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Cisco 3600 Series Multiservice Platforms

NM-16A/S 16-port Network Module

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Q&A

Asynchronous/Synchronous interfaces are the most versatile serial connections that Cisco offers. These interfaces support a wide variety of protocols and applications, including WAN concentration, transport of SDLC and Bi-sync data, and asynchronous terminal connections. Cisco announces the availability of the NM-16A/S that has double the interface density of the NM-8A/S.

Figure 1. NM-16A/S

Q. What are the differences between the NM-4A/S, NM-8A/S, and NM-16A/S?
A. In order to achieve higher port density, the NM-16A/S uses the Smart Serial connector that is also used on the WIC-2T WAN Interface Card. Thus customers must order Smart Serial cables for use with the NM-16A/S instead of the "5-in-1" cables used on the NM-4A/S and NM-8A/S. The Smart Serial interface supports all of the physical interfaces that are supported by the "5-in-1" interface, plus EIA/TIA-530A. The Smart Serial cables are shown in Table 1.

Table 1. Smart Serial Cables

Product Number

Cable Type

Length

Connector Type

CAB-SS-V35MT

V.35 DTE

10 feet (3 meters)

Male

CAB-SS-V35FC

V.35 DCE

10 feet (3 meters)

Female

CAB-SS-232MT

EIA/TIA-232 DTE

10 feet (3 meters)

Male

CAB-SS-232FC

EIA/TIA-232 DCE

10 feet (3 meters)

Female

CAB-SS-449MT

EIA/TIA-449 DTE

10 feet (3 meters)

Male

CAB-SS-449FC

EIA/TIA-449 DCE

10 feet (3 meters)

Female

CAB-SS-X21MT

X.21 DTE

10 feet (3 meters)

Male

CAB-SS-X21FC

X.21 DCE

10 feet (3 meters)

Female

CAB-SS-530MT

EIA/TIA-530 DTE

10 feet (3 meters)

Male

CAB-SS-530AMT

EIA/TIA-530A DTE

10 feet (3 meters)

Male

Q. Is there a converter to go between my existing "5-in-1" DB-60 cables and the Smart Serial port on the NM-16A/S?
A. Cisco does not make such an adapter. Cisco recommends that customers purchase new cables for use with the NM-16A/S.
Q. Are there any cable management solutions available for the NM-16A/S?
A. Cisco has worked with Components Express Inc ( http://www.networkcable.com) to produce patch panels to complement the NM-16A/S. Components Express Inc sells two models of patch panels for use with the NM-16A/S:

Smart Serial RS-232 DCE-DTE Patch Panel. This patch panel accepts 16 Smart Serial connections from the NM-16A/S on one side, and provides 16 DB-25 RS-232 female connectors on the other side. Each port is individually configurable for DCE or DTE mode. This patch panel provides RS-232 cabling flexibility while taking just one rack unit.

Configurable Patch Panel. This patch panel supports V.35, and EIA-530 as well as RS-232. Each port is individually configurable for interface type and DCE/DTE mode. This patch panel offers maximum cabling flexibility in two rack units.

For more information on these patch panels, please contact Components Express Inc.
Components Express, Inc.
10330 Argonne Woods Drive, Suite 100
Woodridge, IL 60517-4995
Phone: 630-257-0605 / 800.578.6695 (outside Illinois)
Fax: 630-257-0603
Q. What versions of Cisco IOS ® are required to support the NM-16A/S?
A. NM-16A/S support is included in 12.2(15)ZJ and the first release of 12.3T. All IOS® 12.4 main line and 12.4T releases support the NM-16A/S. The NM-16A/S is supported in all IOS ® feature sets.
Q. Which router models support the NM-16A/S?
A. The NM-16A/S is supported in the Cisco 2600XM Series, Cisco 2691, Cisco 2811, Cisco 2821, Cisco 2851, Cisco 3631, Cisco 3660, Cisco 3725, Cisco 3745, and Cisco 3800 Series.
Q. Why isn't the NM-16A/S supported in the 2600 non-XM models, 3620, 3640, or 3640A?
A. The 2600 non-XM models and the 3620 do not have enough memory capacity to introduce new hardware or software features. Refer to Product Bulletin 1975 for further details ( http://www.cisco.com/warp/public/cc/pd/rt/2600/prodlit/1975_pp.htm).
Cisco has announced the End of Sales and End of Life of the Cisco 3640 and Cisco 3640A routers. Cisco policy is not to introduce new hardware features after announcing End of Sales.
Q. How many NM-16A/S Network Modules are supported in each router?
A. The number of NM-16A/S Network Modules in a router is limited only by the available network module slots.
Q. What are the maximum speeds supported by the NM-16A/S?
A. Like the NM-4A/S and NM-8A/S, the NM-16A/S interfaces support a maximum synchronous speed of 128 Kbps, and a maximum asynchronous speed of 115.2 Kbps.
Q. What is "lead manipulation"?
A. The NM-16A/S introduces a new feature called "lead manipulation". This allows the user to ignore input signals on the physical interface, view the state of the input signals, and to monitor the transitions of the input signals.

