Verilink NetPath 2000 User manual

i
NetPathTM2000
Reference Manual
September 2005
34-00343.A

ii NetPath 2000
FCC Requirements Verilink products have been assembled from tested components 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 reference manual, may cause harm-
ful 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 inter-
ference at the user’s own expense.
Changes or modifications not expressly approved by Verilink could void the user’s authority to
operate this equipment.
Safety Precautions When handling this equipment, follow these basic safety precautions to reduce the risk of elec-
tric shock and injury:
• Follow all warnings and instructions marked on the product and in the manual.
• Unplug the hardware from the wall outlet before cleaning. Do not use liquid cleaners or aerosol clean-
ers. Use a slightly damp cloth for cleaning.
• Do not place this product on an unstable cart, stand, or table. It may fall, causing serious damage to
the product.
• Slots in the unit are provided for ventilation to protect it from overheating. These openings must not
be blocked or covered. Never place this product near a radiator or heat register.
• This product should be operated only from the type of power source indicated on the marking label
and manual. If you are unsure of the type of power supply you are using, consult your dealer or local
power company.
• Do not allow anything to rest on the power cord. Do not locate this product where the cord interferes
with the free movement of people.
• Do not overload wall outlets and extension cords, as this can result in fire or electric shock.
• Never push objects of any kind into the unit. They may touch dangerous voltage points or short out
parts that could result in fire or electric shock. Never spill liquid of any kind on this equipment.
• Unplug the equipment from the wall outlet and refer servicing to qualified service personnel under the
following conditions:
•When the power supply cord or plug is damaged or frayed.
•If liquid has been spilled into the product.
•If the product has been exposed to rain or water.
•If the product has been dropped or if the housing has been damaged.
Software License 1. General. The software, documentation and any fonts accompanying this License whether on
disk, in read only memory, on any other media or in any other form (collectively the “Soft-
ware”) are licensed, not sold, to you by Verilink Corporation. (“Verilink”) for use only under the
terms of this License, and Verilink reserves all rights not expressly granted to you. The rights
granted herein are limited to Verilink’s intellectual property rights in the Verilink Software and
do not include any other patents or intellectual property rights. You own the media on which the
Verilink Software is recorded but Verilink and/or Verilink’s licensor(s) retain ownership of the
Software itself.
2. Permitted License Uses and Restrictions. This License allows you to use one (1) copy of the
Software on within the NetPath 2000 unit. This License does not allow the Software to exist on
more than one such device or computer at a time, and you may not make the Software available
over a network where it could be used by multiple devices or multiple computers at the same
time. Except as and only to the extent expressly permitted in this License or by applicable law,
you may not copy, decompile, reverse engineer, disassemble, attempt to derive the source code
of, modify, or create derivative works of the Software or any part thereof. Any attempt to do so
is a violation of the rights of Verilink and its licensors of the Software. If you breach this restric-
tion, you may be subject to prosecution and damages. THE SOFTWARE IS NOT INTENDED
FOR USE IN WHICH THE FAILURE OF THE SOFTWARE COULD LEAD TO DEATH,
PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE.

