Allied Telesis AT-AR040 Application guide

NETWORK SERVICE MODULE
HARDWARE REFERENCE

Network Service Module Hardware Reference
Document Number C613-03022-00 REV F.
Copyright © 1999-2002 Allied Telesyn International, Corp.
19800 North Creek Parkway, Suite 200, Bothell, WA 98011, USA.
All rights reserved. No part of this publication may be reproduced without prior written
permission from Allied Telesyn.
Allied Telesyn International, Corp. reserves the right to make changes in specifications
and other information contained in this document without prior written notice. The
information provided herein is subject to change without notice. In no event shall Allied
Telesyn be liable for any incidental, special, indirect, or consequential damages
whatsoever, including but not limited to lost profits, arising out of or related to this
manual or the information contained herein, even if Allied Telesyn has been advised of,
known, or should have known, the possibility of such damages.
All trademarks are the property of their respective owners.

Contents
Models Covered By This Reference .................................................................... 4
Why You Should Read This Reference ............................................................... 4
Where To Find More Information ...................................................................... 4
Compatible Base Units For NSMs ...................................................................... 5
What NSMs Do ................................................................................................. 5
Operating Environment And Regulatory Standards ............................................ 6
Environmental Conditions .......................................................................... 6
Regulatory Standards ................................................................................. 6
AT-AR040 NSM ................................................................................................. 7
AT-AR041 and AT-AR042 NSMs ......................................................................... 8
Basic Rate ISDN Interfaces .......................................................................... 8
ISDN S/T Interface Cables ......................................................................... 10
Testing a BRI NSM .................................................................................... 10
AT-AR048 NSM ............................................................................................... 12
DS3 Interface ........................................................................................... 13
DS3 Interface Cables ................................................................................ 13
Testing a DS3 NSM ................................................................................... 13
Hot Swapping ................................................................................................. 15
Hot Swapping the AR040 NSM with PICs ................................................. 15
How to Hot Swap an NSM ....................................................................... 15
Behaviour of Hot Swapped Interfaces ....................................................... 17
Troubleshooting .............................................................................................. 19
LEDs and What They Mean ....................................................................... 19
Contacting Us ................................................................................................. 23

4Network Service Module
C613-03022-00 REV F
Models Covered By This Reference
This Hardware Reference includes information on the following models:
■AT-AR040
■AT-AR041
■AT-AR042
■AT-AR048
The latest Hardware Reference can be found at www.alliedtelesyn.co.nz/
support/support.html.
Why You Should Read This Reference
This Reference has been developed to familiarise you with the hardware
features of Network Service Modules (NSMs). The Reference provides
information that will assist you with the process of managing and servicing an
NSM. For information about installing an NSM, see the Network Service Module
Quick Install Guide.
The Reference also introduces Port Interface Card (PIC) expansion options.
Detailed information on PICs can be found in the Port Interface Card Hardware
Reference. This Reference and the PIC Reference can be found on the CD-ROM
bundled with every switch or router, or at www.alliedtelesyn.co.nz/support/
support.html.
This Reference does not cover software configuration or physical installation procedures.
For information on software, refer to the Software Reference for your switch or router.
For information on installing an NSM, refer to the Network Service Module Quick
Install Guide. These guides and references can be found on the CD-ROM bundled with
NSM-compatible switches or routers, or at www.alliedtelesyn.co.nz/support/
support.html.
Where To Find More Information
There are several sources of further information:
■The Network Service Module Quick Install Guide, which outlines the
procedure for installing NSMs.
■The Hardware and Software References for your switch or router, which
provide information on related hardware and software features.
■The Port Interface Card Quick Install Guide, which outlines the procedure for
installing PICs; and the Port Interface Card Hardware Reference, which
provides detailed information on PICs.
All of these documents can be found on the CD-ROM bundled with your
switch or router, or at www.alliedtelesyn.co.nz/support/support.html.

