BT HERALD A AND 100B

See also Herald C

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Sales Brochure (A) - PHME10

Sales Brochure (100B) - PH3335

Herald A & 100B stored programme control Call Connect Systems were configured as a Keysystem or PBX in a Herald Assembly Centre using the Herald Software Support System (H3S). H3S software run on an early computer called a RAIR black box and used CPM as the DOS operating system.

The Herald 100B system, which was introduced nationally in April 1983 (Herald A was introduced in 1981), uses the B5 processor which differs from the Herald A processor as follows:-

• A single processor replaces the A processor and Memory Extension ASU's with increased memory capacity.

• Provides additional Operator facilities:-
  Answer Internal, Call offer, Night Service, Reverted Calls and Withdraw.

• Provides additional system facilities:-
  Change in the extension Class of Service giving more flexibility for Call Barring and Call Logging capability.

• One second time delay introduced for Answer Exchange button operation.

Herald A and l00B systems can be upgraded to provide Pentara Plus facilities by changing the top control shelf (Pentara Kit 1A/P). The customers data base and interface cards can be transferred from the A or l00B system direct into the replacement Pentara Plus control shelf on site without the need for a workshop visit or a data transfer over line.

The Cord Connection/s (l00W) moved from the old to new shelf and the system powered up and commissioned. The customer now has near identical circuit layout on terminals as previous, but Pentara Plus facilities. i.e. no `Lamps on/off' facility in Pentara which existed in Herald A/l00B.

The system can be tailored on site to meet the customer requirements. If facilities such as Display Terminals and Subscriber Private Metering are required, then the extension and exchange line interface cards will also need upgrading to the latest issue.

Standby power cannot be provided at Herald A, l00B or B8 systems, but is available for systems upgraded to Pentara Plus. If extension shelves are fitted it will also be necessary to upgrade the power units in those shelves to ASU/1A1/SA20554. These PSUs contain the necessary connection for the standby battery shelf.
It should be noted that Herald A-100B systems upgraded to B8 cannot be further upgraded as described above.

The upgrade path of a B8 system that has been HDS configured is as follows:-

1. Create a new customers data base on PDS at the Herald Data Entry workshop. (note. At present the existing data base cannot be edited).
2. Use normal method to enter PDS customer data into new CPU.
3. Change the top shelf i.e. provide and fit Pentara Plus Control Shelf.
4. Provide Auxiliary Box Connection 337A for Z lead connections.
5. Fit the loaded 256K CPU and interface cards into new control shelf. The position of the I/F cards is detailed in the Pentara Documentation system (PDS) provided by the Data Entry workshop.
6. If all Pentara facilities are required then the I/F cards and PSUs must be of the latest type.
7. Move the jumper wires within the Box Connection as necessary. It may be easier to recover the existing jumpers and provide new.
8. Power system up. Test and commission system.

From mid 1989 onwards it is anticipated that the upgrade path for B8 and C systems will be similar to that of the Herald A/l00B.

B8 Systems that were "self configured" are easier to upgrade than "HDS configured" systems. The control shelf has to be changed, an auxiliary Box Connection provided and the interface cards moved from the old to the new shelf keeping the same order. The programming plug is then inserted into the PBX or Keystream position to load the system data base. Completion of `Self Configuration' is indicated when the CPU LED darkens. All that is now required is to test and commission the system.

Made by Philips TMC Limited as the KBX100.

Herald A & l00B are approved for direct or indirect connection to the PSTN using LD or MF4 signalling by working as a (List B) subsidiary system connected to a (List C) PBX.
Recall can be Earth Loop or Timed Break.

Herald A was generally supplied with Herald HS or HL terminals. Although a 2 wire extension card was available, the system was sold by BT as a keysystem.

