Interface Module
UK
User Guide
TIM1500-12
12-Port T1 Inverse Multiplexer
and
TIM1500-24
24-Port T1 Inverse Multiplexer
210-0000053 rev02 TIM1500 User Guide Page 1 of 21
http://www.nettonet.com
contact@nettonet.com
© Copyright 2003 Net to Net Technologies, Inc.
™ The Net to Net Logo is a trademark of Net to Net Technologies, Inc.
Worldwide Headquarters
Net to Net Technologies
112 Corporate Drive
Portsmouth, NH 03801
USA
1 (877) 638-2638
EMEA Headquarters
Net to Net Technologies
Victoria House 19 Park Way
Newbury Berkshire RG14 1EE
44 (0) 1635-570950
Contents
1.0 INSTALLATION
1.1 Unpack and Inspect the TIM1500
1.2 Verify TIM1500 Switch Settings
1.3 Install the TIM1500 in an IP DSLAM Chassis
1.4 Connect the T1 Line(s)
1.5 LED Indications
2.0 T1 PARAMETERS
2.1 Parameter Defaults
2.2 Transmit (Tx) Buildout
2.3 Clock Source
2.4 Frame Type
2.5 Line Code
2.6 Speed
3.0 ADDITIONAL INFORMATION
3.1 Configuration and Management
3.2 Data Storage
3.3 Regulatory Compliance
1.2.1 Switch 2
1.2.2 Switch 3
1.3.1 Align the TIM1500 with the IP DSLAM Slot Module Guides
1.3.2 Slide the TIM1500 Firmly into the Chassis
1.3.3 Verify that the TIM1500 is Receiving Power
1.3.4 Secure the TIM1500 in the IP DSLAM Chassis
1.4.1 Local Connection
1.4.1.1 Select the Appropriate RJ21 Connector(s)
1.4.1.2 Detach the Velcro Strap and Position the T1 Cable RJ21 Connector(s)
1.4.1.3 Secure the Connector(s)
1.4.1.4 RJ21 Port Pinouts
1.4.2 Remote Connection
1.4.2.1 Loop Bonded Connection
1.4.2.2 Single Line T1 Connection
1.4.3 Verify the Connection
2.2.1 0 dB (default)
2.2.2 -7.5 dB, -15 dB, -22.5 dB
2.3.1 Local (default-provider mode)
2.3.2 Loop (default-subscriber mode)
2.4.1 Extended Super Frame (default)
2.4.2 Super Frame
2.5.1 Bipolar with 8 Zero Substitution (default)
2.5.2 Alternate Mark Inversion
210-0000053 rev02 TIM1500 User Guide Page 2 of 21
CAUTION
Net to Net Technologies strongly recommends the use of proper electrostatic discharge (ESD) precautions when
handling this equipment.
1.0 INSTALLATION
1.1 Unpack and Inspect the TIM1500
If there is visible damage, do not attempt to connect the device; contact Customer Support at 1-877638-2638 (1-603-427-0600 for international customers) or support@nettonet.com.
1.2 Verify TIM1500 Switch Settings
NOTE
TIM1500s with printed circuit boards (PCBs) at rev 810-0000AA have eight switch banks. Section 1.2.1 and
1.2.2 below refer to the switch bank labeled "SW 7"; all switches on the other seven switch banks should be in
the default "up" position. PCBs at any rev other than 810-0000AA have only one switch bank.
1.2.1 Switch 2
1.2.2 Switch 3
Switch 3 indicates to the IP DSLAM's MUM whether the TIM1500 will be acting as a T1
provider or a T1 subscriber. Default, in the UP position, dictates that the TIM1500 will be
acting as a provider. In most cases, this will be the desired setting. The TIM1500 can, however,
be configured to act as a T1 subscriber, if so desired, by placing Switch 3 in the DOWN
position.
The TIM1500 houses a bank of eight [8] switches at the rear of the
module (opposite the faceplate). Switches are numbered from left to
right, 1 - 8. All eight switches should be in the UP (default) position.
Switches 1 and 4-8 are not used.
CAUTION
Switch 2 indicates, to the IP DSLAM's MUM, that the module is a T1
inverse multiplexer and MUST be in the UP position. The TIM1500 will
NOT achieve link if Switch 2 is in the DOWN position.
Provider Mode Subscriber Mode
N
settings will be determined via each port's communication with its respective partner T1 provider.
