GTE Omni Si Database Technical Practices Issue 1 Manual

							 rTL-130500-1001Data Architectural
Overview6.5 This paragraph provides an overview of the data.
architecture.
Asynchronous
Connection6.51 Asynchronous devices (terminals, hosts, and modems,
etc.) connect to the system via 
APMs (Asynchronous Packet
Managers) or 
DFP/APMs, which are collocated with their
devices. Except for call-control-related events (call setup,
disconnect, etc.), 
APMs contain all processing and transmission
capabilities necessary to support transmission of asynchronous
data. In addition, the APM provides a CCITT X.3 packet
assembler/disassembler function. This converts asynchronous
data into CCITT X.25 packets and allows signaling information
(commands) to be entered via the keyboard on the attached
asynchronous device. Local commands are supplied by using a
CCITT X.28-type command language (not fully X.28 compatible).
Remote commands are supplied by using a CCITT X.29-type
command language (Figure 6.6).
Terminal
3@-,
Figure 6.6 X.29 ProtocolThe 
APMs are addressed by using the X.121 numbering scheme,
one X.121 number per APM.
SW 5210Each APM supports one single active data call (known as a
virtual circuit). An APM can interface to half or full duplex
devices operating at speeds up to 19.2 kbps. The actual data
throughput varies according to the PAD (Packet Assembler
Disassembler) parameters’ settings and data format.
The APM communicates with the system by means of the PTS
(Packet Transport System). Each APM connects to its device
with a RS-232-C type connector and can be configured as
DTE (Data Terminal Equioment) or DCE (Data Communications
Equipment).8187s-113 
						

							TL-130500-1001Synchronous6.5.2 Synchronous CCITT X.25 devices (hosts and public data
Connectionnetworks) connect to ‘the system via SPMs, which are col-
located with their devices. Connection from the SPM to its
device is via an RS-232-C type or V.35 type connector. The
W-232-C connectors are used for devices operating at less
than or equal to 19.2 kbps, while devices operating at up to 64
kbps use the V.35 connector interface. 
SPMs can be configured
as a DTE or DCE. Each SPM is assigned one or more CCITT
X.121 addresses, depending upon the routing desired. CCITT
X.25 level 3 (packet level) and level 2 (link level, LAP-B)
protocols are supported.
s-114
8i87SW 5210 
						

							TL-4 30500-l 001
PD-2007.0 This section provides descriptive information about PCBsPRINTED CIRCUITinstalled in a system supporting the packet data option (see
BOARDSFigure 7.1).
All PO-200 cards are installed into PCMUS (Pulse Code
Modulation Universal Slot) card slots. All data cards occupy one
card slot.
In addition to the hard disk drive, floppy disk drive, and 
FB-
17220-BOA File Management System Data (FMSD) card, which
are a part of the basic voice system, the PO-200 Data System
can include the data cards listed in Table 7.1. Cards used will
vary with the size and peripheral use with the system. Universal
card slots house both common control and peripheral interface
cards for the PO-200 Data System. Card slots not used by
cards supporting the data system can be used by cards
supporting voice features. Figure 7.2 provides a block diagram
of the card interaction.
P+-----PCMUS GROUP CpJP-
-I
-a-24
-
Frr”s
c11-
-2
4
-PcTIus
f
-
d
0
-
d2
-
d3
-
d4
-
d6
-
d7
--+.-GROUP 6 -
- PCMUS GROUPC +
COMMON- CONTROL FFILE 
El-29-Pc1:”s
b
2
-
-I--.-3 3
0 1
P Pc cm ll” us sb b
3 
5
L1
I-----COMMON CONTfiOL-4--PCMUS
GGE%pP z-1 If--- PCMUS
8RRoouupP 7-1
.---Figure 7.1Universal PC8 Card Slots Used by PD-200 Cards
NOTE: Card slot 11 cannot be used by data cards.
SVR 5210
a!87s-1 15 
						

