REFTA - AMO-REFTA

REFTA - Reference Clock Table

With the AMO REFTA digital line circuits assigned by the AMOs SBCSU or TDCSU, DIUC and DIUC64 modules assigned by the AMO BCSU are entered into the reference clock table . In this way all digital line circuits of the system are registered in the reference clock table. Additionally a new clock supplier, the front reference, and the external box may be registered in the reference clock table. The latter improves the quality of the clock in use.
Whenever a communication system is in operation within a digital network synchronization of all network components becomes necessary.
For systems with digital (hence synchronous) connections to other systems or to the public network all systems must have a synchronized clock.
For this reason all systems possess a clock generator synchronized to the line circuit or front reference respectively offering the "highest quality" clock i.e. the public network connection or possibly a connection to another system in the network.
A record of this information is provided in the form of an administrable table within the dependability complex. This reference clock table lists the current system status, i.e. which line circuits are possible suppliers of reference clock, whether the particular line circuit or front reference is the current supplier of reference clock or is blocked as a possible supplier, the priority of the line circuit or front reference and an error counter.
The line circuit or front reference priorities and the blocking information are directly administered by the AMO REFTA, whereas the error counters and the ID current reference clock supplier are determined by dependability.
The error counters which are maintained during operation provide an indication of the quality of a given link. Thus the best link can be chosen if there are two or more with the same priority.

Note:
For detailed information look at SHB part 2, chapter Networking, Networking Synchronisation.

Restrictions
This description is valid from HiPath 4000 V1.0.

Cross Reference to Other AMOs:

AMO BCSU Board configuration, switching unit Set of the circuit TMDN_BOS in the REFTA-list
AMO BSSU Board switch, switching unit
AMO DSSU Device switch of switching unit
AMO SBCSU Station and S0-bus configuration of switch. unit
AMO TACSU Configuration of analog trunk circuits in the SWU
AMO TDCSU Configuration of digital trunk circuits in the SWU

The following configuration sequence should be kept: BCSU ==> REFTA ==> [TDCSU, TACSU]

Destination Processor: BP (Switching Unit)

Functions

ADD ADD REFTA password class 2
CHANGE CHANGE REFTA password class 2
DIALOG01 (internal)password class 2
DELETE DELETE REFTA password class 2
DIALOG02 (internal)password class 2
REGENERATE REGENERATE REFTA password class 2
DISPLAY DISPLAY REFTA password class 0

Procedure Overview

ADD-REFTA

ADD-REFTA
TYPE=CIRCUIT,PEN=<number>, [PRI=<number>], [BLOCK=<param>], [READYASY=<param>];
TYPE=FRONT,[PRI=<number>], [BLOCK=<param>], [LTU=<number>];
TYPE=AECB,[CLASS=<number>];

ADD-REFTA

The function ADD-REFTA is used to enter front reference, the external clock box or digital circuits of the modules TMDN, DIUS2, CDG, STMD, DIUC or DIUC64 into the reference clock table. The STMA board and circuit 0 of TMDN_BOS will be added by AMO BCSU. These can only be changed by AMO REFTA. Trunks may be configured on these modules by the AMOs TDCSU/SBCSU (TMDN_MOS, DIUS2, CDG, STMA, STMD) and TACSU (TMDN_BOS, DIUC and DIUC64). Each digital trunk of the system should be entered into the reference clock table in order that the error counter can be maintained by dependability.
Digital trunks of the AMO TDCSU which is not contained in the reference clock table at the time of their configuration are entered into the table by the configuration AMOs, with PRI=0 and BLOCK =N.
For a TMDN_BOS and DIUC and highway 1 for a DIUC64 the reference clock is maintained on circuit 0 resp. circuit 32 for highway 2 of DIUC64. These lines will be configured at the time of module configuration by the AMO BCSU, and will be put into service automatically at the time of entering in the reference clock table.
If a trunk is to be configured by AMO TACSU on the DIUC or DIUC64 module and circuit 0 resp. 32 of this module is not contained in the reference clock table, the AMO TACSU enters the circuit automatically into the table with PRI=0 and BLOCK=N.
AMO-BCSU enters the circuit 0 of TMDN_BOS into REFTA table - this is a virtual circuit and can not be configured by AMO-TACSU.
Station lines of the AMO SBCSU does not need to be entered in the reference clock table. In these cases the error counters are ignored by the dependability system.
Station lines of the AMO SBCSU is not entered automatically at the time of their configuration.
The AMO REFTA checks whether an appropriate module is connected at the specified PEN and enters the circuit PEN in an available element of the reference clock table.
If PRI is specified, the limits for the module should be observed. If PRI is not specified, the default value 0 is put in the reference clock table.
If the trunk should be considered for the search of the optimal supplier of reference clock, BLOCK=Y should not be set when the ADD function is run.
If the external clock box will be added in the reference clock table, its value for parameterCLASS must be one of the following numbers: 38, 68, 78. Standard value is 38.