APPROVED SOFTWARE LEVELS
Herald A Processor ASU 1A1/SA 20001 are:-
Version D with IC31 marked 10.3.82
Herald l00B B5 Processor ASU 1A1/SA 20050 are:-
Version 5.9 ICs 14, 16 and 21 Marked V5.9
Version 5.A ICs 14, 16 and 21 Marked V5.A
Herald B8 Processor ASU 1A1/SA 20551 are:-
Version 8.3B
Version 8.4
Version 8.4A
Version 8.4C
Version 8.4D
Version 8.4E

Call Logging ASU 1A1/SA20572:-
Version 2.5
Version 2.7 (IC22 marked V2.5, V2.7 or V2.8)
Version 2.8

Speech Synthesis Card SA 20567:-
Version 3.1 (IC 3 marked V3.1)
Version 1.0 (IC 7 marked V1.0)
Version 1.2 (IC 7 marked V1.2)

Music on Hold Card SA 20568:-
Version 3.0 (IC 1 marked V3.C1)
Version 1.11 (The Entertainer) (IC 7 marked V1.0)
Version 2.0 (Greensleeves) (IC 7 marked V2.0)

Where necessary self configured systems should be configured to "Software Option Package" SOP 1 or SOP 2 as appropriate, and H35 and HDS configured systems should be loaded with the customer data held at the Herald Data Entry workshop.

Herald/Pentara was a BT portfolio product.

HERALD 100B - NEW FACILITIES
NS315 - June 1983

ANSWER INTERNAL
CALL LOGGING
CALL OFFER
NIGHT SERVICE
REVERTED CALLS
SINGLE DIGIT DIAL UP CODE TO OPERATOR
INTER PBX EXTENSION WORKING
TRANSFER
TRANSFER DIAL TONE TO EXTENSION

ANSWER INTERNAL
This facility shall allow calls from any extension to be answered by pressing an ANSWER INTERNAL key at the Operator's position.

Incoming internal calls which may or may not have an associated named intercom button are answered by pressing the 'ANSWER INTERNAL' function button at the Operator' s position.

Where more than one incoming call is present then each shall be answered in order of arrival. As the operator clears after each successive call the calling signal shall be reapplied for any internal call still waiting to be answered.

The operator shall be able to clear from a call by pressing the 'ANSWER INTERNAL' button, in which case the next internal caller shall immediately be connected.

Where 'ANSWER EXCHANGE' and 'ANSWER INTERNAL' are both provided then it is desirable that the audible signal for simultaneous incoming internal and external calls shall be of internal cadence. The operator shall then have the choice of which group to de-queue by pressing the appropriate key.

CALL LOGGING
The system shall provide a V24 output port to enable external Call Logging equipment such as a printer or call analysis equipment to be connected to the system. The port shall provide details of calls from extensions to trunk lines and their dialled digits, time and duration.

CALL OFFER
This facility shall supplement the existing intrude facility, which is unchanged, and shall allow an operator to enter into an established external call and speak to the existing parties.

The operator shall key or dial the required extension and shall receive busy tone if that extension is engaged. It shall then be possible for the operator to intrude on the existing callers by pressing the CALL OFFER function button.

A warning tone shall be superimposed on the three party conversation to indicate that the call is being intruded upon.

If the operator then goes on hook, the remaining parties shall resume the status of an established call and any warning tone shall be removed.

NIGHT SERVICE
This facility shall enable incoming exchange line calls at the operator's position to be diverted to alternative answering locations when the operator's position is unattended.

The operator's position shall be provided with a NIGHT SERVICE function button.

Successive operations of this button shall cause the function to be switched on or off.

When the night service function is switched on then all exchange line calls normally appearing on the operator's position shall be diverted to ring at a group of night service extensions.

The night service facility shall divert all exchange lines at the operator's position whether they be 'totally exclusive', 'normally exclusive' or 'shared'.

At any night; service extension the user shall be free to answer an incoming night. service call by lifting the handset whilst the extension is ringing with external cadence. The incoming caller shall then be connected to the extension user.

At extensions other than those in the night service group, the extension user shall be free to answer an incoming call by lifting the handset, and keying 8 whilst listening to internal dial tone. Should the call have already been answered the system shall return busy tone.

Audible and visual signals shall continue unchanged at the operator's position when the night service function is switched on.

REVERTED CALLS
The system shall provide a Reverted Calls key at the operator's position to indicate that a call has been reverted to the operator following the time out of the camp on busy or ringing facility.

Reverted calls shall cause the LED associated with the Reverted calls key to flash. The operator shall be connected to the reverted caller upon pressing the key. If more than one call is reverted simultaneously the facility shall cause the callers to he de-queued for each depression of the Reverted Calls key.