iii
3. Transfer. You may not rent, lease, lend or sublicense the Software. You may, however, make a
one-time permanent transfer of all of your license rights to the Software to another party, pro-
vided that: (a) the transfer must include all of the Software, including all its component parts,
original media, printed materials and this License; (b) you do not retain any copies of the Soft-
ware, full or partial, including copies stored on a computer or other storage device; and (c) the
party receiving the Software reads and agrees to accept the terms and conditions of this License.
4. Termination. This License is effective until terminated. Your rights under this License will
terminate automatically without notice from Verilink if you fail to comply with any term(s) of
this License. Upon the termination of this License, you shall cease all use of the Verilink Soft-
ware and destroy all copies, full or partial, of the Verilink Software.
5. Disclaimer of Warranties. YOU EXPRESSLY ACKNOWLEDGE AND AGREE THAT USE
OF THE SOFTWARE IS AT YOUR SOLE RISK AND THAT THE ENTIRE RISK AS TO
SATISFACTORY QUALITY, PERFORMANCE, ACCURACY AND EFFORT IS WITH YOU.
EXCEPT FOR THE LIMITED WARRANTY AND TO THE MAXIMUM EXTENT PERMIT-
TED BY APPLICABLE LAW, THE SOFTWARE IS PROVIDED “AS IS”, WITH ALL
FAULTS AND WITHOUT WARRANTY OF ANY KIND, AND DANGER AND DANGER’S
LICENSORS (COLLECTIVELY REFERRED TO AS “DANGER” FOR THE PURPOSES OF
SECTIONS 5 AND 6) HEREBY DISCLAIM ALL WARRANTIES AND CONDITIONS
WITH RESPECT TO THE SOFTWARE, EITHER EXPRESS, IMPLIED OR STATUTORY,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES AND/OR CONDI-
TIONS OF MERCHANTABILITY, OF SATISFACTORY QUALITY, OF FITNESS FOR A
PARTICULAR PURPOSE, OF ACCURACY, OF QUIET ENJOYMENT, AND NONIN-
FRINGEMENT OF THIRD PARTY RIGHTS. DANGER DOES NOT WARRANT AGAINST
INTERFERENCE WITH YOUR ENJOYMENT OF THE SOFTWARE, THAT THE FUNC-
TIONS CONTAINED IN THE SOFTWARE WILL MEET YOUR REQUIREMENTS, THAT
THE OPERATION OF THE SOFTWARE WILL BE UNINTERRUPTED OR ERRORFREE,
OR THAT DEFECTS IN THE SOFTWARE WILL BE CORRECTED. NO ORAL OR WRIT-
TEN INFORMATION OR ADVICE GIVEN BY DANGER SHALL CREATE A WARRANTY.
SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE ENTIRE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION. SOME JURISDICTIONS DO
NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES OR LIMITATIONS ON
APPLICABLE STATUTORY RIGHTS OF A CONSUMER, SO THE ABOVE EXCLUSION
AND LIMITATIONS MAY NOT APPLY TO YOU.
6. Limitation of Liability. TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT-
SHALL DANGER BE LIABLE FOR PERSONAL INJURY, OR ANY INCIDENTAL, SPE-
CIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHATSOEVER, INCLUDING,
WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, LOSS OF DATA, BUSI-
NESS INTERRUPTION OR ANY OTHER COMMERCIAL DAMAGES OR LOSSES, ARIS-
ING OUT OF OR RELATED TO YOUR USE OR INABILITY TO USE THE SOFTWARE,
HOWEVER CAUSED, REGARDLESS OF THE THEORY OF LIABILITY (CONTRACT,
TORT OR OTHERWISE) AND EVEN IF DANGER HAS BEEN ADVISED OF THE POSSI-
BILITY OF SUCH DAMAGES. SOME JURISDICTIONS DO NOT ALLOW THE LIMITA-
TION OF LIABILITY FOR PERSONAL INJURY, OR OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THIS LIMITATION MAY NOT APPLY TO YOU. In no
event shall Verilink’s total liability to you for all damages (other than as may be required by
applicable law in cases involving personal injury) exceed the amount of fifty dollars ($50.00).
The foregoing limitations will apply even if the above stated remedy fails of its essential pur-
pose.
7. Export Law Assurances. You may not use or otherwise export or reexport the Software except
as authorized by United States law and the laws of the jurisdiction in which the Software was
obtained. In particular, but without limitation, the Software may not be exported or re-exported
(a) into (or to a national or resident of) any U.S. embargoed countries (currently Cuba, Iran,
Iraq, Libya, North Korea, Sudan and Syria) or (b) to anyone on the U.S. Treasury Department’s
list of Specially Designated Nationals or the U.S. Department of Commerce Denied Person’s
List or Entity List. By using the Software, you represent and warrant that you are not located in,
under control of, or a national or resident of any such country or on any such list.
8. Government End Users. The Software and related documentation are “Commercial Items”, as
that term is defined at 48 C.F.R. §2.101, consisting of “Commercial Computer Software” and

