Changing the Attributes of a Channelized T1 Port

This procedure is used to change the attributes of a channelized T1 port using the chg-t1 command. A channelized T1 port is a T1 port whose LINKCLASS value is CHAN, 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 an unchannelized T1 port - Changing the Attributes of an Unchannelized 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 a channelized T1 port, these parameters are used with the chg-t1 command.

:loc – The location of the T1 card (card type limt1) that contains the T1 port that is being changed. The location of a channel card (card type limch) cannot be specified for this parameter. The T1 card can be either an E1/T1 MIM, 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), slave (line), or recovered.

The recovered timing source can be used only with the chanbrdg=on parameter and uses the even numbered member of the bridged-pair as a clock source, ensuring that port in the pair can recover the timing from its partner.

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 or esf.

: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.

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  ------    CHAN    ----
1203  2     B8ZS    LINE      SF       133  ------    CHAN    ----
1211  2     B8ZS    LINE      SF       133  ------    CHAN    ----
```
A channelized T1 port is a T1 port whose LINKCLASS value is CHAN.

If there are no channelized T1 ports shown in the rtrv-t1 output, this procedure cannot be performed.

If there are channelized T1 ports shown in the rtrv-t1 output, continue the procedure with 2.

Note:
At least one of the optional parameters encode, t1tsel, framing, or ll must be specified. If none of these parameters are specified with the chg-t1 command, this procedure cannot be performed.

Display the timeslots that are serviced by the T1 card containing the T1 port that is being changed using the rtrv-t1 command specifying the card location and the t1port value from 1.

For this example, enter this command.

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     B8ZS    EXTERNAL  SF       133  ------    CHAN    ----

TS1  1201,A     TS9  -------    TS17 -------
TS2  -------    TS10 -------    TS18 -------
TS3  -------    TS11 -------    TS19 -------
TS4  -------    TS12 -------    TS20 -------
TS5  1202,A     TS13 -------    TS21 -------
TS6  -------    TS14 -------    TS22 -------
TS7  -------    TS15 -------    TS23 -------
TS8  -------    TS16 -------    TS24 -------

Display the signaling links that are assigned to the T1 card by entering the rtrv-slk command with the card location specified in 2. For this example, enter this command.

rtrv-slk:loc=1201

rlghncxa03w 09-05-19 21:17:04 GMT EAGLE5 41.0.0
                                   L2T               PCR  PCR   T1   T1
LOC  LINK LSN         SLC TYPE     SET  BPS    ECM   N1   N2    LOC  PORT TS
1201 A    lsn1         13 LIMT1    1    56000  BASIC ---  ----- 1201 2    10
1201 B    lsn1         12 LIMT1    1    56000  BASIC ---  ----- 1201 1    9

Check the status of the signaling links shown in 3 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
```
rept-stat-slk:loc=1201:link=b
```
rlghncxa03w 09-05-23 13:06:25 GMT EAGLE5 41.0.0
SLK     LSN       CLLI        PST          SST       AST
1201,B  lsn1      ----------- IS-NR        Avail     ----
  ALARM STATUS       = No Alarms
  UNAVAIL REASON     = --
  T1 status          = 1201, RCVRY-T1F:FAC-T1 Port 1 available
```
If all the signaling links shown in this step are out of service, continue the procedure by performing one of these steps.
- If the T1 port is channel bridged (the entry MASTER is shown in the CHANBRDG column for the odd numbered T1 port in the rtrv-t1 output), or if T1 ports 3 through 8 are assigned to the T1 card, the card is either an HC MIM or an E5-E1T1 card. Continue the procedure with 7.
- If the T1 port is not channel bridged, or if T1 ports 3 through 8 are not assigned to the T1 card, continue the procedure with 6 to verify the type of T1 card that the T1 port is assigned to.
If any of the signaling links shown in this step are in service, continue the procedure with 5.
Deactivate the signaling links shown in 4 using the dact-slk command.
For this example, enter these commands.