You will NOT be able to set speed or timing configurations on a TIM1500 in subscriber mode. These
OTE
210-0000053 rev02 TIM1500 User Guide Page 3 of 21
1.3 Install the TIM1500 in an IP DSLAM Chassis
NOTE
There must be a Multiplexer Uplink Module (MUM) with an Uplink Interface Module (UIM) installed in your IP
DSLAM chassis in order for interface modules to operate.
Net to Net Technologies' IP DSLAM interface modules are hot swappable; installing or removing an
interface module while the chassis is powered up does not affect the operational status of other
interface modules within the chassis. The IPD12000 and IPD12000E are fourteen slot chassis; slots
1-12 are reserved for interface modules (such as the TIM1500) and slots 13-14 are reserved for
MUMs. Interface modules may be placed in any order in slots 1-12. The IPD4000 and IPD4000E are
five slot chassis; slots 1-4 are reserved for interface modules and slot 5 is reserved for a MUM.
1.3.1 Align the TIM1500 with the IP DSLAM Slot Module Guides
Slot 1-12 on the IPD12000(E) or slot 1-4 on the IPD4000(E).
210-0000053 rev02 TIM1500 User Guide Page 4 of 21
1.3.2 Slide the TIM1500 Firmly into the Chassis
DO NOT USE EXCESS FORCE.
210-0000053 rev02 TIM1500 User Guide Page 5 of 21
1.3.3 Verify that the TIM1500 is Receiving Power
The PWR (Power) LED on the TIM1500 faceplate will illuminate green.
If your IP DSLAM is not yet powered up,
refer to the IP DSLAM Installation
Instructions for your model at
http://www.nettonet.com/support/docs/#I
.
1.3.4 Secure the TIM1500 in the IP DSLAM Chassis
Tighten the fastening screws on the module faceplate with a Philips or Flathead screwdriver.
210-0000053 rev02 TIM1500 User Guide Page 6 of 21
1.4 Connect the T1 Line(s)
1.4.1 Local Connection
1.4.1.1 Select the Appropriate RJ21 Connector(s)
T1 cables must be connected according to the IP DSLAM slot in which the TIM1500 was
installed. In previous illustrations the TIM1500 was installed in Slot 3, therefore the T1
cable(s) should be plugged into the third RJ21 connector(s) from the right.
1.4.1.1.1 IPD12000E or IPD4000E
Each interface module slot on the IPD12000E and IPD4000E has two [2]
corresponding RJ21 connectors located on the back of the chassis. The bottom
row of RJ21 connectors (A) on the IPD12000E provides the T1 connection for
TIM1500 ports 1-12 and the top row of RJ21 connectors (B) provides the T1
connection for TIM1500 ports 13-24. On the IPD4000E, the A connectors for each
interface module slot are on the left and the B connectors are on the right.
NOTE
The TIM1500-24 utilizes both rows of RJ21 connectors on the IPD12000E and IPD4000E.
The TIM1500-12 utilizes only the A connectors on the IPD12000E (lower row) and
IPD4000E (left-hand side).
210-0000053 rev02 TIM1500 User Guide Page 7 of 21
TIM1500-24
For the
TIM1500-24,
you must
connect a
T1 cable to
both the
A and B
Connectors
in order to
utilize
all 24 T1 ports.
TIM1500-12
For the
TIM1500-12,
connect a T1
cable
to the A
Connector
only; the B
Connector
has no function
for the
TIM1500-12.
IPD12000E IPD12000E
1.4.1.1.2 IPD12000 or IPD4000
Each interface module slot on the IPD12000 and IPD4000 has one corresponding
RJ21 port located on the back of the chassis which will connect TIM1500 T1 ports
1-12.
NOTE
Although the TIM1500-24 can function in an IPD12000 or IPD4000, you will not be able to
utilize ports 13-24; the IPD12000 and IPD4000 do not have the second row of B
connectors necessary to support additional T1 ports.
210-0000053 rev02 TIM1500 User Guide Page 8 of 21
TIM1500-24 and TIM1500-12
There is only one RJ21 port, for each module
slot, to which a T1 connection can be made.
This connection will support T1 ports 1-12
on both the TIM1500-12 and the TIM1500-24;
you will not be able to utilize ports 13-24
on a TIM1500-24 installed in an IPD12000 or
IPD4000.