CHANGE-REFTA

CHANGE-REFTA
TYPE=CIRCUIT,PEN=<number>, {(min 1) PRI=<number>, BLOCK=<param>, READYASY=<param>, ERROR=<number>};
TYPE=FRONT, {(min 1) PRI=<number>, BLOCK=<param>, ERROR=<number>, LTU=<number>};
TYPE=AECB,CLASS=<number>;

CHANGE-REFTA

With the CHANGE-REFTA function it is possible to change the parameters PRI and/or BLOCK for a digital reference clock circuit or frontreference if already contained in the reference clock table.
If the PRI parameter is to be reset to 0 and/or the BLOCK parameter is to be set to Y using the CHANGE function the AMO checks whether the last reference clock supplier is involved. In this case DIALOG queries whether PRI should be set to 0.
If PRI=0 is to be changed to PRI>0 or vice-versa the trunk must be blocked with the AMO DSSU before. Once the PRI value has been changed the trunk can be put into service again with the same AMO.
Special conditions apply to circuit 0 on DIUC or TMDN_BOS modules and circuit 0 and 32 on the DIUC64 modules. In these cases the AMO REFTA is used to block the trunks and to unblock them after the PRI value has been changed.

DIALOG01-REFTA

DIALOG01-REFTA DIALOG01=<param>;

DELETE-REFTA

DELETE-REFTA
TYPE=CIRCUIT,PEN=<number>;
TYPE=FRONT,[LTU=<number>];
TYPE=AECB;

DELETE-REFTA

With the function DELETE-REFTA a digital circuit, a front reference or the external clock box can be removed from the reference clock table if contained in there.
If the adressed reference clock circuit or front reference happens to be the current supplier of the reference clock DELETE is not permitted until a new supplier of the reference clock has been provided with the BLOCK mark using the action CHANGE.
Digital trunks on TMDN_MOS, DIUS2, CDG and STMD modules being configured by the AMO TDCSU cannot be removed from the reference clock table (F24) whereas station lines (configured by AMO SBCSU) can.
Digital trunks on STMA cannot deleted by AMO REFTA, only by AMO BCSU.
If the last reference clock supplier is to be deleted the user will be asked for confirmation.
The reference clock circuit of DIUC or DIUC64 module can only be removed from the reference clock table if no trunk is configured on this module by the AMO TACSU.
If the reference clock circuit of DIUC or DIUC64 module is to be removed from the reference clock table the AMO REFTA will deactivate the circuit (state NEQ).

DIALOG02-REFTA

DIALOG02-REFTA DIALOG02=<param>;

REGENERATE-REFTA

REGENERATE-REFTA
[TYPE=CIRCUIT],[PEN=<number>];
[TYPE=FRONT],[LTU=<number>];
[TYPE=AECB];

REGENERATE-REFTA

With the function REGENERATE-REFTA the add commands for the digital circuits, front reference and external box contained in the reference clock table are shown. For the trunks of STMA board change commands are output. Output will be sorted ascendingly by PRI.

DISPLAY-REFTA

DISPLAY-REFTA
[TYPE=CIRCUIT],[PEN=<number>], [KIND=<param>];
[TYPE=FRONT],[LTU=<number>];
[TYPE=AECB];
[TYPE=SRCGRP],[SRCGRP=<number>];

In addition to data output from the add command the function DISPLAY-REFTA also contains output of the corresponding modules and device types as well as data from dependability e.g. the error counter for the reference clock circuits and frontreference and an ID whether the supplier is the current supplier of reference clock. Output is sorted ascendingly according to PRI and sorted in descending order according to error count.
Furthermore for external clock box the values of current class and the equipped class will be displayed in a separate table.