Hardware Reference 5
C613-03022-00 REV F
Compatible Base Units For NSMs
Table 1 on page 5 lists NSM-ready products and indicates which NSM model
can be used in each.
1. Maximum DS3 packet forwarding rates are achieved only when the AT-AR048 is installed in a Rapier
24iwhose serial number ends with the letter N or higher. If maximum DS3 performance is not
required, the AT-AR048 can be installed in any Rapier 24iwhose serial number ends in J, K, L, or M.
The serial number can be found on the underside of the switch (see Figure1 on page5).
Figure 1: Serial number label, as found on underside of switch.
What NSMs Do
NSMs are expansion options for those switch and router models that have an
NSM bay. NSMs slot into a base-unit switch or router and either directly
provide additional WAN interfaces, or provide multiple slots where PICs (with
WAN interfaces) can be added.
Table 1: Compatibility of NSMs models.
Family Model(s) AR040 AR041 &
AR042
AR0481
Rapier Rapier 8/8 (MT & SC) 33
Rapier 16F-FX (MT-RJ & SC) 33
Rapier 24 33
Rapier i Rapier 24i333
AR800 Modular Switching Router AR816F-FX (MT-RJ & SC) 33
AR824 33
AR Routers AR740 33
AR745 33
Made in Singapore
Model : AT-RP241-10
Part Number: 990-11934-10
Product Serial Number: S03K225N
Quantity With Unit of
Measure:
1 EA 7 67035 14875
5
N or higher for maximum DS3
performance
J, K, L, or M for less demanding
DS3 applications

6Network Service Module
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Operating Environment And Regulatory
Standards
This section provides an overview of the recommended operating environment
for NSMs, as well as regulatory and conformance standards. Detailed safety
and conformance information can be found in the Safety and Statutory
Information booklet for your switch or router.
Environmental Conditions
• Operating temperature range: 0 to 40º C (32 to 104º F)
• Storage temperature range: -25 to 70º C (-13 to 158º F)
• Relative humidity range: 5 to 95% non-condensing
Regulatory Standards
AT-AR040
• Listing: UL, cUL, TUV
• Safety: UL 60950, CAN/CSA-C22.2 NO. 60950-00, EN60950, AS/
NZS3260 / TS001
• EMC: Radiated: EN55022 class A, FCC class A, VCCI class A, AS/NZS
CISPR22 class A
• Immunity: EN55024
AT-AR041 andAT-AR042
• Listing: UL, cUL, TUV
• Safety: EN60950, AS/NZS3260 / TS001
• EMC: Radiated: EN55022 class A, AS/NZS CISPR22 class A
• Immunity: EN55024
• Network interface: TBR3, ACA TS031, iDA ISDN 1
AT-AR048
•ListingUL,cUL
• Safety: UL60950, CAN/CSA-C22.2 No. 60950-00
• EMC: Radiated: FCC Part 15 class A, IC-03 class A
• Network interface: ANSI T1.102, ANSI T1.404, ANSI T1.107, ANSI
T1.231

Hardware Reference 7
C613-03022-00 REV F
AT-AR040 NSM
The AT-AR040 provides four Port Interface Card (PIC) slots (Figure 2 on
page 7).
Figure 2: AT-AR040 NSM with three PICs.
This NSM supports combinations of the following PICs (with a maximum of
two E1/T1/PRI cards):
• AT-AR020 PRI E1/T1 (Primary Rate ISDN)1
• AT-AR021 (S) BRI-S/T (Basic Rate ISDN S/T)
• AT-AR021 (U) BRI-U (Basic Rate ISDN U)
• AT-AR023 SYN (Synchronous RS-232/X21/V35 DCE/DTE to 2Mps)
• AT-AR024 ASYN4 (Four Asynchronous ports)
1. Up to two PRI E1/T1 PIC cards (AT-AR020) can be installed in the NSM. A
maximum of 32 TDM slots are allowed in each NSM row, and the maximum
aggregate bandwidth for each row is 2.6 Mbps. If two PRI E1/T1 PICs are
installed, the first must be in the lower row (bay 0 or 1), and the second must be
in the upper row (bay 2 or 3). If an AT-AR020 E1/T1 PRI PIC is installed in one
of the rows in the NSM and operating in E1 mode, then this row cannot also
have an AT-AR021(S) BRI-S/T PIC or an AT-AR021(U) BRI-U PIC installed.
AT-AR022 ETH PICs and AT-AR026 4ETH PICs are not recommended for use in the
NSM PIC bays, as performance of these interfaces is likely to be reduced and packet loss
may occur.
Interface numbering for AT-AR040 NSMs
Interface numbering for each interface type (e.g., BRI, PRI, SYN, ETH, PORT)
begins at 0 on the base switch or router and continues until all interfaces of that
type on the base unit are numbered. For AR700 Series routers, the numbering
then continues with the PIC interfaces installed directly in the router’s PIC
bays, starting at PIC bay 0. For switches and routers, the numbering then
continues with the interfaces installed in the NSM, starting with NSM PIC bay
0, and ending with NSM PIC bay 3.
It is recommended that PICs be installed in the router’s PIC bays and NSM’s
PIC bays in the above sequential order, so that interface numbering is not
changed when a new PIC is installed.
nsm4pic3
ASYN
30
SYN
Tx
Rx
AT-AR023 SYN PIC
Blank face-plate
AT-AR020 PRI E1/T1PIC
AT-AR024 ASYN4PIC
Active
D Data
B Data
PRI E1/T1
N