210-0000053 rev02 TIM1500 User Guide Page 9 of 21
1.4.1.2 Detach the Velcro Strap and Position the T1 Cable RJ21 Connector(s)
1.4.1.2.1 IPD12000 and IPD12000E
Detach the Velcro strap and pull it open to the right, leaving it looped under the
connector frame on the right side. Slide the RJ21 connector of your T1 cable
underneath the Velcro and press it firmly into the RJ21 connector on the chassis.
1.4.1.2.2 IPD4000 and IPD4000E
On the IPD4000 and IPD4000E the RJ21 connectors attach horizontally with the
T1 cable trailing off to the left. Detach the Velcro strap and pull it open and
downward, leaving it looped under the bottom edge of the connector frame. Slide
the RJ21 connector of your T1 cable underneath the Velcro, from the left, and
press it firmly into the RJ21 connector on the chassis.
1.4.1.3 Secure the Connector(s)
1.4.1.3.1 IPD12000 and IPD12000E
Screw the top of the T1 cable connector into the jack screw at the top of the RJ21
connector frame on the chassis. If you are using a 120° or 180° cable, both the
top and the bottom of the cable connector should be secured to the RJ21
connector frame on the chassis.
NOTE
The RJ21 connector cannot be screwed into the connector frame on the IPD12000. A T1
connection on the IPD12000 can only be secured via the Velcro strap.
210-0000053 rev02 TIM1500 User Guide Page 10 of 21
Pull the Velcro strap to the right, making sure that it is snug against the connector,
and then pull the strap back across to the left, sticking it to itself across the top of
the connector. Tuck the tab at the end of the strap down to the left of the
connector frame so it is out of the way of other connections.
1.4.1.3.2 IPD4000 and IPD4000E
Screw the right side of the T1 cable connector into the jack screw at the right side
of the RJ21 connector frame on the chassis. If you are using a 120° or 180°
cable, both the right and left sides of the cable connector should be secured to the
RJ21 connector frame on the chassis.
NOTE
The RJ21 connector cannot be screwed into the connector frame on the IPD4000. A T1
connection on the IPD4000 can only be secured via the Velcro strap.
Pull the Velcro strap downward, making sure that it is snug against the connector,
and then pull the strap up and over the RJ21 connector, sticking it to itself across
the top of the connector. Tuck the tab at the end of the Velcro strap above the
connector frame towards the chassis so it is out of the way of other connections.
210-0000053 rev02 TIM1500 User Guide Page 11 of 21
1.4.1.4 RJ21 Port Pinouts
1.4.1.4.1 RJ21 Pins
TIM1500
RJ21
Port
T1
RJ21
Connector
210-0000053 rev02 TIM1500 User Guide Page 12 of 21
1.4.1.4.2 A Connector Pinout
A CONNECTORS
(IPD12000E bottom row, IPD4000E left side, IPD12000 and IPD4000)
TIM1500 T1 PORTS 1 2 3 4 5 6 7 8 9 10 11 12
Ring 14 15 16 17 18 19 20 21 22 23 24 25
TX
RJ21
PINS
(pins 13 and 38 are not used)
Tip 39 40 41 42 43 44 45 46 47 48 49 50
Ring 1 2 3 4 5 6 7 8 9 10 11 12
RX
Tip 26 27 28 29 30 31 32 33 34 35 36 37
IPD12000E
210-0000053 rev02 TIM1500 User Guide Page 13 of 21
1.4.1.4.3 B Connector Pinout
B CONNECTORS
(IPD12000E top row and IPD4000E right side)
TIM1500 T1 PORTS 13 14 15 16 17 18 19 20 21 22 23 24
Ring 14 15 16 17 18 19 20 21 22 23 24 25
TX
RJ21
PINS
(pins 13 and 38 are not used)
Tip 39 40 41 42 43 44 45 46 47 48 49 50
Ring 1 2 3 4 5 6 7 8 9 10 11 12
RX
Tip 26 27 28 29 30 31 32 33 34 35 36 37
IPD12000E
1.4.2 Remote Connection
The TIM1500 is capable of supporting both single-line connections and multiple-line loop
bonded connections, as well as any combination of the two. If the distance(s) between the
TIM1500 and any of the remote T1 equipment is greater than 6,000 feet, the line(s) may
require a T1 repeater.