Example:


Interrogate the reference clock circuits of LTG 1 (partially qualified input).

Input:

DISP-REFTA:TYPE=CIRCUIT,,;

Output: 
DISP-REFTA:CIRCUIT,,;
 
H500:  AMO REFTA STARTED
    +-------------------------------------------------------------------------+
    |           R E F E R E N C E   C L O C K   C I R C U I T S               |
    +--------------+---------+----------+---+------+------+------+-----+------+
    | PEN          | MODULE  | DEVICE   |PRI|ERROR |BLOCK |SUPP. |READY|SRCGRP|
    |              |         |          |   |      |      |      |BUT  |      |
    |              |         |          |   |      |      |      |ASYN.|      |
    +--------------+---------+----------+---+------+------+------+-----+------+
    |  1- 2- 97- 0 | DIUS2   | S2CONN   |  0| 16000|    N |      |  N  |     1|
    |  1- 2- 97- 1 | DIUS2   | S2CONN   |  0| 16000|    N |      |  N  |     1|
    |  1- 2-121- 1 | STMD    | S0COD    | 20| 15200|    N |      |  N  |     1|
    |  1- 2-121- 2 | STMD    | S0COD    | 20| 15200|    N |      |  N  |     1|
    |  1- 2-121- 3 | STMD    | S0COD    | 20| 15200|    N |      |  N  |     1|
    |  1- 2-121- 4 | STMD    | S0COD    | 20| 15200|    N |      |  N  |     1|
    |  1- 2-121- 5 | STMD    | S0COD    | 20| 15200|    N |      |  N  |     1|
    |  1- 2- 61- 1 | DIU-N4  |          | 80| 16000|    N |      |  N  |     1|
    |  1- 2-115- 1 | DIUS2   |          | 80| 16000|    N |      |  N  |     1|
    |  1- 2- 61- 2 | DIU-N4  |          | 80| 16000|    N |      |  N  |     1|
    |  1- 2- 61- 3 | DIU-N4  |          | 80| 16000|    N |      |  N  |     1|
    |  1- 2- 79- 0 | DIUS2   | S2CONN   | 80| 15200|    N |      |  N  |     1|
    |  1- 2- 79- 1 | DIUS2   | S2CONN   | 80| 15200|    N |      |  N  |     1|
    |  1- 2- 85- 0 | DIUS2   | S2CONN   | 80| 15200|    N |      |  N  |     1|
    |  1- 2- 85- 1 | DIUS2   | S2CONN   | 80| 15200|    N |      |  N  |     1|
    |  1- 2-115- 0 | DIUS2   | S2COD    | 88| 16000|    N |      |  N  |     1|
    |  1- 2-121- 0 | STMD    | S0COD    | 90| 35200|    N |      |  N  |     1|
    +--------------+---------+----------+---+------+------+------+-----+------+
 AMO-REFTA-254       REFERENCE CLOCK TABLE                                     
 DISPLAY COMPLETED;
   <

Notice for the column DEVICE:

1. If a station line (AMO SBCSU) is configured at a PEN, then this is marked by "STN-DEV" (station device).
2. Blanks for STMD, DIUS2 and TMDN_MOS modules means: No device configured at this PEN.
3. Blanks will always be output for TMDN_BOS/DIUC/DIUC64 modules (because different devices can be assigned on TMDN_BOS/DIUC/DIUC64).

Example:

Interrogate the reference clock circuits source group oriented.

Input:

DISP-REFTA:SRCGRP,;