iv NetPath 2000
“Commercial Computer Software Documentation”, as such terms are used in 48 C.F.R. §12.212
or 48 C.F.R. §227.7202, as applicable. Consistent with 48 C.F.R. §12.212 or 48 C.F.R.
§227.7202-1 through 227.7202-4, as applicable, the Commercial Computer Software and Com-
mercial Computer Software Documentation are being licensed to U.S. Government end users (a)
only as Commercial Items and (b) with only those rights as are granted to all other end users
pursuant to the terms and conditions herein. Unpublished-rights reserved under the copyright
laws of the United States.
9. Controlling Law and Severability and Choice of Forum. This License will be governed by
and construed in accordance with the laws of the State of Colorado, as applied to agreements
entered into and to be performed entirely within Colorado between Colorado residents, that is,
without giving any effect to the choice of laws provisions of the State of Colorado. This License
shall not be governed by the United Nations Convention on Contracts for the International Sale
of Goods, the application of which is expressly excluded. If for any reason a court of competent
jurisdiction finds any provision, or portion thereof, to be unenforceable, the remainder of this
License shall continue in full force and effect. You agree that the only courts in which you will
bring lawsuits concerning the application or enforcement of this License are courts of competent
jurisdiction located in the State of Colorado and you consent to the exercise of jurisdiction by
any such court. This paragraph shall survive in full force and effect regardless of any termina-
tion of this License.
10. Third Party Notices and Conditions. The Software may include or utilize certain software
which is owned by the Open Source Foundation, the source code of which is available under the
GPL License (the “GPL”). Verilink may make modifications to this GPL Code. The license for
the GPL Code is included here as Exhibit A. Those terms are fully applicable to the use of those
portions of the Software that consist of or are derived from the GPL Code.

v
Table of Contents
Preface
About this Manual ..................................................................................................................................v
Manual Organization ........................................................................................................................v
Typographic Conventions ................................................................................................................v
Customer Service and Technical Support ............................................................................................. vi
Support from Verilink .................................................................................................................... vi
Telephone ................................................................................................................................ vi
E-mail ...................................................................................................................................... vi
Internet ..................................................................................................................................... vi
Returning a Unit to Verilink ................................................................................................................. vi
Chapter 1 About NetPath 2000
Introduction ......................................................................................................................................... 1-1
NetPath 2000 Backup Operation ........................................................................................................1-1
NetPath 2000 Secure Primary WAN Operation ........................................................................... 1-2
Front Panel ...................................................................................................................................1-3
Rear Panel .................................................................................................................................... 1-4
NetPath 2000 Interfaces ......................................................................................................... 1-4
Chapter 2 Installation
Unpacking and Inspection .................................................................................................................. 2-1
Supplied Materials .............................................................................................................................. 2-1
Additional Requirements .................................................................................................................... 2-2
Unpacking ........................................................................................................................................... 2-2
Connecting for Configuration ............................................................................................................. 2-2
Connecting to an External Router for Wireless Backup Operation ....................................................2-3
Chapter 3 Configuration
Web Access Authentication ................................................................................................................ 3-1
Status-Only Display ............................................................................................................................3-2
Administration-Level Status and Configuration Display ................................................................... 3-3
Modify Configuration .................................................................................................................. 3-4
Wireless Network Interface ................................................................................................... 3-6
Router Interface .....................................................................................................................3-6
Local Management Interface ................................................................................................. 3-6
VPN .......................................................................................................................................3-7

vi NetPath 2000
Applying Configuration Changes ................................................................................................ 3-8
Code Update ................................................................................................................................. 3-8
Restart Wireless ........................................................................................................................... 3-9
Reset Unit ..................................................................................................................................... 3-9
Access Point Names (APNs) ............................................................................................................ 3-10
Appendix A Specifications
Routing .............................................................................................................................................. A-1
VPN ................................................................................................................................................... A-1
Management ...................................................................................................................................... A-1
Hardware Interfaces ........................................................................................................................... A-2
Wireless Network Interface ............................................................................................................... A-2
Power ................................................................................................................................................. A-2
Mechanical ......................................................................................................................................... A-2
Environmental .................................................................................................................................... A-2
Industry Listings ................................................................................................................................ A-2

