Charles | 3641-80 | Release 4 - Charles Industries, Ltd.

360-80 T1 Channel Bank RELEASE NOTES
Covers the Charles Industries Ltd. 360-80 system T1 modules except for the 3641-80 and 3648-80 Routers
System CD Features:
Revisions and Manuals
Module Installation document/manuals
Module Practice documentation/manuals
T1 Controller User’s guide documentation/manuals
This release note - replaces Trouble Shooting Manual
Current Version of T1 Controller (91-360381-X) Software Release:
V3.8/V10
Features in latest Software Releases:
NMS version 4.1: The Network Management System (NMS) software – GUI software used to manage
360-80 channel banks – will operate on 64-bit Windows-based operating systems. NMS version 4.1 is also
compatible with 32-bit Windows-based operating systems.
Previously, the signal-to-noise ratio (SNR) on the 11th circuit of a 12-channel E&M card would worsen
(decrease) when the 12th circuit was not mapped to any T1 timeslots. When the 12th circuit was mapped
to a T1 timeslot, the SNR on the 11th circuit improves. This has been fixed with an update to the FPGA on
the E&M card.
Using the craft/serial interface, usernames up to 10 characters long can be created and deleted. Previously
usernames that were 10 characters long could be created, but could not be deleted. When deleting a
username, only 9 characters were allowed.
T1 Controller software update can be done by following the update procedure under the router section of
this CD.
Operational Notes for the 360-80 System:
1. T1 Controller (3603) - T1 loopbacks 
In ESF (when selecting “payload” for type, the system automatically changes the location to
"far", it then won't allow you to change it to "near" even if you select “line” for type. The
work around is to exit the T1 loopback menu and then re-enter it and the option of “near” for
type “line” is available.)

In SF (The far end line loopback will work the first time. But if you choose “payload” the 2 nd
time, it will revert back to “line” and still show “far” for location, however the loopback will
always occur at the near end. The work around is to manually re-choose the “far” option again
even though it already still displays “far” or exit the T1 loopback menu and re-enter it.)
2. T1 Controller (3603) / Secondary T1 (3608) - Cabling - The RJ-45 cable that goes from the T1
primary (RT1) to the secondary unit RJ-45 (P2) needs to be a crossover cable for bypass function
to work properly. Meaning pin 1 to 5, 2 to 4, 4 to 2, and 5 to 1. It is possible to set up a D/I
application with no alarms but have alarms when the system goes into bypass. Without the
RN-360381-2-revA
2013 Charles Industries, Ltd.
All rights reserved. Printed in United States of America.
The availability of features and technical specifications herein subject to change without notice.
RN-360381-2 rev A
February, 2013
Page 1 of 4
360-80 T1 Channel Bank RELEASE NOTES
Cross-Over Cable the Symptoms are: If the system is working correctly in all directions with
ESF framing, then force a bypass on the secondary. The bypass LED comes on and then the AR
and AY alarms come on which is OK, but then the AR and AY LEDs also come on at both the
east and west channel banks. Swapping the transmit and receive pairs on the T1 cable at the east
bank (XMT to RCV and RCV to XMT), then the system is in sync between east and west banks.
Removing the forced bypass, the D&RI system has alarms because of the swapped pairs on the
east T1 cable.
3. Secondary T1 (3608) - Timing - When configured in a drop and reinsert configuration, D&RI
shelf must be set for loop time. If the D&RI shelf is set for internal timing (it’s default setting),
then the signaling gets corrupted going to/from west to east (no drop at D&RI) due to timing slips
and causes flicker of the LEDs and broken audio on the voice cards in all directions.
4. T1 Controller (3603) / Voice Units 
Half size E&M, FXO & FXS - The tone test (beep) isn't available on the SNMP interface.