							TL-130500-1001Table 7.1PD-200 Packet Data Cards
FB??MNEMONICPCMUS CARD FUNCTION
FB-17229-A
FB-17230-BOA
FB-17231 -A
FB-17228-BOAFB-17227-A
FB-17242-A
FB-17226-A
FB-17246-A
FB-17242-A
* = two card setADMP-A *
ADMP-C *
UCB/DEP
PR
PBEIT
NC
VPLC
VPLC2
NCAdministrative and Maintenance Processor
Administrative and Maintenance Processor
Universal Control Board
Packet Router
Packet Bus Extender/Terminator
Tl Network Interface
Voice Packet Line Card (type 0 or 1)
Voice Packet Line Card 2 (type 0 or 1)
Network Interface Card
1ADMP7.1 The ADMP (Administrative and Maintenance Processor)
(ADMP-A/is a two-card set made up of the FB-17229-A (ADMP-A) and
FB-17229-Athe FB-17230-BOA (ADMP-C). A ribbon cable, which cannot
ADMP-Cexceed 6 inches, connects the two cards. The ADMP-A and
FB-17230-BOA)ADMP-C are installed in two adjacent mounting spaces. Since
the ADMP-C card does not require power, it does not require a
PCMUS card slot.
NOTE: Installation of either ADMP card into a Tl-span card slot
is not recommended.
The cards run the administrative software supporting the data
system and consist of two microprocessors connected by an
area of common memory.
l The 
NETLINK microprocessor controls the interface with the
LPB (Local Packet Bus) and operates the protocols needed to
communicate over it.
l The second microprocessor performs the administrative
processing and controls the file management system interface.
Card FB-17229-A (ADMP-A) contains all of a 
NETLINKmicroprocessor circuitry, a portion of a second microprocessor
circuitry, and shared memory and the ADMP terminal interface
connection. Card FB-17230-BOA (ADMP-C) contains the
majority of the second microprocessor’s circuitry.
The ADMP-A card contains the FGBS 
65SC102 microcircuit,
while the ADMP-C card contains the Intel 8088 microprocessor.
8187SVR 5210 
						

							SW 5210
TL-130500- 1001
UCB/DCP7.2 The UCB (Universal Controller Board) houses the DCP (Data
FB-17231 -A
Call Processing) software. This software runs the data switching
needed by the 
DFP/APM (Digital Featurephone with
Asynchronous Packet Manager), APM, SPM, and the system.
The 
UCB/DCP is divided into two major eight-bit
microprocessor circuits.
l The 
NETLINK microprocessor is used for communicating with
the LPB (Local Packet Bus). It also runs the necessary
protocols for communications over the LPB.
e The facilities microprocessor performs the data cail-processing functions for the PD-200 Data System. The
facilities microprocessor is a slave to the 
NETLINKmicroprocessor and controls the low-level bus interface and
feature processing for the 
DFP/‘APM, APM, SPM, and NIC.
Both circuits of the card communicate through a block of RAM
(Random Access Memory) accessible by both microprocessors
on a time-shared basis. The two microprocessors
communicate with each other via common memory; the 
netlinkprocessor functions as the master.
All software on the UCB communicates with other cards within
the PD-200 Data System via the transfer of messages across
the LPB; other communication is over the PEC low-level
backplane bus.
NOTE: The UCB can also be used to terminate an LPB, which is
normally done by the 
PBE/T (Packet Bus Extender/Terminator)
card. For the UCB to perform its normal functions as well as
those of the 
PBE/T, it must be located in a slot defined for PBE!Tand be so defined in the data base. If the UCB is not configured
as a bus terminator, it can be placed onto only PCMUS used by
data cards.
When depressed, the front panel RESET SWITCH causes a UCB
card reset. If self-test or error recovery software determines
that the UCB card is not operating properly, the front panel LED
flashes at a high rate (60 IPM). During software loading, the LED
flashes at the rate of 30 IPM.
8/87s-117 
						

							TL-130500-1001PR7.3 The PR (Packet Router):
FB-17228-BOA
l Electrically enables LPB 0
- The PR directly accesses LPB 0 off the backplane.
- Since the PR activates LPB 0, the card must be at one end
of that bus. It is 
recommendec to place the PR in card slot
CO8 or 
DlO.NOTE: LPB 0 connects to the PR directly off the backplane.
This bus can be located in either file.
,’l Receives and transmits mini-packets on LPB 0 and LPB 1
- Each PR can support 2 LPBs (LPB 0 and LPB 1).
- LPB 1 is accessed by the PR via the PBE. The connection
from PR to PBE is called the bus extender cable.
NOTE: The PR has four front edge tab connectors. When
used in an 
OMNI SI, only one of these is used, that being the
connection for the bus extender cable.
PBE/T7.4 The Packet Bus Extender/Terminator card electrically
FB-17227-Aenables or terminates an active LPB (local packet bus).
The card can be configured as either a PBE (packet bus
extender) or a PBT (packet bus terminator).
l When configured as a PBE:
- the card enables LPBl; this connection is directly off the
backplane of the system
- the PBE is only used when access to the second LPB
(LPBl) is needed
- by enabling LPBl, the PBE allows a PRE (packet router
enhanced) to gain access to the second LPB 
(LPBl)
- the access for the PRE to the PBE is via a front edge cable
connection call a bus extender cable
l When configured as a PBT:
- the card terminates a bus
- a PBT is required for both LPBs (LPBO and LPBl)
- the PBT must only be put into certain PCMUSs
- a UCB card can function as a PBT as well as performing its
UCB functions
S-1188187SVR 5210 
						

