Changing the Attributes of an Unchannelized T1 Port

This procedure is used to change the attributes of an unchannelized T1 port using the chg-t1 command. An unchannelized T1 port is an T1 port whose LINKCLASS value is UNCHAN, shown in the LINKCLASS column in the rtrv-t1 output. Other actions can be performed on T1 ports. To perform these actions on the T1 ports, perform one of these procedures.

To change the attributes of a channelized T1 port - Changing the Attributes of a Channelized T1 Port
To make a channel bridged T1 port from a channelized T1 port - Making a Channel Bridged T1 Port from a Channelized T1 Port
To make a non-channel bridged T1 port from a channel bridged T1 port - Making a Non-Channel Bridged T1 Port from a Channel Bridged T1 Port

To change the attributes of an unchannelized T1 port, these parameters are used with the chg-t1 command.

:loc – The location of the T1 card (card type limt1) that is servicing the T1 signaling link. The location of a channel card (card type limch) cannot be specified for this parameter. The T1 card can be either an HC-MIM or an E5-E1T1 card.

:t1port – The T1 port being changed in this procedure.

:encode – Specifies the type of encoding or decoding that is used on the T1 signaling link, either B8ZS or AMI.

:t1tsel – The timing source for the T1 signaling link, master (external) or slave (line).

Note:

To use an external high-speed master clock source other than RS-422, TDMs 870-0774-15 or later must be installed in card locations 1114 and 1116, and the TDM Global Timing Interface options must be configured. For more information, see Configuring the Options for the TDM Global Timing Interface.

:framing – Specifies the framing format to be used on the T1 signaling link, either sf, esf, or esfperf.

:ll – The length of the cable, in feet, used for the T1 signaling link. The value of the ll parameter is from 0 to 655.

:minsurate – Specifies the minimum number of signaling units (FISUs and LSSUs) per second that are transmitted on the outbound T1 signaling link during idle periods or when there is an unused portion of the link’s bandwidth. The value of this parameter is from 400 to 1600 signaling units per second, with the default value of 1000 signaling units per second. The minsurate parameter can be specified only for un unchannelized T1 port (linkclass=unchan parameter).

The T1 card specified in this procedure must be in the database. This can be verified with the rtrv-t1 command.

If either the encode, t1tsel, framing, or ll values are being changed, all the signaling links serviced by the T1 card must be taken out of service.

Display the existing T1 interfaces in the database using the rtrv-t1 command with no parameters.
```
rlghncxa03w 09-05-19 21:17:04 GMT EAGLE5 41.0.0

      T1                                              LINK    MINS
LOC   PORT  ENCODE  T1TSEL    FRAMING  LL   CHANBRDG  CLASS   RATE
1201  2     B8ZS    EXTERNAL  SF       133  ------    UNCHAN  1200
1203  2     B8ZS    LINE      SF       133  ------    CHAN    ----
1211  2     B8ZS    LINE      SF       133  ------    CHAN    ----
```
An unchannelized T1 port is an T1 port whose LINKCLASS value is UNCHAN.

If there are no unchannelized T1 ports shown in the rtrv-t1 output, this procedure cannot be performed.
If there are unchannelized T1 ports shown in the rtrv-t1 output, continue the procedure by performing one of these steps.
- If the encode, t1tsel, framing, or ll parameters are being changed in this procedure, continue the procedure with 2.
- If the encode, t1tsel, framing, or ll parameters are not being changed in this procedure, continue the procedure with 5.

Display the signaling links that are assigned to the T1 card by entering the rtrv-slk command with the card location shown in 1. For this example, enter this command.

rtrv-slk:loc=1201

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                                   L2T               PCR  PCR   E1   E1
LOC  LINK LSN         SLC TYPE     SET  BPS    ECM   N1   N2    LOC  PORT TS
1201 A    lsn1         13 LIMT1    1    56000  BASIC ---  ----- 1201 2    10

Check the status of the signaling links shown in 2 using the rept-stat-slk command with the card location and signaling link.
For this example, enter these commands.

rept-stat-slk:loc=1201:link=a
```
rlghncxa03w 09-05-23 13:06:25 GMT EAGLE5 41.0.0
SLK     LSN       CLLI        PST          SST       AST
1201,A  lsn1      ----------- IS-NR        Avail     ----
  ALARM STATUS       = No Alarms
  UNAVAIL REASON     = --
  T1 status          = 1201, RCVRY-T1F:FAC-T1 Port 2 available
```
If all the signaling links shown in this step are out of service, continue the procedure with 5.

If any of the signaling links shown in this step are in service, continue the procedure with 4.
Deactivate the signaling links shown in 3 using the dact-slk command.
For this example, enter these commands.

dact-slk:loc=1201:link=a

When this command has successfully completed, this message should appear.
```
rlghncxa03w 09-05-07 08:41:12 GMT  EAGLE5 41.0.0
Deactivate Link message sent to card
```

Change the T1 port using the chg-t1 command and the parameter combinations shown in Table B-14.

Table B-14 Unchannelized T1 Port Parameter Combinations

Mandatory Parameters

:loc=location of the T1 card

:t1port=T1 port being changed, either 1, 2, 3, 4, 5, 6, 7, or 8

Optional Parameters

:encode=ami, b8zs

:t1tsel=line, external

:framing=sf, esf, esfperf

:ll=0 - 655

:minsurate=400 - 1600

For this example, enter this command.

rlghncxa03w 09-05-19 21:17:04 GMT EAGLE5 41.0.0

      T1                                              LINK    MINS
LOC   PORT  ENCODE  T1TSEL    FRAMING  LL   CHANBRDG  CLASS   RATE
1201  2     B8ZS    EXTERNAL  SF       133  ------    UNCHAN  1200
1203  2     B8ZS    LINE      SF       133  ------    CHAN    ----
1211  2     B8ZS    LINE      SF       133  ------    CHAN    ----

chg-t1:loc=1201:t1port=2:encode=ami:t1tsel=line:framing=esfperf:ll=300:minsurate=700

Verify the changes using the rtrv-t1 command specifying the card location and the t1port value specified in 5.
For this example, enter these commands.

rtrv-t1:loc=1201:t1port=2
```
rlghncxa03w 09-05-28 09:12:36 GMT EAGLE5 41.0.0

      T1                                              LINK    MINS
LOC   PORT  ENCODE  T1TSEL    FRAMING  LL   CHANBRDG  CLASS   RATE
1201  2     AMI     LINE      ESF PERF 300  ------    UNCHAN  700
```
If the signaling links were not deactivated in 4, continue the procedure with 8.

If the signaling links were deactivated in 4, continue the procedure with 7.
Activate the signaling links that were deactivated in 4 using the act-slk command.
For this example, enter this command.

act-slk:loc=1201:link=a
```
rlghncxa03w 09-05-07 08:41:12 GMT  EAGLE5 41.0.0
Activate Link message sent to card
```

Back up the new changes using the chg-db:action=backup:dest=fixed command.

These messages should appear, the active Maintenance and Administration Subsystem Processor (MASP) appears first.

BACKUP (FIXED) : MASP A - Backup starts on active MASP.
BACKUP (FIXED) : MASP A - Backup on active MASP to fixed disk complete.
BACKUP (FIXED) : MASP A - Backup starts on standby MASP.
BACKUP (FIXED) : MASP A - Backup on standby MASP to fixed disk complete.

Figure B-11 Changing the Attributes of an Unchannelized T1 Port

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