210-0000053 rev02 TIM1500 User Guide Page 14 of 21
1.4.2.1 Loop Bonded Connection
Using multiple T1 lines for one network connection (loop bonding) will net speed and
data passing capability equal to the cumulative total of the individual single-line
connections. Multiple T1 lines used for one connection can also be considered backup
for each other should one or more of the lines become disabled. Any of the ports on the
TIM1500-12 or TIM1500-24 can be bonded together; it is not necessary for them to be
consecutive.
AUTION
C
All T1 ports intended for a loop bonded connection MUST be identically configured PRIOR to
connection. See Net to Net's NMS Management User Guide and/or CLI Management User
Guide for configuration instructions. If default settings are to be used for bonded ports, then
prior configuration is not necessary and you may proceed with installation.
The T1 equipment to which a TIM1500 is connected must also be T1 loop bonding
capable in order for the TIM1500 to establish a loop bonded connection. Refer to Net to
Net's T1 Loop Bonding Product to Product Feature Compatibility document at
http://www.nettonet.com/support/docs/230-0000034 .
1.4.2.2 Single Line T1 Connection
A single line connection can be established between the TIM1500 and any of Net to
Net's T1 modems.
1.4.3 Verify the Connection
For each port being connected to a remote T1 modem, verify that the T1 link has been
established.
The T1 LK LED of connected ports will illuminate green
to indicate a connection has been made.
Link up should occur within 20 seconds
depending on the quality, gauge and distance
of the copper cable(s).
210-0000053 rev02 TIM1500 User Guide Page 15 of 21
1.5 LED Indications
LED
PWR (Power) solid green TIM1500 is operational If the Power LED is not illuminated, it is unlikely
State Indication Additional Information
the TIM1500 is receiving power and none of the
LEDs will be illuminated.
LK (Link) pulsing
green
solid green problematic T1 connection A connection exists but there is indication of a
no
illumination
RX (Reception) flashing
amber
solid amber heavy Rx traffic The port is receiving unusually large amounts of
no
illumination
T1 connection is established and
active
Red Alarm
The incoming connection to the
T1 port has been lost; no data is
being received.
T1 activity The port is receiving data from the remote T1
no activity A link may exist but the port is not receiving any
The T1 link is operational and traffic is flowing.
problem with the T1 line.
If the outgoing connection from the T1 port has
also been lost then the remote T1 modem will be
in Red Alarm as well.
modem.
data from the remote T1 modem.
data from the remote T1 modem.
TX
(Transmission)
210-0000053 rev02 TIM1500 User Guide Page 16 of 21
flashing
amber
solid amber heavy Tx traffic The port is transmitting unusually large amounts
no
illumination
T1 activity The port is transmitting data to the remote T1
modem.
of data to the remote T1 modem.
no activity A link may exist but the port is not transmitting
any data to the remote T1 modem.
AL (Alarm) no
illumination
solid amber Yellow Alarm
pulsing
amber
T1 is operational An established T1 link has no alarm indications and
is operational UNLESS the LK LED remains unlit as
well, in which case the T1 port is in Red Alarm.
The remote T1 modem has lost its incoming
An outgoing connection has been
lost; the remote T1 modem is
not receiving any data from the
T1 port.
Blue Alarm
An indirect connection has been
lost; the T1 port may no longer
be receiving data from the
remote T1 modem.
connection and is in Red Alarm.
The remote T1 modem has lost a connection with
an intermediate device and is in Red or Yellow
Alarm.
(A pulsing LED blinks steadily at a rate of once per second. A flashing LED blinks at a more rapid, less constant rate.)
2.0 T1 PARAMETERS
Parameters common to all of Net to Net's interface modules are defined in Net to Net's management user
guides; refer to the NMS Management User Guide ( http://www.nettonet.com/support/docs/210-
0000048 ) and/or the CLI Management User Guide ( http://www.nettonet.com/support/docs/2100000052 ). Parameters specific to the TIM1500 are outlined below.
2.1 Parameter Defaults
No configuration is necessary for the TIM1500 to operate at default settings.
Parameter Default
Transmit (Tx) Buildout 0 decibels (dB)
Clock Source
Flood Uplink
Frame Type Extended Super Frame (ESF)
IP Range 1 0.0.0.0 - 255.255.255.255
IP Range 2 0.0.0.0 - 0.0.0.0
Line Code Bipolar with 8 Zero Substitution (B8ZS)
Priority 0
Protocol ALL
Speed (Single Line) 1,536 kbps
VLAN 0 - 0
VLAN Back-bone 0
Local - provider mode
Loop - subscriber mode
210-0000053 rev02 TIM1500 User Guide Page 17 of 21
2.2 Transmit (Tx) Buildout
Tx Buildout is the attenuation level of the T1 line. The shorter the distance between the TIM1500
and a remote T1 modem, the more line attenuation is required in order to prevent the incoming
amplitude of the T1 signal from becoming too strong for repeaters, switches and other T1
transmission equipment that may be encountered along the line. Increased line attenuation
translates to decreased Tx Buildout on the T1 line.