Preface vii
C HAPTER 0 P REFACE
About this Manual
This reference guide for the NetPath 2000 describes unit features and
specifications, configuration, and installation.
Manual Organization
The chapters and appendices in this manual are arranged for quick reference
when you need it.
•Chapter 1, "About NetPath 2000" – This chapter describes product features
and capabilities.
•Chapter 2, "Installation" – This chapter describes unit port connections and
powering information.
•Chapter 3, "Configuration" – This chapter describes the menu screens and
configuration parameters accessed through the Web server interface.
•Appendix A, "Specifications" −This appendix defines the specifications for
the NetPath 2000.
Typographic Conventions
The following table lists the graphic conventions used throughout this guide.
Convention Description
A Notice calls attentions to important features or instructions.
A Caution alerts you to serious risk of data loss or other
results that may cause you or the unit trouble if the warning is
not heeded.
A Warning alerts you to the risk of serious damage to the unit
or injury and possible death to the end user.

viii NetPath 2000
Customer Service and Technical Support
Verilink provides easy access to customer support through a variety of
services. This section describes these services.
Support from Verilink
If you are unable to receive support from your service provider or want to
contact us directly, Verilink offers worldwide customer support by telephone,
e-mail, and through Verilink’s Internet Web site.
Telephone
Customer support is available by telephone 24 hours a day, 7 days a week. To
speak directly with a Verilink customer service representative, you may dial
one of the following numbers:
•Sales and Marketing: 800-VERILINK (837-4546)
•Technical Support:800-285-2755 (toll-free)
1-256-327-2255 (international)
E-mail
You can request sales and marketing information or pose a technical support
question about your Verilink product by contacting us at the e-mail addresses
provided below. Verilink will respond to e-mailed requests for support during
regular business hours (8–5 CST, Monday–Friday).
•Sales and Marketing: [e-mail]
•Technical Support: [e-mail]
Internet
Visit Verilink’s Web site to access the latest Verilink product information,
technical publications, news releases, contact information, and more:
http://www.verilink.com
If this reference manual is revised to reflect code changes or other updates,
the most recent version will be posted to the Verilink Web site.
Returning a Unit to Verilink
If for any reason you must return your Verilink product, it must be returned
with the shipping prepaid, and packaged to the best commercial standard for
electronic equipment. Verilink will pay shipping charges for delivery on
return. You are responsible for mode and cost of shipment to Verilink.
You must have a Return Material Authorization (RMA) number marked on
the shipping package. Products sent to Verilink without RMA numbers will be
returned to the sender unopened, at the sender’s expense.

Preface ix
A product sent directly to Verilink for repair must first be assigned an RMA
number. You may obtain an RMA number by calling Customer Service at
800-926-0085, extension 3002 (international number: 1-800-256-327-2255).
When calling Verilink for an RMA, please have the following information
available:
•Model number and serial number for each unit
•Reason for return and symptoms of problem
•Purchase order number to cover charges for out-of-warranty items
•Name and phone number of person we can contact if we have questions about
the unit(s)
The address for you to use when returning a unit to Verilink will be provided
when the RMA is issued. The standard delivery method for return shipments
is Standard Ground for domestic returns and International Economy for
international returns (unless otherwise specified).

xNetPath 2000

About NetPath 2000 1-1
CHAPTER
1
C HAPTER 1 A BOUT N ET P ATH 2000
Introduction
The NetPath 2000 enables a branch office to maintain network connectivity in
case of a disruption in service due to an outage of the main network
connection. The NetPath 2000 uses Cingular’s wireless data network as an
alternate path to route mission-critical information.
NetPath 2000 Backup Operation
In a typical customer network (see Figure 1.1), the branch offices are
connected to their headquarters using Cisco 17xx routers via a T1 frame relay
network service to a central router located at their headquarters. The NetPath
2000 and the Cingular wireless network provide a fail-over mechanism by
creating a backup connection in the event this main connection (T1 frame
relay network connection) has a disruption in service. The branch office router
connects to the NetPath 2000 via a cross-over Ethernet cable. Dynamic Host
Configuration Protocol (DHCP) address assignment may be configured on this
NetPath 2000 Ethernet port (branch router Ethernet interface).