dact-slk:loc=1201:link=a

dact-slk:loc=1201:link=b

When each of these commands have successfully completed, this message should appear.
```
rlghncxa03w 09-05-07 08:41:12 GMT  EAGLE5 41.0.0
Deactivate Link message sent to card
```
After the signaling links have been deactivated, continue the procedure by performing one of these steps.
- If the T1 port is channel bridged (the entry MASTER is shown in the CHANBRDG column for the odd numbered T1 port in the rtrv-t1 output), or if T1 ports 3 through 8 are assigned to the T1 card, the card is either an HC-MIM or an E5-E1T1 card. Continue the procedure with 7.
- If the T1 port is not channel bridged, or if T1 ports 3 through 8 are not assigned to the T1 card, continue the procedure with 6 to verify the type of T1 card that the T1 port is assigned to.

Display the LIMT1 cards in the database by entering this command.

rtrv-stp:type=limt1

rlghncxa03w 09-05-30 11:07:17 EST  EAGLE 41.0.0

Card  Part Number  Rev  Serial Number  Type     DB    APPL         GPL Version
----  -----------  ---  -------------  ----     --    ----         -----------

1201  870-2671-02  C    10145689323    LIMT1    512M  SS7ANSI      126-034-000
1203  870-1873-01  C    10345690569    LIMT1    512M  SS7ANSI      126-034-000
1211  870-1873-01  C    10346790570    LIMT1    512M  SS7ANSI      126-034-000

Command Completed.

The part numbers and the card types of the T1 cards are shown in Table B-4.

Change the T1 port using the chg-t1 command and the parameter combinations shown in Table B-13, based on the type of T1 card being used.

Table B-13 T1 Interface Parameter Combinations

E1/T1MIM	Non-Channel Bridged T1 Ports - HC-MIM or E5-E1T1 Card	Channel Bridged T1 Ports - HC-MIM or E5-E1T1 Card
Mandatory Parameters
:loc=location of the T1 card	:loc=location of the T1 card	:loc=location of the T1 card
:t1port=T1 port being changed, either 1 or 2	:t1port=T1 port being changed, either 1, 2, 3, 4, 5, 6, 7, or 8	:t1port=T1 port being changed, either 1, 3, 5, or 7
Optional Parameters
:encode=ami, b8zs	:encode=ami, b8zs	:encode=ami, b8zs
:t1tsel=line, external	:t1tsel=line, external	:t1tsel=external, recovered
:framing=sf, esf	:framing=sf, esf	:framing=sf, esf
:ll=0 - 655	:ll=0 - 655	:ll=0 - 655

For this example, enter this command.

chg-t1:loc=1201:t1port=2:encode=ami:encode=line:framing=esf:ll=200

Verify the changes using the rtrv-t1 command specifying the card location and the t1port value specified in 7.

For this example, enter these commands.

rtrv-t1:loc=1201:t1port=2

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      T1                                              LINK    MINS
LOC   PORT  ENCODE  T1TSEL    FRAMING  LL   CHANBRDG  CLASS   RATE
1201  2     AMI     LINE      ESF      200  ------    CHAN    ----

TS1  1201,A     TS9  -------    TS17 -------
TS2  -------    TS10 -------    TS18 -------
TS3  -------    TS11 -------    TS19 -------
TS4  -------    TS12 -------    TS20 -------
TS5  1202,A     TS13 -------    TS21 -------
TS6  -------    TS14 -------    TS22 -------
TS7  -------    TS15 -------    TS23 -------
TS8  -------    TS16 -------    TS24 -------

If the signaling links were not deactivated in 5, continue the procedure with 10.

If the signaling links were deactivated in 5, continue the procedure with 9.

Activate the signaling links that were deactivated in 5 using the act-slk command.
For this example, enter these commands.

act-slk:loc=1201:link=a

act-slk:loc=1201:link=b

When each of these commands have successfully completed, this message should appear.
```
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-10 Changing the Attributes of a Channelized T1 Port

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