2.2.1 0 dB (default)
Receivers on most newer T1 transmission equipment can automatically adjust for incoming
amplitude, allowing them to run at zero attenuation regardless of distance.
2.2.2 -7.5 dB, -15 dB, -22.5 dB
Some older T1 transmission equipment cannot automatically adjust for incoming amplitude
and line attenuation must be set accordingly.
2.3 Clock Source
Clock source refers to the timing origination for T1 transmission links.
2.3.1 Local (default-provider mode)
Timing is derived from an oscillator on board the TIM1500.
2.3.2 Loop (default-subscriber mode)
Timing is derives from an intermediate device on the T1 line.
NOTE
Local timing is the default for a TIM1500 in T1 provider mode. Default for a TIM1500 in subscriber mode is Loop
and cannot be modified.
2.4 Frame Type
Frame type is the T1 data encapsulation method. A frame consists of 193 bits (8-bit samples of each
of the 24 T1 data channels plus a synchronization bit) transmitted at a rate of 8,000 frames per
second (1,536 kbps) across the T1 line.
2.4.1 Extended Super Frame (default)
Used in Wide Area Networks (WANs), Extended Super Frame (ESF) assembles data into 24frame transmission clusters and integrates the following:
Facilities Data Link (FDR): in-service monitoring and diagnostics
Cyclic Redundancy Check (CRC): scrutinization of data integrity and detection of
line errors
2.4.2 Super Frame
Super Frame (SF) assembles data into 12-frame transmission clusters.
210-0000053 rev02 TIM1500 User Guide Page 18 of 21
2.5 Line Code
Line code is the T1 mode of transmission. The two line code options for the TIM1500 both fall within
the International Telecommunication Union - Telecommunication Standardization Sector (ITU-T)
G.703 Standards for Transmission Facilities.
2.5.1 Bipolar with 8 Zero Substitution (default)
Bipolar with 8 Zero Substitution (B8ZS) line encoding uses bipolar violations to guarantee the
presence of pulses in the T1 line thereby helping to prevent loss of synchronization between
the TIM1500 and remote T1 equipment. B8ZS accommodates the minimum ones density
requirement in the North American public network.
2.5.2 Alternate Mark Inversion
Alternate Mark Inversion (AMI) alternates positive and negative pulses across the T1 line.
Although AMI links typically encounter long strings of zeros which can potentially cause loss of
synchronization between T1 units, Net to Net Technologies' T1 products meet the North
American minimum ones density requirement internally such that, even with AMI, loss of
synchronization is prevented between the TIM1500 and remote T1 equipment, just as it is with
B8ZS.
2.6 Speed
All T1 lines consist of 24 channels (timeslots) that continually run at 64 kbps for a collective
bandwidth of 1,536 kbps. Timeslot configuration dictates how many of the channels for each port
will actually receive data. Ports configured to operate as fractional T1 lines require contiguous
timeslots as indicated in the chart below.
Single Line T1 Bandwidth (kbps)
TIMESLOTS 1 - 24 1 - 21 1 - 18 1 - 15 1 - 12 1 - 9 1 - 6 1 - 3
COLLECTIVE
SPEED
1,536 1,344 1,152 960 768 576 384 192
3.0 ADDITIONAL INFORMATION
3.1 Configuration and Management
Once the TIM1500 has been installed, all parameter settings are software selectable via Command
Line Interface (CLI), Simple Network Management Protocol (SNMP) and/or Net to Net's Network
Management System (NMS) dependent upon the multiplexer uplink module (MUM) model installed
in your IP DSLAM. Refer to Net to Net's NMS Management User Guide
( http://www.nettonet.com/support/docs/210-0000048 ) and/or CLI Management User Guide
( http://www.nettonet.com/support/docs/210
management and interface module parameter configuration.
Default bandwidth utilizes
all 24 timeslots for a speed
of 1,536 kbps.