SINGLE DIG1T DIAL UP CODE TO OPERATOR (0)
The system shall provide for single digit dial up access from internal extensions to the operator.

The system shall recognise a nominated extension as being the operator's position.

Dialling the operator access code shall be recognised by the system both for internal cal Is to the operator and for programming the operator as a nominated extension.

INTER PBX EXTENSION WORKING
The system shall permit the operator or extension user to transfer exchange line calls over an inter PBX Extensions to a distant extension. The called extension shall be required to answer before the transfer is completed.

It shall not be possible to transfer incoming private circuit calls to an exchange I inc.

TRANSFER
This facility shall allow the operator to transfer an external trunk call to another extension.

Three forms of transfer are required - transfer after Called Subscriber answered, transfer on ringing and transfer on busy.

In order to initiate a transfer the operator shall place the call into the HOLD state and then make an intercom call to any other extension.

On receiving ring tone or busy tone the operator shall have a choice of actions as follows:-

Ring tone returned: The operator may EITHER listen until the required extension answers, replace his handset and the call shall then be transferred as required OR the operator may press the WITHDRAW key whilst listening to. return ringing and the caller shall be camped on ringing to be transferred when the required extension answers. The system shall return dial tone to the operator after pressing the WITHDRAW key.

Busy tone returned: The operator may EITHER press the cradle switch and the HOLD button to inform the caller that the required extension is busy, OR may press the WITHDRAW key whilst listening to busy tone and the caller shall he camped on busy to be transferred on ringing when the required extension becomes free. The system shall return dial tone to the operator after pressing the WITHDRAW key.

If whilst camped on ringing or busy, the called extension does not answer or become free within 30 seconds the call shall revert to the operator (on the REVERTED CALLS key) and shall cancel the camp on busy or camp on ringing. If the caller become free during the 30 second camp on busy period, the call shall ring the extension for a minimum of 10 seconds.

If during the period of being camped on busy the required extension becomes free, the extension shall begin ringing and the caller shrill then be camped on ringing. When answered the caller shall be connected to permit the caller and required extension user to converse. If however, after becoming free the required extension does not; answer within 30 seconds the caller shall be reverted to the operator in the normal manner.

If the call is reverted to the operator the call shall flash the REVERTED CALLS lamp and shall be answered by pressing that key.

The enquiry call shall ring the required extension with internal cadence. When the operator CAMPS the caller onto an unanswered extension, the call shall be placed at the end of any queue of transferring calls, but before the queue of any external calls ringing at the called extension. The cadence shall also change to external cadence.

The facility to transfer on ringing or busy shall not be permitted for transferred internal calls or private circuit calls. In these cases the operator shall have to wait until the required extension answers.

All transferred calls shall be subject to Divert if the required extension is in that state.

The transfer procedure shall be capable of repeated use on any one call.

There shall be no restriction on the number of calls in the process of being transferred at any one time

Control of the call shall be transferred with that call.

TRANSFER DIAL TONE FROM OPERATOR'S POSITION
The system shall allow the operator to transfer an external interface dial tone to an extension user and to override any normal barring arrangements at that extension in order that the extension user may make a single external call.

The operator shall put the extension user into HOLD and the select on interface by dialling 9 or pressing a dedicated line button. The operator shall then go on hook and the dial tone shall be transferred to the extension user.

This facility shall also allow the operator to select an external line (and overcome any barring arrangements) when an extension user calls the operator to request a line. The operator shall put the extension in hold and then select a line. When the operator hangs up the extension user shall receive external dial tone and shall be free to make a single call.

OPERATOR POSITION CONFIGURATION
A Herald HL terminal shall be provided as an Operator's position.

The Operator's position shall provide the following facilities:-

• De-queuing of external and internal calls.

• Hold

• Intrusion (Call Offer)

• Keyed Access to Extensions

• Named Intercom

• Night Service

• Optional Headset Operation

• Recall Parent Exchange

• Repeat Last number

• Repertory Dial

• Reverted Calls

• Sounder On/Off

• Inter PBX Extension Working

• Transfer of calls

• Transfer Dial Tone to extensions

• Trunk Access

The Operator's position shall be configured by the system shown below:-

All the Named Intercom keys shall be reconfigurable as LINE keys, PRIVATE CIRCUIT keys, or facility keys by means of the inter-active installation programme (H33).