1-2 NetPath 2000
Figure 1.1 Typical Customer Network Configuration.
The simplest fail-over configuration uses a static secondary default or subnet
route in the branch office router via the NetPath 2000’s interface. When the
branch office router detects a failure of the primary default or headquarters
route over the T1 frame relay network, it switches its routing to the backup
Ethernet port and the NetPath 2000. The NetPath 2000 automatically connects
to the Cingular wireless network and routes traffic to the corporate
headquarters using the alternative wireless network.
When the main network connection is restored, the branch office router falls
back to using only this Frame Relay Network and ceases sending traffic via
the NetPath 2000. The NetPath 2000 continuously monitors and maintains its
wireless connection via periodic keep-alive packets in the event it is required
to provide network connectivity. While the main network connection is
providing connectivity, the branch office router should not send any idle or
keep-alive WAN traffic to the NetPath 2000 to avoid creating unnecessary
wireless traffic, but it may ping the NetPath 2000 local interface.
NetPath 2000 Secure Primary WAN Operation
The NetPath 2000 offers a method for secure network connectivity (see Figure
1.2). It uses Cingular’s 3G wireless data network as the primary means to
route mission-critical information employing internal Virtual Private Network
(VPN) functionality to maintain end-to-end security.
In a typical customer network, the branch offices are connected to their
headquarters through the NetPath 2000 and the Cingular wireless network.
The Cingular wireless network assigns the NetPath 2000 a network IP address
via a Point-to-Point Protocol (PPP) connection. The NetPath 2000, using
Network Address Translation (NAT) and DHCP, provides private address
Branch Offices
Branch Offices
Servers
Corporate Headquarters
Corporate Headquarters
Branch Offices
Branch Offices
Back-end
Frame Relay
or
VPN connection
Frame Relay T1
BranchOffice
Router
Carrier Frame
Relay Service
Wireless
Carrier
Network
Branch Office
Router
Frame Relay T1
Frame Relay T1s
Branch Offices
Branch Offices
Servers
Corporate Headquarters
Corporate Headquarters
Branch Offices
Branch Offices
Back-end
Frame Relay
or
VPN connection
Frame Relay T1
BranchOffice
Router
Carrier Frame
Relay Service
Wireless
Carrier
Network
Branch Office
Router
Frame Relay T1
Frame Relay T1s

About NetPath 2000 1-3
assignment to the branch office’s local network over its branch office router
Ethernet interface.
Figure 1.2 NetPath 2000’s Method for Secure Network Connectivity
Front Panel
The NetPath 2000 front panel is shown in Figure 1.3.
Figure 1.3 NetPath 2000 Front Panel
Power Switch with Light

1-4 NetPath 2000
The front panel’s power switch LED is illuminated with the unit is on.
Rear Panel
The NetPath 2000 rear panel is shown in Figure 1.4.
Figure 1.4 NetPath 2000 Rear Panel
The NetPath 2000 rear panel has three interfaces described in detail below.
NetPath 2000 Interfaces
The NetPath 2000 has the following interfaces:
Local Management Ethernet Interface
This is a direct Ethernet connection for local management and configuration.
The default IP address is 192.168.100.1, and this address is configurable.
DHCP can be configured ON or OFF for this interface.
Branch Router Ethernet Interface
This is a connection to the branch office router. The default IP address is
192.168.1.1, and this address is configurable. DHCP can be configured ON or
OFF for this interface.
PCMCIA Slot
This connection (slot) lets you use a PCMCIA wireless card.
Local
Mgmt Router
Wireless Card Inserted into PCMCIA SLOT
Power Connector

Installation 2-1
CHAPTER
2
C HAPTER 2 I NSTALLATION
This chapter describes the contents of your NetPath shipment and provides
information on connecting and installing the unit.
Unpacking and Inspection
The NetPath 2000is shipped in cardboard cartons with foam inserts for shock
and vibration protection. When your shipment arrives, inspect the shipping
container and contents, and compare all items with those on the packing list.
If the contents of the shipment are incomplete or if there is mechanical
damage or defect, notify Verilink. (Refer to Support from Verilink on page vi.)
If the shipping container or cushioning material is damaged, notify the carrier
and Verilink immediately and make a notation on the delivery receipt that the
container was damaged. (If possible, obtain the signature and name of the
person making delivery.) Retain the packaging material until the contents of
the shipment have been checked for completeness and the unit has been
checked both mechanically and electrically.
Supplied Materials
The NetPath 2000 ships with the following standard items:
•NetPath 2000
•External Power Supply
•AC Power Cord
•Cross-over CAT5 Ethernet Cable
The contents of the shipment are shown in Figure