IGNORING INPUT SIGNALS

By default, IOS requires some of the input leads on the physical interface to be asserted. With lead manipulation, the user can configure the serial interface to ignore input signals. The syntax is shown in Table 2.

Table 2. Lead Manipulation

Mode

Required Input Leads

Syntax to Ignore Input Leads

DTE

CTS, DCD, DSR

[no] ignore {cts | dcd | dsr}

DCE

RTS, DTR

[no] ignore {dtr | local-loopback | rts}

VIEWING THE STATE OF THE INPUT SIGNALS

The IOS will display the state of the input signals on the physical interface via show commands:

• For serial interfaces configured for synchronous communication, issue the IOS show interface command.

• For serial interfaces configured for asynchronous communication, issue the IOS show line command.

MONITORING INPUT SIGNAL TRANSITION

IOS introduces new debug commands to monitor lead transitions on the physical interface. Enable debugging of lead transitions with the no debug serial lead-transitions [serial slot/port] command.
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Addresses, phone numbers, and fax numbers are listed onthe Cisco Website at www.cisco.com/go/offices.Argentina · Australia · Austria · Belgium · Brazil · Bulgaria · Canada · Chile · China PRC · Colombia · Costa Rica · Croatia · Cyprus Czech Republic · Denmark · Dubai, UAE · Finland · France · Germany · Greece · Hong Kong SAR · Hungary · India · Indonesia · Ireland · Israel Italy · Japan · Korea · Luxembourg · Malaysia · Mexico · The Netherlands · New Zealand · Norway · Peru · Philippines · Poland · Portugal Puerto Rico · Romania · Russia · Saudi Arabia · Scotland · Singapore · Slovakia · Slovenia · South Africa · Spain · Sweden · Switzerland · Taiwan Thailand · Turkey · Ukraine · United Kingdom · United States · Venezuela · Vietnam · ZimbabweCopyright  2005 Cisco Systems, Inc. All rights reserved. CCSP, CCVP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, ScriptShare, SlideCast, SMARTnet, StrataView Plus, TeleRouter, The Fastest Way to Increase Your Internet Quotient, and TransPath are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries.All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0502R) 	205290.BH_ETMG_CC_7.05Printed in the USA Text Box:  Corporate HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706USAwww.cisco.comTel:	408 526-4000	800 553-NETS (6387)Fax:	408 526-4100	European HeadquartersCisco Systems International BVHaarlerbergparkHaarlerbergweg 13-191101 CH AmsterdamThe Netherlandswww-europe.cisco.comTel:	31 0 20 357 1000Fax:	31 0 20 357 1100	Americas HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706USAwww.cisco.comTel:	408 526-7660Fax:	408 527-0883	Asia Pacific HeadquartersCisco Systems, Inc.168 Robinson Road#28-01 Capital TowerSingapore 068912www.cisco.comTel: +65 6317 7777Fax: +65 6317 7799Cisco Systems has more than 200 offices in the following countries and regions. Addresses, phone numbers, and fax numbers are listed onthe Cisco Website at www.cisco.com/go/offices.Argentina · Australia · Austria · Belgium · Brazil · Bulgaria · Canada · Chile · China PRC · Colombia · Costa Rica · Croatia · Cyprus Czech Republic · Denmark · Dubai, UAE · Finland · France · Germany · Greece · Hong Kong SAR · Hungary · India · Indonesia · Ireland · Israel Italy · Japan · Korea · Luxembourg · Malaysia · Mexico · The Netherlands · New Zealand · Norway · Peru · Philippines · Poland · Portugal Puerto Rico · Romania · Russia · Saudi Arabia · Scotland · Singapore · Slovakia · Slovenia · South Africa · Spain · Sweden · Switzerland · Taiwan Thailand · Turkey · Ukraine · United Kingdom · United States · Venezuela · Vietnam · ZimbabweCopyright  2005 Cisco Systems, Inc. All rights reserved. CCSP, CCVP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, ScriptShare, SlideCast, SMARTnet, StrataView Plus, TeleRouter, The Fastest Way to Increase Your Internet Quotient, and TransPath are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries.All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0502R) 	205290.BH_ETMG_CC_7.05Printed in the USA