-0000052 ) for further instruction regarding IP DSLAM
210-0000053 rev02 TIM1500 User Guide Page 19 of 21
3.2 Data Storage
Upon initial power up of the IP DSLAM, default parameters of the TIM1500 will remain in place
unless changed via NMS, CLI or SNMP. Once changed, new configurations will automatically be
recorded in both the Random Access Memory (RAM) of the TIM1500 and the Non-Volatile Random
Access Memory (NVRAM) of the MUM. While data stored in TIM1500 RAM will be erased if the
module is removed from the IP DSLAM, or the IP DSLAM loses power, interface module data stored
within MUM NVRAM will remain intact (even if the chassis loses power) unless deliberately cleared or
reconfigured.
3.3 Regulatory Compliance
3.3.1 US Federal Communications Commission (FCC)
3.3.1.1 Class A Equipment
Note: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.
Caution: Changes or modifications not expressly approved by the manufacturer could
void the user’s authority to operate the equipment.
3.3.1.2 T1 Equipment
Note: This equipment complies with Part 68 of the FCC rules and bears a label that
contains the FCC registration number. This information must be provided to the
telephone company if requested. This equipment should be connected to the telephone
network or premise wiring using compatible modular plugs and cabling in compliance
with the requirements of Part 68 of the FCC rules, using the following standard jack
types:
z
RJ-48H: TIM1500-12, TIM1500-24, TAM1500-12 or TNE1500-P-12-AC/DC
z
RJ-48C: TNE1520-P, TNE1520-S, TNE1500-P, TNE1500-S, MIM-2T1, UIM-2T1 or
UIM-T1
In the unlikely event that this equipment harms the telephone network, the telephone
company can temporarily disconnect your service. The telephone company will try to
warn you in advance of any such disconnection, but if advance notice isn’t practical, it
may disconnect the service first and notify you as soon as possible thereafter. In the
event such a disconnection is deemed necessary, you will be advised of your right to file
a complaint with the FCC. Additionally, the telephone company may, from time to time,
make changes in its facilities, equipment, or operations that could affect the operation of
this equipment. If this occurs, the telephone company is required to provide you with
advance notice so you can make the modifications necessary to maintain uninterrupted
service.
210-0000053 rev02 TIM1500 User Guide Page 20 of 21
t
Caution: This unit does not contain any user serviceable parts. Repair service and/or
warranty information may be obtained by contacting Customer Support at Net to Net
Technologies, Inc.:
z
Address: 112 Corporate Drive, Portsmouth, NH 03801
z
Phone: (603) 427-0600 / (877) 638-2638
z
Email/Website: support@nettonet.com / www.nettonet.com
3.3.2 Industry Canada
3.3.2.1 Class A Equipment
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la Classe A est conforme à la norme NMB-003 du Canada.
3.3.2.2 T1 Equipment
Notice: The Industry Canada label identifies certified equipment. This certification means
that the equipment meets telecommunications network protective, operational, and
safety requirements as prescribed in the appropriate Terminal Equipment Technical
Requirements documents. The department does not guarantee the equipment will
operate to the user's satisfaction.
Before installing this equipment, users should ensure that it is permissible to be
connected to the facilities of the local telecommunications company. The equipment
must also be installed using an acceptable method of connection. The customer should
be aware that compliance with the above conditions may not prevent degradation of
service in some situations.
Repairs to certified equipment should be coordinated by a representative designated by
he supplier. Any repairs or alterations made by the user to this equipment, or equipment
malfunctions, may give the telecommunications company cause to request the user to
disconnect the equipment.
Users should ensure for their own protection that the electrical ground connections of
the power utility, telephone lines and internal metallic water pipe system, if present, are
connected together. This precaution may be particularly important in rural areas.
Caution: Users should not attempt to make such connections themselves, but should
contact the appropriate electric inspection authority, or electrician, as appropriate.
© Copyright 2003 Net to Net Technologies, Inc.
™ The Net to Net Logo is a trademark of Net to Net Technologies, Inc.
Worldwide Headquarters
Net to Net Technologies
112 Corporate Drive
Portsmouth, NH 03801
USA
+1 877-638-2638
210-0000053 rev02 TIM1500 User Guide Page 21 of 21
http://www.NetToNet.com/
Contact@NetToNet.com
Newbury Berkshire RG14 1EE
EMEA Headquarters
Net to Net Technologies
Victoria House 19 Park Way
UK
+44 (0) 1635 570950
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