2-2 NetPath 2000
Figure 2.1 Shipment Contents
Contact Verilink Technical Support (page vi) for assistance.
Additional Requirements
The NetPath 2000 has been designed to work with one of the following
wireless PCMCIA cards inserted:
•Novatel Merlin U520 UMTS
•Sony Ericsson GC83 EDGE
•Sierra Wireless AC775 EDGE
Unpacking
Remove the NetPath 2000 from the packing carton and place on a flat, stable
surface.
Remove the external power supply from the packing carton and plug the 4-pin
connector into the NetPath 2000 rear panel, making sure the flat portion of the
cable connector is facing the top of the unit.
Plug the AC cord into the external power supply.
Plug the AC cord into a standard AC wall outlet or power strip.
Look at the NetPath 2000 front panel. If the Power switch is not lit, press the
front panel Power switch once until lit.
Connecting for Configuration
To configure your NetPath 2000, connect one end of the crossover CAT5
cable (supplied) to the local management interface of the NetPath 2000.
Connect the other end of the CAT5 cable to a PC. The local management
Ethernet interface has a default IP address of 192.168.100.1, a subnet mask of

Installation 2-3
255.255.255.0, and comes DHCP enabled. Either enable DHCP under your
PC’s network settings, or configure your PC to an appropriate IP address such
as 192.168.100.2, subnet mask 255.255.255.0. For further information on
configuring your NetPath 2000, refer to Chapter 3, Configuration,.
Connecting to an External Router for Wireless Backup
Operation
For wireless backup, connect a straight-through CAT5 cable from the branch
router Ethernet interface to the branch office router.

2-4 NetPath 2000

Configuration 3-1
CHAPTER
3
C HAPTER 3 C ONFIGURATION
The NetPath 2000’s GUI is accessible from all three physical interfaces: the
local management Ethernet port, the branch router Ethernet port, or the
PCMCIA slot with card inserted. (Refer to NetPath 2000 Interfaces as
described on page 1-4 for more information on these interfaces.)
Web Access Authentication
Access your PC’s Web browser and type in the NetPath 2000’s IP address,
192.168.100.1, to view the screen shown in Figure 3.1.
Figure 3.1 NetPath 2000 Access Screen

3-2 NetPath 2000
NOTICE: You may need to disable personal firewalls or security programs to
access this screen.
The NetPath 2000 permits two levels of access. The first provides a status-
only display, and the second provides full status and configuration capability.
The default password for status-only access is “view.” This password is case-
sensitive.
Status-Only Display
After you enter the password, a status screen similar to that shown in Figure
3.2 will appear.
Figure 3.2 Sample Status Screen
The status display headings, a description of each, and parameters, where
appropriate, are listed below.
Card Service Automatically detects and displays the type of PCMCIA wireless network
card inserted and type of wireless network service operation.
Values: AC775GC82/U520
EDGE/UMTS
Link Status Displays the communication state of the inserted PCMCIA wireless network
card. “Down” indicates the card is searching to find the specific wireless
service. “Up” indicates the card and network are in service. “Restarting”
indicates the NetPath 2000 is attempting to recover from a communication
error with the card. “Unknown” indicates the NetPath 2000 cannot
communicate with the wireless network card.
Values: Down, Up, Restarting, Unknown
Signal Strength Displays the RSSI in dBm’s if the Link Status indicates anything other than
UP. Locate the NetPath 2000 where a signal is available. When the Link
Status indicates UP, the Signal Strength will display N/A.
Values: Dbm or N/A
Keep-Alive Displays the numbers of minutes between Keep-Alive transmissions.
Values: 1−60 min
Poll-Cnt Displays the number of polls.
Poll-Err Displays the number of polling errors.