Full size E&M, FXO & FXS - Enabling the tone test for 1 channel will block test availability
to all other channels
5. T1 Controller (3603) / 64xN (3634) - Loopbacks - When doing a remote loopback using SNMP
for provisioning, the local 64xN card must have the PRTS option enabled to send the remote
loopback and PRTS option must be enabled at the remote unit to respond to the loopback.
6. T1 Controller (3603) / 64xN (3634) - Loopbacks - With the V.54 loopbacks enabled, using the
local loopback on circuit 4 on the full size cards (channel 4 in lower slot and channel 16 in upper
slot) may cause the remote 64xN card to activate its network loopback. The only way to release
this loopback is locally at the remote location using the craft port or remotely using GUI
management.
7. 64xN (3634) - Timing - When running the 64xN (3634) over multiple timeslots, it is advisable to
set the ext. timing option to “on”. Otherwise the DTE equipment may have sync problems. This
problem showed up when using a Cisco1600 router with V.35 but it works normally when using
DTE test sets.
8. T1 Controller (3603) / DSU (3633) /OCU (3632) - Loopbacks - Loopbacks are not available when
using error correction at 56/64K.
9. DSU (3633) - RS-232 interface - When provisioned for the interface type “RS-232”, the channel
can not be set for a rate higher than 19.2 Kbps per the RS-232 specification.
10. T1 Controller (3603) / DSU (3633) /OCU (3632) - Loopbacks - The DSU and OCU can only
generate loopbacks toward the primary T1 when a 2nd T1 is in the shelf in drop and reinsert
(normal) mode. An attempt to send a loopback toward the secondary T1 will go out the primary
T1 and can overwrite the data that is in that same timeslot on the primary T1.
11. Sec. T1 Controller (3608) / DSU (3633) - Protect Mode - Diagnostics, such as loopbacks, will not
work when the Secondary T1 unit is optioned for ‘protect’ mode.
12. T1 Controller (3603) / OCU (3632) - When the OCU units are set for 64K (default) and the 4W
interface is left open (no sealing current), the unit sends all zeros to the T1 network. If AMI is
selected then this may cause framing errors due to excessive zeros. Correct this by setting un-used
channels of the OCU-DP to any other rate (like 56Kbps) which will provide a logic ‘1’ for each
channel or turn on zero code suppression on the OCU channel
13. OCU (3632) - The sw56 option is non-operational.
RN-360381-2-revA
2013 Charles Industries, Ltd.
All rights reserved. Printed in United States of America.
The availability of features and technical specifications herein subject to change without notice.
RN-360381-2 rev A
February, 2013
Page 2 of 4
360-80 T1 Channel Bank RELEASE NOTES
14. OCU (3632) - SNMP and GUI do not indicate an SNMP initiated loopback on even number
circuits even though the LED turns on and you hear the relay change state.
15. ISDN (3638) - Loopbacks - A LULT loopback may cause both channel LEDs to turn on at the
remote ISDN card.
16. T1 Controller (3603) - Provisioning History - The T1 Controller unit has a history buffer. If
multiple different card types are plugged into the IAD, this buffer may overload. When this
happens, bit errors occur or some channels may be corrupted. If these conditions are experienced,
perform a reset to stored values. If this does not resolve the conditions, perform a reset factory
default on the system. This should be done as a last resort since it will take down all customers,
channel settings and time slot allocation will be cleared to default.
17. T1 Controller (3603) - GUI - Typically it takes less than a minute for the GUI to recognize (green
check mark) a local T1 Controller unit when it's IP address matches one that has been put in the
GUI database. However, if the T1 Controller unit is removed and replaced with a unit that has the
same IP address, subnet mask and gateway address, it may take up to 9 minutes for the GUI to
recognize it. This is because the units have different Mac Addresses. The one way to shorten this
time span to less than a minutes is to reset the GUI PC. It is also possible to delete the entry in the
arp table using the command ‘arp -d <ip_address>’. It isn't an issue for recognition of far end units
thru the ESF datalink.
18. T1 Controller (3603) - GUI - The database must have at least two units entered in it to see the red
‘X’ and green check ‘’marks.
19. Secondary T1 (3608) - The practice states that a factory default with no channel units plugged in
will automatically assign timeslots to a phantom circuit. When this happens, it blocks data from
the east to west but not from west to east because the default sets the timeslot mode to broadcast.
Thus, the phantom is dropped to the primary but is then broadcast to the east.
20. DSU (3633) - Loopbacks - About half the time network initiated alternating DSU loopbacks will
fail when using a HP37702A test set if a latching DSU loopback was sent previously. This
problem is with the test set, not the DSU unit. This function works when checked with a TPI, and
two different T-Berd test sets.
21. DSU (3633) - Craft Terminal - When in the DSU loopback menu, if a loopback (ocu, dsu, csu)
isn’t chosen and apply settings is selected, it may cause continuous scrolling of the prompt.
22. DSU (3633) - (half size unit) to the HP 3779 - When using channels 29-30, the DTE gets errors
when configured for RS232. Channels 25-28 are OK. If channels 29-30 are set to RS530, then it’s
OK.
23. 64xN (3634) - V.54 Loopback - There is a problem with HP37702A test set when sending the
64xN unit a V.54 network loopback code. If the HP is configured for T1-DDS mode (56K) and a
V.54 loopback code is sent to the 64xN unit, then the card will go into loopback correctly. If the
HP is set for 56/64xN mode, then the 64xN unit will not respond to the V.54 loopback code
regardless of the timeslot length. Using the T-Berd test sets and running in the 56/64xN mode, the
64xN unit will always respond to V.54 loopbacks regardless of timeslot length. This is true for
both ½ and full size units.
24. 64xN (3634) - Timeslot - The 64xN indicates broken timeslots when used in multi-timeslot mode
due to the T1 card buffer overloading. A reset to stored values should fix the problem.
RN-360381-2-revA
2013 Charles Industries, Ltd.
All rights reserved. Printed in United States of America.
The availability of features and technical specifications herein subject to change without notice.
RN-360381-2 rev A
February, 2013
Page 3 of 4
360-80 T1 Channel Bank RELEASE NOTES
25. 64xN (3634) - Loopback Compatibility - The 360-80 64xN units can not do a remote loopback to
a Charles 360 64xN channel unit, since the 360-80 unit only does V.54 loopbacks which are not
recognized by the 360 unit.
26. 64xN (3634) - Craft - When enabling the loopbacks the loopback active indication (LPBK shown
below the channel number) does not appear immediately after activating the loopback. Exiting the
provisioning screen and re-entering the screen will show the loopback is active.
27. The HDSL Adapter module (81-002219-Aof 97-001787-A kit) designed for the 360-80 Issue two
shelf can be used with the H2TU-C-202 module made by ADC. However the bipolar T1 signal to
the 3603-81 module needs to be connected to the HDSL modular jack and the external HDSL2
signal connects to pins 1and 2 of the T1 modular jack of the adapter module.
RN-360381-2-revA
2013 Charles Industries, Ltd.
All rights reserved. Printed in United States of America.
The availability of features and technical specifications herein subject to change without notice.
RN-360381-2 rev A
February, 2013
Page 4 of 4
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