Operation
3-13
3510-A2-GN32-70
July 1999
Table 3-5
Local Loopback – DTE Test Message Procedure
Your Action
DSU Front Panel Response
1.
Press the LL test switch.
LL indicator lights, TEST indicator flashes. After
about 6 seconds, TEST indicator remains ON.
2.
Operate your DTE to send test message.
TXD and RXD indicators show interface lead status
while test message is transmitted.
3.
Press the LL test switch.
LL indicator goes Off. TEST flashes for about
6 seconds, then goes Off.
Table 3-6
Local Loopback – DTE Test Message Alternative Procedure
Your Action
DSU Front Panel Response
1.
DTE turns on Pin 18 of the EIA interface or
Pin LL of the V.35 interface
*
which causes the
DSU to perform a Local Loopback.
**
LL indicator lights, TEST indicator flashes. After
about 6 seconds, TEST indicator remains ON.
2.
DTE sends test message.
TXD and RXD indicators show interface lead status
while test message is transmitted.
**
3.
DTE turns off Pin 18 or Pin LL to restore DSU to
normal.
LL indicator goes Off. TEST flashes for about
6 seconds, then goes Off.
*
Pin 18 of the EIA interface or Pin LL of the V.35 interface will not function unless straps S3-3 and S3-4 are
enabled.
**
DSR EIA output and the indicator goes Off during LL unless strap S5-5 (DSR always ON) is enabled.
Содержание Comsphere 3510
Страница 4: ...COMSPHERE 3500 Series Data Service Units C July 1999 3510 A2 GN32 70 Notices ...
Страница 6: ...COMSPHERE 3500 Series Data Service Units E July 1999 3510 A2 GN32 70 ...
Страница 12: ...COMSPHERE 3500 Series Data Service Units vi July 1999 3510 A2 GN32 70 ...
Страница 37: ...Operation 3 15 3510 A2 GN32 70 July 1999 Figure 3 8 Out of Service Condition Troubleshooting Flowchart ...
Страница 39: ...Operation 3 17 3510 A2 GN32 70 July 1999 Figure 3 10 Streaming Terminal Condition Troubleshooting Flowchart ...
Страница 54: ...COMSPHERE 3500 Series Data Service Units 4 14 July 1999 3510 A2 GN32 70 Figure 4 8 DSU Strap Default Settings ...
Страница 72: ...COMSPHERE 3500 Series Data Service Units A 6 July 1999 3510 A2 GN32 70 ...
Страница 74: ...COMSPHERE 3500 Series Data Service Units B 2 July 1999 3510 A2 GN32 70 Figure B 1 DSU Timing Chart 1 of 2 ...
Страница 75: ...Timing During Testing B 3 3510 A2 GN32 70 July 1999 Figure B 1 DSU Timing Chart 2 of 2 ...
Страница 76: ...COMSPHERE 3500 Series Data Service Units B 4 July 1999 3510 A2 GN32 70 ...