Output: 
H500:  AMO REFTA STARTED
    +-------------------------------------------------------------------------+
    |           R E F E R E N C E   C L O C K   C I R C U I T S               |
    +--------------+---------+----------+------+--------+------+--------+-----+
    |PEN           | MODULE  | DEVICE   | PRI  | ERROR  |BLOCK | SUPP.  |READY|
    |--------------|         |          |      |        |      |        |BUT  |
    |SRCGRP:  1    |         |          |      |        |      |        |ASYN.|
    +--------------+---------+----------+------+--------+------+--------+-----+
    |  1- 2- 61- 0 | DIU-N4  | S2CONN   |   80 |  16000 |    N |        |  N  |
    |  1- 2- 61- 1 | DIU-N4  |          |   80 |  16000 |    N |        |  N  |
    |  1- 2- 61- 2 | DIU-N4  |          |   80 |  16000 |    N |        |  N  |
    |  1- 2- 61- 3 | DIU-N4  |          |   80 |  16000 |    N |        |  N  |
    |  1- 2- 79- 0 | DIUS2   | S2CONN   |   80 |  15200 |    N |        |  N  |
    |  1- 2- 79- 1 | DIUS2   | S2CONN   |   80 |  15200 |    N |        |  N  |
    |  1- 2- 85- 0 | DIUS2   | S2CONN   |   80 |  15200 |    N |        |  N  |
    |  1- 2- 85- 1 | DIUS2   | S2CONN   |   80 |  15200 |    N |        |  N  |
    |  1- 2- 91- 0 | DIUS2   | S2CONN   |   80 |  16000 |    N |        |  N  |
    |  1- 2- 91- 1 | DIUS2   | S2CONN   |   80 |  16000 |    N |        |  N  |
    |  1- 2- 97- 0 | DIUS2   | S2CONN   |    0 |  16000 |    N |        |  N  |
    |  1- 2- 97- 1 | DIUS2   | S2CONN   |    0 |  16000 |    N |        |  N  |
    +-------------------------------------------------------------------------+
    |           R E F E R E N C E   C L O C K   C I R C U I T S               |
    +--------------+---------+----------+------+--------+------+--------+-----+
    |PEN           | MODULE  | DEVICE   | PRI  | ERROR  |BLOCK | SUPP.  |READY|
    |--------------|         |          |      |        |      |        |BUT  |
    |SRCGRP:  8    |         |          |      |        |      |        |ASYN.|
    +--------------+---------+----------+------+--------+------+--------+-----+
    |  1- 21-121- 0| TMDN-MOS|          |   80 |  16000 |    N |        |  N  |
    +--------------+---------+----------+------+--------+------+--------+-----+
  AMO-REFTA-254       REFERENCE CLOCK TABLE                                     
 DISPLAY COMPLETED;
   <

Notice for the column SUPPLIER:

The reference clock table consists of the configured reference clock circuits which are candidates for a reference clock selection if PRIO>0.
A selected reference clock circuit is marked with an "X" in the SUPPLIER column of the reference clock table.
There is at most one "X" in the reference clock table for all reference clock circuits of all the host shelves (LTUs 1 - 15). The RTM clock generator synchronizes the system clock for all the boards in the host shelves to the selected reference clock supplier.
There is at most one "X" in the reference clock table for all reference clock circuits of a single AP (17 - 99) with an NCUI. The NCUI clock generator synchronizes the system clock for all the boards in the AP shelf to the selected reference clock supplier.
In a Softgate using HPA modules, the preference is for each HPA module to use a local available clock for each board if one is available. This is because a local reference clock supplier on each board is deemed as more reliable than the clock for the whole shelf. So again there will be at most one "X" in the reference clock table for each Softgate, which is used as the clock master for all modules without an own clock reference (e.g. SLMAE/SLMO etc). Additionally however, for any further module using a local reference clock supplier (e.g. DIUT2/STMD) the selected reference clock supplier will be marked with a "*".

Example:

DISP-REFTA:TYPE=CIRCUIT,KIND=ACT;
H500:  AMO REFTA STARTED
    +-------------------------------------------------------------------------+
    |           R E F E R E N C E   C L O C K   C I R C U I T S               |
    +--------------+---------+----------+---+------+------+------+-----+------+
    | PEN          | MODULE  | DEVICE   |PRI|ERROR |BLOCK |SUPP. |READY|SRCGRP|
    |              |         |          |   |      |      |      |BUT  |      |
    |              |         |          |   |      |      |      |ASYN.|      |
    +--------------+---------+----------+---+------+------+------+-----+------+
    |  1-17-  4- 0 | DIUT2   | S2CONN   | 73| 16000|    N |     X|  N  |     1|
    |  1-19-  2- 0 | DIUT2   | S2CONN   | 74| 16000|    N |     *|  N  |     2|
    |  1-19-  3- 1 | DIUT2   | S2CONN   | 74| 16000|    N |     *|  N  |     2|
    |  1-19- 10- 0 | DIUT2   | S2CONN   | 75| 16000|    N |     X|  N  |     2|
    |  1- 2-115- 0 | DIU-N2  | S2AMT    | 88| 16000|    N |     X|  N  |     1|
    +--------------+---------+----------+---+------+------+------+-----+------+
 AMO-REFTA-243       REFERENCE CLOCK TABLE                                     
 DISPLAY COMPLETED;
   <

