS
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Voice Packet LineCard Configuration12.2 Table 12.2 provides configuration rules that apply to
both VPLC (FB 17226-A) and VPLC2 (FB 17246-A).
Table 12.2Voice Packet Line Card Type 0 and Type 1 Configuration Rules
TYPE OF VOICE
PACKET LINENUMBER OF
CARDPORTSTYPE OF VOICE PACKET LINE CARD
VPLC
type VPLO
VPLCtype VPLO
VPLC2type VP20(1) APM
(2) SPM running at less than or equal to 19.2 kbps
(1) APM
(2) SPM running at less than or equal to 64 kbps
(1) DFP/APM
(2) APM
(3) SPM running at less than or equal to 19.2 kbps
VPLC2type VP212(1) DFP/APM
(2) APM
(3) SPM running at less than or equal to 64 kbps
NOTE: Both VPLC type VPLO and 
VPLl are the same physical
hardware. The type of VPLC card required is selected via a
setting in the data base when adding the card to the system.
No hardware changes are required. The VPLC2 also comes
in type VP20 with 8 ports and VP21 with 2 ports.
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