Enabling an MSDL
LD 96 is used to test and maintain D-Channel links.
From Release 18, D-Channels can also reside on Multi-purpose Serial Data Link (MSDL) cards:
- NT6D80 - (Core/Net) 4 ports for PRI D-Channel (DCH) and Application Module Link (AML). Port 0 can be used for SDI (TTY)
- NTBK51 - 2 port daughterboard, mounted on either the NTAK09 1.5 DTI/PRI card or NTBK50 2 Mb PRI digital trunk card
- NTDW79 - A UDT card has on-board DDCH/DCHI functionality (same as a NTBK51), use LD 96 commands with l s c u
Use LD 96: map dch to find the DCH/MSDL association if performing maintenance.
.map dch DCH 002 : GROUP 00 MSDL 08 PORT 0 4 port MSDL card in Network slot (CS1000M) DCH 003 : GROUP 00 MSDL 08 PORT 1 DCH 024 : GROUP 00 MSDL 08 PORT 2
MSDL commands:
The LD 96 MSDL commands are listed below, x is the MSDL device number (defined
by ADAN: DNUM in LD 17).
These commands are also provided in Input/Output Diagnostic (LD
37) and Link Diagnostic (LD 48).
| Command | Description |
|---|---|
| DIS MSDL x (ALL) | Disable MSDL Device |
| ENL MSDL x (FDL, ALL) | Enable MSDL Device (FDL to 'force download' required loadware) |
| RST MSDL x | Power on Reset MSDL Device (must be in MAN DSBL state) |
| SLFT MSDL x | Power on Reset, and execute a self-test on MSDL device x |
| STAT MSDL (x) (FULL) | Get MSDL Status (use FULL to list all MSDL cards in system) |
Note:
- ALL and FULL applies to 4 port NT6D80 (Core/Net) cards, eg:
DIS MSDL x ALL - The MSDL self-test is not applicable to the NTBK51 D-Channel daughterboard
The LD 96 MSDL D-Channel commands are listed below, x is the DCH number (defined by ADAN: DCH in LD 17).
| Command | Description |
|---|---|
| DIS LLB x | Disable local loop back mode on MSDL DCH x |
| DIS RLB x | Disable remote loop back mode on MSDL DCH x |
| DIS TEST x | Disable TEST mode on MSDL DCH x |
| DLIF DCH xx FDL | Force download a PRI interface table. |
| ENL LLB x | Enable local loop back mode on MSDL DCH x |
| ENL RLB x | Enable remote loop back mode on MSDL DCH x |
| ENL TEST x | Enable TEST mode on MSDL DCH x |
| MAP DCH x | Display physical card and port settings for D-Channels. Eg.:
MAP DCH DCH 15 DCHI 07 DCH 23 MSDL 09 PORT 2 |
| PCON DCH x | Print configuration parameters on MSDL DCH x |
| PMES DCH x | Print incoming layer 3 messages on MSDL DCH x |
| PTRF DCH x | Print traffic report on MSDL DCH x |
| STAT DCH x | Get the present status of D-Channel x |
| TEST LLB x | Start local loop back test on MSDL DCH x |
| TEST RLB x | Start remote loop back test on MSDL DCH x |
The MSDL commands listed in LD48 can also be used in LD96.
Example TTY Output:
Enabling MSDL 6 (if the version numbers are different, an automatic download will commence):
>ld 96 DCH000 .enl msdl 6 6 is the MSDL device number (ADAN: DNUM in LD 17) DOWNLOADING BASE REASON: VERSION MISMATCH OVL021 IDLE SDL100 BUSY OVL021 BKGD SDL100 BUSY ................................................................................... ................................................................................... ................................................................................... ................................................................................... OK .
Enabling a UDT card MSDL, card is in slot 24 0 1:
.enl msdl 24 0 1 UDT card is in slot 24 0 1 OVL021 IDLE ................................................................................... ................................................................................... ................................................................................... ................................................................................... SDL000 NET1 ( MSDL 24 0), VERSION 48, MAINT MODE. .. OK .stat msdl MSDL 024 0 1 ENBL .
To force a firmware download to the MSDL, ie: with new hardware, a configuration change, or when trying to correct D-Channel mismatch problems, always use the 'FDL' switch - and watch the dots (full-stops - there will be several pages of them), which should flow nicely/evenly during the download process:
>ld 96 DCH000 .enl msdl 6 fdl DOWNLOADING BASE REASON: FORCED OVL021 IDLE SDL100 BUSY ................................................................................... ................................................................................... ................................................................................... ................................................................................... SDL000 MSDL 6, VERSION 70, MAINT MODE. DOWNLOADING PRIE REASON: FORCED ................................................................................... ................................................................................... ................................................................................... ................................................................................... SDL000 PRIE (MSDL 6), VERSION 80, MAINT MODE. . DOWNLOADING GER DATA REASON: FORCED .. SDL000 GER1 ( MSDL 6), VERSION 50, MAINT MODE. OK .
If the download dots stop, or the card stops responding, try the RST MSDL x command.
If an OK and/or prompt is not returned, 4 star out of LD 96, and re-enter it to reset the card.
If there's an OVL0306 message, use the SUSP command: LD 96 SUSP, and RST MSDL x. Use SUSP with caution.