In this example the circuit 1-2-115-0 has been selected as reference clock supplier "X" for the host shelves.
The circuit 1-17-4-0 has been selected "X" for AP 17 (with NCUI).
AP 19 is a softgate with 3 HPA modules with a reference clock board DIUT2. For each HPA module a circuit has been selected "*" (1-19-2-0, 1-19-3-1, 1-19-10-0).
The circuit 1 -19-10-0 has also been selected as clock master "X" for the remaining HPA modules of AP 19.

Parameter description

BLOCK temporary blocking of trunk as reference clock supplier
Type of Input: single value, 2. parameter of a min-1-group (CHANGE,TYPE=CIRCUIT-normal circuits or boards with cable interface / CHANGE,TYPE=FRONT-front reference)
single value, optional (ADD,TYPE=CIRCUIT-normal circuits or boards with cable interface / ADD,TYPE=FRONT-front reference)
Possible Values: N no
Y yes
CLASS class of clock generator
Type of Input: single value, mandatory (CHANGE,TYPE=AECB-external clock box)
single value, optional (ADD,TYPE=AECB-external clock box)
Possible Values: numeric, 0-255
DIALOG01 hidden action: dialog01, acknowledge for change (y/n)
Type of Input: single value, mandatory
Possible Values: N no
Y yes
DIALOG02 hidden action: dialog02, acknowledge for delete (y/n)
Type of Input: single value, mandatory
Possible Values: N no
Y yes
ERROR error counter; standard value is 16000
Type of Input: single value, 3. parameter of a min-1-group (CHANGE,TYPE=FRONT-front reference)
single value, 4. parameter of a min-1-group (CHANGE,TYPE=CIRCUIT-normal circuits or boards with cable interface)
Possible Values: numeric, 0-65535
KIND type of output (all,act)
Type of Input: single value, optional
Possible Values: ACT actual reference clock supplier
ALL all reference clock circuits
LTU LTU number
Type of Input: single value, 4. parameter of a min-1-group (CHANGE,TYPE=FRONT-front reference)
single value, optional (ADD,TYPE=FRONT-front reference / DELETE,TYPE=FRONT-front reference / DISPLAY,TYPE=FRONT-front reference / REGENERATE,TYPE=FRONT-front reference)
Possible Values: numeric, 0, 17-99
PEN port equipment number: ltg-ltu-slot-cct
Type of Input: 0 to 4 single values, concatenated with -, optional (DISPLAY,TYPE=CIRCUIT-normal circuits or boards with cable interface / REGENERATE,TYPE=CIRCUIT-normal circuits or boards with cable interface)
4 single values, concatenated with -, mandatory (ADD,TYPE=CIRCUIT-normal circuits or boards with cable interface / CHANGE,TYPE=CIRCUIT-normal circuits or boards with cable interface / DELETE,TYPE=CIRCUIT-normal circuits or boards with cable interface)
Possible Values: numeric, 0-121
PRI priority of trunk for reference clock selection
Type of Input: single value, 1. parameter of a min-1-group (CHANGE,TYPE=CIRCUIT-normal circuits or boards with cable interface / CHANGE,TYPE=FRONT-front reference)
single value, optional (ADD,TYPE=CIRCUIT-normal circuits or boards with cable interface / ADD,TYPE=FRONT-front reference)
Possible Values: numeric, 0, 11-90 (ADD,TYPE=CIRCUIT-normal circuits or boards with cable interface / CHANGE,TYPE=CIRCUIT-normal circuits or boards with cable interface)
numeric, 11-90 (ADD,TYPE=FRONT-front reference / CHANGE,TYPE=FRONT-front reference)
READYASY ready but asynchronous
Type of Input: single value, 3. parameter of a min-1-group (CHANGE,TYPE=CIRCUIT-normal circuits or boards with cable interface)
single value, optional (ADD,TYPE=CIRCUIT-normal circuits or boards with cable interface)
Possible Values: N no
Y yes
SRCGRP source group number
Type of Input: single value, optional
Possible Values: numeric, 1-255
TYPE entry type of reference clock
Type of Input: single value, mandatory (ADD / CHANGE / DELETE)
single value, optional (DISPLAY / REGENERATE)
Possible Values: AECB external clock box
CIRCUIT normal circuits or boards with cable interface
FRONT front reference
SRCGRP source group (DISPLAY)