The following equipment is available for a system upgrade to Pentara Plus:-

ITEM DESCRIPTION                                    	BT ITEM CODE
Pentara Kit 1A/P Comprising (Version l0.0 Upgrade)  		375525
Herald Eqmt Unit SA 20560 Control Unit             		374741
ASU 1A1/SA 20579 (256K CPU)                         		375526
ASU 1A1/SA 20553 (CPSU)                             		374714
Cord Connection D94196                               		512215
Cord Connection D95487
Box Connection 337A (Aux box for connecting Z lead)  		375547
ASU 1A1/SA 20557       	4W Extn LIF-4-Ccts           		374717
ASU 1A1/SA 20558       	Exch line LIF 2 Ccts F/F     		374715
Battery Shelf 1/SA 20573   Contains Alarm Card      		374742
Battery Secondary No. 30   For use with Batt Shelf  		374743
ASU 1A1/SA 20554       Extn Shelf PSU               		374713

The following equipment is available for the extension of Herald A, l00B
and B8 systems
ASU 1A1/SA 20006       	4W Extn I/F-4 Ccts           		373279
ASU 1A1/SA 20007       	2w Extn I/F-8 Ccts           		373280
ASU 1A1/SA 20556      	2w Extn I/F-8 Ccts           		374718
ASU 1A1/SA 20557       	4W Extn I/F-4 Ccts           		374717
ASU 1A1/SA 20008       	Exch line I/F 2 Ccts         		373281
ASU 1A1/SA 20558       	Exch line I/F 2 Ccts F/F     		374715
ASU 1A1/SA 20559       	Exch line I/F 4 Ccts         		374716
ASU 1A1/SA 20010       	SSDC 5/10 PBX I/F 2 Ccts     		373282
ASU 1A1/SA 20555       	SSAC 15 PBX I/F 1 Cct        		374720
ASU 1A1/SA 20011       	External Conf Unit           		374744
ASU 1A1 SA 20565       	Options Mother Board         		374721
ASU 1A1 SA 20572       	Call Logging Unit            		374726
Card SA 20566          	MF4 Option                   		374722
Card SA 20567          	Speech Synthesis Option      		374719
Card SA 20568          	Music on Hold Option         		374723
Card SA 20569          	Modem Option                 		374724
Card SA 20571          	Broadcast Option            		374725
Amplifier & Loudspeaker 13A (amp for TX5l/52)       		373283
TX 52 3/SA 20014 Brn/Lt Brn   Power Fail            		411015
TX 52 3/SA 20014 Stone        Power Fail            		375236
TX 55A Stone            Term with 7 Butts           		375166
TX 56A Stone            LS Term with 7 Butts        		375168
TX 57A Stone            LS Term with 18 Butts       		375170
TX 58A Stone            LS/Display with 18 Butts    		375172