							TL-130500-1001
NIC
FB-17242-ASVR 52107.5 The NIC (Network Interface Card) in coordination with a 
Tltrunk card set, allows PD-200 packet data to be sent over digital
common carrier lines to a remote PD-200 system. The card
contains two microprocessors. One microprocessor
communicates with the LPB., and the other with the PCM bus.
Mini-packets sent to the NIC card from the various peripherals
are converted to true X.25, HDLC-type (High-Level Data Link
Control) packets. These packets are in turn “chopped” into
seven or eight bit “chunks” and inserted into the backplane PCM
stream, much as a CODEC (Coder/Decoder) would. Then the
data is circuit switched to the 
Tl trunk card set for transmission
to a remote switch. This allows transcontinental networking of
PD-200 systems.
Conversely the NIC can receive “bursted” X.25 packets from the
PCM network. It can put these “bursted” pieces together and
then convert them into mini-packets. The mini-packets can
then be sent down the LPB to the packet router for distribution to
the various peripherals.
The NIC card requires a nailed connection.
8187s-1 19 
						

							TL-130500-1001
VPLC7.6 The VPLC (Voice Packet Line Card) used for data transfer
FB-17226-Aonly provides the interface between the system LPB, PEC bus,
and external synchronous/asynchronous packet managers.
The card has eight circuits and is software programmable as
either a type 0 or type 1 card.
l When programmed as type 0 (card type VPLO):- the card can use all of its eight circuits
- the card can transport asynchronous data at a rate of 19.2
Kbps (kilobits per second) and/or
- the card can transport synchronous data at a rate of 9.6
Kbps
l When programmed as type 1 (card type 
VPLl):
- the card can only use two of its eight circuits (due to power
restraints)
- the card can transport synchronous data at a rate of 64
Kbps and/or
- the card can transport asynchronous data at a rate of 19.2
Kbps
NOTE: Normally an unused circuit on a type 1 card would not be
used to support asynchronous data or low-speed synchronous
data, but can be used if required.
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							SW 5210TL-130500-1001
VPLCP7.7 The Voice Packet Line Card 2 is primarily used for voice
FB-17246-Aand data transfer interfacing the LPB, PEC bus, and 
DFPIAPM(Digital Featurephone with Asynchronous Packet Manager).
The card has eight circuits and can be software programmed as
either a type 0 or type 1 card:
l When programmed as type 0 (card type 
VP20):
- the card can use all of its eight circuits
- the card can transport asynchronous data (and voice) at a
rate of 19.2 Kbps, and/or
- the card can transport synchronous data (and voice) at a
rate of 19.2 Kbps
0 When programmed as type 1 (card type VP21):
- the card can only use two of its eight circuits (due to power
restraints)
- the card can transport synchronous data (and voice) at a
rate of 9.6-64 Kbps, and/or
- the card can transport asynchronous data (and voice) at a
rate of 19.2 Kbps
Table 7.2 provides a quick-reference chart of data card
functions and characteristics.
a/a7s-1 21 
						

							TL-130500-1001Table 7.2PD-200 Data Card Functions
r
cIF
IF
it
F
Functionoperates protocols needed to communicate over it.
‘B-l 
7230-BOATwo-card set)lControls administrative processing and file
management system interface.
oADMP-C is the only data card that does not
electrically connect to the LPB.
-B-l 7231 -A0Data call processing software is resident on this
board and communicates with other PD-200 cards
via the LPB.
lDual-function board which operates PD-200 data
switching features. Can also be used as PBT, to
terminate an LPB.
-8-l 722%BOA0Receives/transmits mini-packets on the two LPBswhile maintaining a continuous flow of data to/from
data switch users.
-B-l 7227-A
*Allows a packet router to gain access to the second
LPB which it is to control
-B-l 7242-A
*Also used to electrically terminate a LPB.
*Provides a link between the LPB and the system’s
PCM (voice switching) bus.
lAllows PD-200 packet data to be sent over digital
common carrier lines to a remote PD-200 system.
lProvides channel 
Tl carrier for data.
l Provides X.25 protocol.
lActs as a trunk and connects 
Tl from one OMNI SI
to 
Tl in another.
FB-17226-1A*Provides interface between APMSPM, LPB, and
PEC bus. The PEC connection provides control of
FB-17246
PMor 
DFP/APM to
S-l 22
8187SVR 5210