Error Messages

F01
F01: CIRCUIT DOES NOT EXIST IN THE REFERENCE CLOCK TABLE
F02
F02: PEN ERROR; SLOT FORMALLY INCORRECT
F03
F03: PEN ERROR; PERMISSIBLE RANGE FOR CIRCUIT NO.: 0 - @@
F04
F04: TMX21 MODULE; PERMISSIBLE RANGE FOR CIRCUIT NO.: 0 - @@
F05
F05: DIUC64 MODULE; PERMISSIBLE VALUES FOR CIRCUIT NO.: 0 OR 32
F05
F05: DIUC MODULE; PERMISSIBLE VALUE FOR CIRCUIT NO.: 0
F06
F06: DIUS2 MODULE; PERMISSIBLE RANGE FOR CIRCUIT NO.: 0 - @@
F07
F07: CDG MODULE; PERMISSIBLE RANGE FOR CIRCUIT NO.: 0 - @@
F08
F08: PNEDIUS2 MODULE; PERMISSIBLE RANGE FOR CIRCUIT NO.: 0 - @@
F11
F11: LTG @@ NOT ASSIGNED
F12
F12: LTG @@: LTU @@ NOT ASSIGNED
F13
F13: PEN ERROR; PERMISSIBLE RANGE FOR LTG: 1 - @@
F14
F14: PEN ERROR; PERMISSIBLE RANGE FOR LTU: 1 - 15, 17-99
F15
F15: REFERENCE CLOCK CIRCUIT IS REFERENCE CLOCK SUPPLIER; BLOCK FIRST
     (AMO REFTA)
F16
F16: REFERENCE CLOCK TABLE IS FULL. INSUFFICIENT MEMORY SPACE (AMO DIMSU:
PARAMETER TRK)
F17
F17: PEN NOT SPECIFIED AT THE PHYSICAL MODULE LOCATION,
     POSSIBLE INPUT: @@-@@-@@@-@@
F18
F18: INSUFFICIENT MEMORY SPACE (AMO DIMSU: PARAMETER TRK)
F19
F19: THE CIRCUIT MUST BE DEACTIVATED (AMO DSSU)
F20
F20: NO MODULE CONFIGURED AT SPECIFIED PEN
F21
F21: MODULE TYPE IS NOT PROVIDED FOR REFERENCE CLOCK CIRCUITS
F22
F22: REFERENCE CLOCK CIRCUIT ALREADY EXISTS IN REFERENCE CLOCK TABLE
F23
F23: CIRCUIT IS REFERENCE CLOCK SUPPLIER, CHANGE OF PRIORITY NOT ALLOWED
F24
F24: DELETE NOT POSSIBLE; DELETE FIRST THE CIRCUIT WITH THE CONFIGURATION
     AMO (TDCSU, TSCSU)
F25
F25: INSUFFICIENT MEMORY SPACE (AMO DIMSU: PARAMETER LODEN)
F26
F26: PRI MUST BE EQUAL 0 IF PARAMETER SMD = Y FOR THE TRUNK
     (S0 TRUNK -> AMO TDCSU: SMD = Y, S2 TRUNK -> AMO LWPAR: SMD = Y)
F27
F27: THE TRUNK IS CAMP-ON BLOCKED. REPEAT COMMAND LATER OR
     DEACTIVATE IMMEDIATELY (AMO DSSU)
F28
F28: DELETE NOT POSSIBLE SINCE THERE IS AT LEAST 1 CIRCUIT CONFIGURED
     ON THE DIUC MODULE.
     INTERROGATE AND DELETE CIRCUIT(S) WITH AMO TACSU
F29
F29: DELETE NOT POSSIBLE SINCE THERE IS AT LEAST 1 CIRCUIT CONFIGURED
     ON THE PCM HIGHWAY 2 OF THE DIUC64 MODULE.
     INTERROGATE AND DELETE CIRCUIT(S) WITH AMO TACSU
F29
F29: DELETE NOT POSSIBLE SINCE THERE IS AT LEAST 1 CIRCUIT CONFIGURED
     ON THE PCM HIGHWAY 1 OF THE DIUC64 MODULE.