The following equipment was available for maintenance. Some items are now
only available as repaired or refurbished equipment.
Herald Kit SBS No 1   	Control Shelf & Equipment     	373276
Herald Kit SBS No 2   	Extn Shelf & Power Unit      	373277
Equipment SBS 1/SA 20000     Control Shelf          	373285
Equipment SBS 2/SA 20000     Extn Shelf             	373286
ASU 1A1/SA 20001     	A Processor                    	373287
ASU 1A1/SA 20002     	Memory Extn Board              	373278
ASU 1A1/SA 20550     	B8 Processor                   	374507
ASU 1A1/SA 20551     	B8 Processor V8.3A             	374711
ASU 1A1/SA 20551-1   	B8 Processor V8.4              	375161
ASU 1A1/SA 20003     	Tone Generator                 	373288
ASU 1A1/SA 20007     	2W Extn I/F 8 Ccts             	373280
ASU 1A1/SA 20556     	2W Extn I/F 8 Ccts             	374718
ASU 1A1/SA 20006     	4W Extn I/F 4 Ccts             	373279
ASU 1A1/SA 20557     	4W Extn I/F 4 Ccts             	374717
ASU 1A1/SA 20558     	Exch Line I/F 2 Ccts F/F       	374715
ASU 1A1/SA 20008     	Exch Line I/F 2 Ccts           	373281
ASU 1A1/SA 20559     	Exch Line I/F 4 Ccts           	374716
ASU 1A1/SA 20010     	SSDC 5/10 PBX I/F 2 Ccts       	373282
ASU 1A1/SA 20555     	SSAC 15 PBX I/F 1 Cct          	374720
ASU 1A1/SA 20011     	Extnl Conf Unit                	374744
ASU 1A1/SA 20565     	Options Mother Board           	374721
ASU 1A1/SA 20572     	Call Logging Unit              	374726
Card SA 20566        	MF4 Option                     	374722
Card SA 20567        	Speech Synthesis Option        	374719
Card SA 20568        	Music on hold Option           	374723
Card SA 20569        	Modem Option                   	374724
Card SA 20571        	Broadcast Option               	374725
ASU 1A1/SA 20554     	Extn Shelf PSU                 	374713
ASU 1A1/SA 20013     	Extn Shelf PSU                 	373284
ASU 1A1/SA 20005     	DC/DC PSU                      	373289
Amp & Loudspeaker 13A 	(Waiting amp for TX51/52)     	373283
Tele 4/SA 20012      	TX 51 D/L Brn                   411027
Tele 4/SA 20012      	TX 51 GY/L BN                  	411028
Tele 4/SA 20012      	TX 51 Grey                    	411029
Tele 4/SA 20012      	TX 51 Grey                    	411030
Tele 6/SA 20012      	TX 51 DL Brn                    374246
Tele 6/SA 20012      	TX 51 GY/L Brn                  374247
Tele 6/SA 20012      	TX 51 GY/OR                    	374248
Tele 6/SA 20012      	TX 51 GY/GY                    	374249
Tele 2/SA 20561      	TX 51 D/L Brn (HIT)             374727
Tele 2/SA 20561      	TX 51 GY/L Brn (HIT)            374728
Tele 2/SA 20563      	TX 53 D/L Brn (LST HIT)         374731
Tele 2/SA 20563      	TX 53 GY/L Brn (LST HIT)        374732
Tele 2/SA 20014      	TX 51 D/L Brn (Power Fail)      41O556
Tele 2/SA 20014      	TX 51 GY/L Brn (Power Fail)     410557
Tele 2/SA 20014      	TX 51 GY/OR (Power Fail)       	410558
Tele 2/SA 20014      	TX 51 GY/GY (Power Fail)       	410559
Tele 4/SA 20014      	TX 51 D/LBN (Power Fail)       	411019
Tele 4/SA 20014      	TX 51 GY/L Brn (Power Fail)     411020
Tele 4/SA 20014      	TX 51 GY/OR (Power Fail)       	411021
Tele 4/SA 20014      	TX 51 GY/GY (Power Fail)       	411022
Tele 3/SA 20012      	TX 52 DL Brn                    411023
Tele 3/SA 20012      	TX 52 GY/L Brn                  411024
Tele 3/SA 20012      	TX 52 GY/OR                    	411025
Tele 3/SA 20012      	TX 52 GY/GY                    	411026
Tele 5/SA 20012      	TX 52 DL Brn                    374242
Tele 5/SA 20012      	TX 52 GY/L Brn                  374243
Tele 5/SA 20012      	TX 52 GY/OR                    	374244
Tele 5/SA 20012      	TX 52 GY/GY                    	374245
Tele 1/SA 20014      	TX 52 DL Brn (Power Fail))      410552
Tele 1/SA 20014      	TX 52 GY/L Brn (Power Fail)     410553
Tele 1/SA 20014      	TX 52 GY/OR (Power Fail)       	410554
Tele 1/SA 20014      	TX 52 GY/GY (Power Fail)       	410555
Tele 3/SA 20014      	TX 52 DL Brn (Power Fail)       411015
Tele 3/SA 20014      	TX 52 GY/L Brn (Power Fail)     411016
Tele 3/SA 20014      	TX 52 GY/OR (Power Fail)       	411017
Tele 3/SA 20014      	TX 52 GY/GY (Power Fail)       	411018
Tele TX 54 Brown     	Operators Term                 	374733
Tele TX 54 Stone     	Operators Term                 	391286
Tele TX 55 Brown     	Term with 7 Butts              	374946
Tele TX 55 Stone     	Term with 7 Butts              	374947
Tele TX 56 Brown     	LS Term 7 Butts                	374948
Tele TX 56 Stone     	LS Term 7 Butts                	374949
Tele TX 57 Brown     	LS Term 18 Butts               	374942
Tele TX 56 Stone     	LS Term 7 Butts                	374949
Tele TX 57 Brown     	LS Term 18 Butts               	374942
Tele TX 57 Stone     	LS Term 18 Butts               	374943
Tele TX 58 Brown     	LS Term 18 Butts & Display     	374944
Tele TX 58 Stone     	LS Term 18 Butts & Display     	374945
Tele TX 54A Stone    	Operators Term                 	375256
Tele TX 55A Stone    	Term with 7 Butts              	375166
Tele TX 56A Stone    	LS Term 7 Butts                	375168
Tele TX 57A Stone    	LS Term 18 Butts               	375170
Tele TX 58A Stone   	LS Term 18 Butts & Display     	375172
tele TX 54A Grey     	Operators Term                 	375531
Tele TX 55A Grey     	Term with 7 Butts              	375527
Tele TX 56A Grey     	LS Term with 7 Butts           	375528
Tele TX 57A Grey     	LS Term with 18 Butts          	375529
Tele TX 58A Grey     	LS/Display with 18 Butts       	375530
cable Connection 1/D94l91    34W Ribbon Cable 1st shelf 435857
Cable Connection 1/D94192    40W Ribbon Cable 1st shelf 435858
cable Connection 3/D95488    Batt Harness 3rd Shelf     391275
Cable Connection 1/D95003    Cable Form B/C 330A/331A   374520
Cable Connection 2/D95003    Cable Form B/C 331A        374521
Cord Connection D/94196      100W, 3000mm Cord          512215
Cord Connection D/94195      240v Mains interconnect    512222
Adapter 60A.            Impedance matching module     	
Adapter 61A.            Impedance matching module     	391293
Kit 705A.               Overvoltage Protection Module 	391319