8Network Service Module
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AT-AR041 and AT-AR042 NSMs
The AT-AR041 NSM provides eight Basic Rate ISDN S/T WAN ports (Figure 3
on page 8), while the AT-AR042 NSM provides four Basic Rate ISDN S/T WAN
ports (Figure 4 on page 8). In both cases the ports use RJ-45 connectors and
provide TE interfaces. There are two status LEDs per port (Table 3 on page 20).
AT-AR041 and AT-AR042 NSMs support point-to-point links. Point to multi-point
links are not supported.
Figure 3: AT-AR041 NSM.
Figure 4: AT-AR042 NSM.
Basic Rate ISDN Interfaces
AT-AR041 and AT-AR042 NSMs provide Basic Rate ISDN (BRI S/T) interfaces,
which support two 64kbit/s channels and one 16kbit/s D channel.
Both BRI NSMs support only TE mode. The switch or router should be
configured as a TE for normal operation.
Board-mounted jumpers determine the interface termination. By default, the
jumpers are set in the Terminated position (bridging terminals 2 and 3) when
NSMs leave the factory (Figure 5 on page 9). To set the line pairs to Not
Terminated, remove the jumper and replace it so that it bridges terminals 1 and
2. If the building wiring provides the correct termination for an ISDN TE-to-NT
circuit, the jumper should be set in the Not Terminated position.
6754 2310
Data
Active
6754 2310
Data
Active
2310
Data
Active

Hardware Reference 9
C613-03022-00 REV F
Figure 5: Location of jumpers on BRI NSMs.
If the building wiring provides the correct termination for an ISDN TE-to-NT
circuit, the jumper should be set in the NotTerminated position
The Integrated Services Digital Network (ISDN) chapter of the Software Reference
for your switch or router has additional information on termination of ISDN
lines.
If you are unsure whether to terminate the line or not, contact your ISDN service
provider or your Authorised Allied Telesyn distributor or reseller.
The pinout of the BRI interface is shown in Table 2 on page 10.
3 2 1
3 2 1
RJ45 and LED blocks
Jumper set to Not Terminated
Jumper set to Terminated
(Factory default)
There are two jumpers per port. The AT-AR041 NSM,
therefore, has sixteen jumpers, while the AT-AR042 NSM has
eight jumpers. Each pair of jumpers set the Termination for the
port that they are closest to.

10 Network Service Module
C613-03022-00 REV F
ISDN S/T Interface Cables
Figure 6 on page 10 shows how to wire a cable to connect a Basic Rate Interface
(BRI) to the ISDN network terminating equipment (NT).
Figure 6: Pin wiring diagram for an ISDN Basic Rate straight-through Interface
cable.
Testing a BRI NSM
A Test Facility is built into all switch and router software. The Test Facility is
designed to test physical interfaces. Testing can be performed while the switch
or router is operational, but any interfaces being tested are dedicated to the Test
Facility. The Test Facility can be thought of as a specialised interface module
like PPP or Frame Relay.
When testing BRI interfaces, the Test Facility is used in conjunction with a BRI
S/T loopback plug. A loopback plug must be inserted into each interface that
you wish to test. Figure 7 on page 11 shows how to wire the loopback plug.
Table 2: Pinout of the Basic Rate ISDN S/T interface .
Pin S/T Interface Functions
1-
2-
3TX+
4RX+
5RX-
6TX-
7-
8-
RJ45
(to NT)
1
2
3
6
5
4
7
8
→
→
←
←
Not connected
Not connected
RX+
RX-
TX-
TX+
Not connected
Not connected
Notes:
(1) →Output from switch or router; ←Input to switch or router.
(2) Use twisted pair cable, with pairs 3 and 6, and 4 and 5.
(3) Each wire is connected to the same pins at each end.
(4) Cable version 1.0.
1
2
3
6
5
4
7
8
Not connected
Not connected
TX+
TX-
RX-
RX+
Not connected
Not connected
→
→
←
←
BRI1NT
RJ45
(to switch or router)