     INTERROGATE AND DELETE CIRCUIT(S) WITH AMO TACSU
F30
F30: LTUC CIRCUITS WHICH ARE USED AS REFERENCE CLOCK CIRCUITS OF
     AN RMS CAN ONLY BE CHANGED WITH AMO REFTA.
     AMO REFTA CANNOT DELETE OR CREATE THEM.
F31
F31: BOARDS LOCATED ON AN RMS CANNOT BE ENTERED IN THE REFERENCE CLOCK TABLE
F32
F32: SLMN/DIU-N2/DIU-N4 MODULE; PERMISSIBLE RANGE FOR CIRCUIT NO.: 0 - @@
F33
F33: DIUS7 MODULE; PERMISSIBLE RANGE FOR CIRCUIT NO.: 0 - @@
F34
F34: STMA MODULE; PERMISSIBLE RANGE FOR CIRCUIT NO.: 0 - @@
F35
F35: STMA CIRCUITS CAN ONLY BE CHANGED WITH AMO REFTA.
     AMO REFTA CANNOT ADD OR DELETE THEM. (AMO BCSU)
F36
F36: AECB; PERMISSIBLE VALUES FOR CLASS: 38, 68 AND 78
F37
F37: FRONT REFERENCE EXISTS ALREADY IN THE REFERENCE CLOCK TABLE
F38
F38: EXTERNAL CLOCK BOX EXISTS ALREADY IN THE REFERENCE CLOCK TABLE
F39
F39: EXTERNAL CLOCK BOX NOT CONFIGURED
F40
F40: FRONT REFERENCE NOT CONFIGURED
F41
F41: FRONT REFERENCE IS REFERENCE CLOCK SUPPLIER; BLOCK FIRST
F42
F42: The LTU of the given PEN has the type FLEX.
     No ADD-REFTA is possible for such LTUs.
F43
F43: LTU @@ HAS NOT BEEN CONFIGURED
F44
F44: NO MODULE CONFIGURED AT PEN @@-@@-@@@-@@.
F45
F45: The LTU @@ of the given AP-shelf is not of the type NCUI4 or Softgate.
F46
F46: AP REFERENCE IS REFERENCE CLOCK SUPPLIER; BLOCK FIRST
F47
F47: IT IS NOT ALLOWED TO CONFIGURE REFTA ENTRIES FOR SUBSCRIBER CIRCUITS.
F48
F48: IF SMD=Y AND MASTER=Y ARE USED THE PRIORITY MUST BE 0.
F49
F49: NOT COMPLETED. ONLY 176 CIRCUITS WITH PRI>0 ARE ALLOWED.

Advisory Messages

H01
H01: REFERENCE CLOCK SUPPLIER IS THE LAST POSSIBLE ONE
     IN THE REFERENCE CLOCK TABLE
     DELETE = Y OR N ?
H02
H02: NO REFERENCE CLOCK CIRCUIT PRESENT AT SPECIFIED PEN IN THE
     REFERENCE CLOCK TABLE
H03
H03: REFERENCE CLOCK SUPPLIER IS THE LAST POSSIBLE ONE
     IN THE REFERENCE CLOCK TABLE
     CHANGE = Y OR N ?
H05
H05: NO REFERENCE CLOCK SUPPLIER PRESENT AT SPECIFIED PEN IN THE
     REFERENCE CLOCK TABLE
H06
H06: CAUTION! THERE IS DANGER OF A CLOCK LOOP BEING FORMED. THE
     PARAMETER SETTING FOR THE PARTNER CIRCUIT MUST BE PRI=0 OR
     PRI/=0 AND BLOCK=Y.
H07
H07: CIRCUIT  @@-@@-@@@-@@ IS STILL UNCONNECTED.          
     FOR THE USAGE AS A REFERENCE CLOCK DELIVERER;                    
     THE CIRCUIT HAS TO BE CONFIGURED FIRST.