FUSES
Power Unit 1A1/SA 20554 No field replaceable fuses.
Power Unit 1A1/SA 200l3   FS1   72/3.15
                          FS2 and FS3  73/5
                          FS4   72/0.25
Mains Plug fuse 7 Amp (Standard Type)
Tone Unit 1A1/SA 20013    FS1 and FS2   73/3.15

TESTERS
ITEM   	                          			BT Item Code
Testers 364A (formerly Herald Audio Tester)         	314566
Card test 4B (Highway Tester)                       	314700
Test Access Unit 8A (Now obsolete, superseded-by)   	314300
Modem Card SA 20569 or                              	374724
Datelphone 4122 or                                  	251493
Datel Modem 4124X                                   	251583
Datel Unicase 4001HX for Datel Modem 4124X          	251630

ADDITIONAL INFORMATION
Traffic capacity of any size of system is 20 simultaneous calls.
Traffic through any size system should not exceed 12 Erlangs.

When a Herald A or l00B is upgraded on-site to Pentara Plus, it is essential that the interface cards are moved to the new shelf in the precise manner as indicated below.

             Herald                       Pentara + Plus
              1/5                              1/2
              1/6                              1/3
              1/7                              1/4
              1/8                              1/5
              1/9                              1/6

The reasons for this are:-
1. With an A/l00B upgrade the CPU allocates port facilities as determined from the
original data held within the existing CPU. 2. The Box Connection jumpering is compatible 
with the revised data 
entered into the new CPU, therefore no adjustments are required.

If any of the following options are required, insert the appropriate cards as follows:-

ITEM                          SLOT
Option board                  1/7 1 to 3 MF4 receivers
Option board                  1/8
                              Circuit A - Speech synthesis card
                              Circuit B - Broadcast card
                              Circuit C - Modem card
Call logging/RTclock          1/9

Reconnect the 100-way cables as follows:-
     PLA on A/B5 to PLZ Pentara
     PLB on A/B5 to PLA
     PLB to auxiliary Box Connection 337A

 PARTS LIST 

Last revised: September 02, 2025