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Table of Contents

Release Notes for Cisco 2600 Series for Cisco IOS Release 12.1(2)XH

Release Notes for Cisco 2600 Series for Cisco IOS Release 12.1(2)XH

June 19, 2000

Note You can find the most current Cisco IOS documentation on Cisco Connection Online (CCO). These electronic documents may contain updates and modifications made after the hardcopy documents were printed.

These release notes for the Cisco 2600 series describe the enhancements provided in Cisco IOS Release 12.1(2)XH. These release notes are updated as needed.

For a list of the software caveats that apply to Cisco IOS Release 12.1(2)XH, see the "Caveats" section and Caveats for Cisco  IOS Release 12.1. The caveats document is updated for every maintenance release and is located on Cisco Connection Online (CCO)  and the Documentation CD-ROM.

Use these release notes with Cross-Platform Release Notes for Cisco  IOS Release 12.1 located on CCO  and the Documentation CD-ROM.

Contents

These release notes describe the following topics:

Introduction

The Cisco 2600 series modular access routers are designed to adopt future technologies and scale to accommodate network expansion. The Cisco 2600 series shares modular interfaces with the Cisco 1600, Cisco 1700, and Cisco 2600 series, providing:

The Cisco 2600 series modular architecture adapts to changes in network technology as new services and applications become available. Driven by a powerful RISC processor, the Cisco 2600 series supports the advanced quality of service (QoS), security, and network integration features required in evolving enterprise networks.

For information on new features and Cisco IOS commands supported by Cisco IOS Release 12.1(2)XH, see the "New and Changed Information" section and the "Related Documentation" section.

System Requirements

This section describes the system requirements for Cisco IOS Release 12.1(2)XH:

Minimum Memory Recommendations


Table 1: Memory Recommendations for the Cisco 2600 Series
Platforms Feature Sets Image Name Flash Memory Recommended DRAM Memory Recommended Runs
From

Cisco 2600 Series

IP Plus

c2600-is-mz

16 MB

40 MB

RAM

IP/IPX/AT/DEC Plus

c2600-ds-mz

16 MB

40 MB

RAM

Enterprise Plus

c2600-js-mz

16 MB

48 MB

RAM

Hardware Supported

Cisco IOS Release 12.1(2)XH supports the Cisco 2600 series routers:

For detailed descriptions of the new hardware features, see "New and Changed Information" section.


Table 2: Supported Interfaces for the Cisco 2600Series
Interface, Network Module, or Data Rate1 Product Description Platforms Supported
LAN Interfaces2

1- or 2-port Ethernet (10BaseT)

All Cisco 2600 series platforms

1-port Token Ring (RJ-45)

Cisco 2612, Cisco 2613

1- or 2-port 10/100 Mbps Ethernet

Cisco 2620, Cisco 2621

LAN Network Modules

1-port Ethernet

All Cisco 2600 series platforms

4-port Ethernet

All Cisco 2600 series platforms

1-port ATM-25 RJ-45 interface

All Cisco 2600 series platforms

Serial Network Modules

16- or 32-port asynchronous/synchronous serial low speed (128 kbps max)

All Cisco 2600 series platforms

4- or 8-port asynchronous/ synchronous serial low speed (128 kbps max)

All Cisco 2600 series platforms

Multiport T1/E1 ATM Network Modules with Inverse Multiplexing over ATM (IMA)3

4-port T1 ATM network module with IMA (NM-4T1-IMA)

All Cisco 2600 series platforms

4-port E1 ATM network module with IMA (NM-4E1-IMA)

All Cisco 2600 series platforms

8-port T1 ATM network module with IMA (NM-8T1-IMA)

All Cisco 2600 series platforms

8-port E1 ATM network module with IMA (NM-8E1-IMA)

All Cisco 2600 series platforms

ATM Network Modules

1-port ATM T3 network module (NM-1A-T3)

All Cisco 2600 series platforms

1-port ATM E3 network module (NM-1A-E3)

All Cisco 2600 series platforms

Digital T1 Packet Voice Trunk Network Modules and Spare Components

1-port, 24-channel T1 voice/fax module, supports 24 channels of medium-complexity codecs: G.729a/b, G.726, G.711 and fax or 12 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax. Consists of one NM-HDV, two PVDM-12s, and one VWIC-1MFT-T14. (NM-HDV-1T1-24)

All Cisco 2600 series platforms

1-port, enhanced 24-channel T1 voice/fax module, supports 24 channels of high- and medium-complexity codecs: G.729a/b, G.726, G.729, G.728, G.723.1, G.711, and fax. Consists of one NM-HDV, four PVDM-12s, and one VWIC-1MFT-T14. (NM-HDV-1T1-24E)

All Cisco 2600 series platforms

2-port, 48-channel T1 voice/fax module, supports add/drop multiplexing (drop and insert); 48 channels of medium-complexity codecs: G.729a/b, G.726,G.711, and fax; or 24 channels of G726, G729, G723.1, G.728, G729a/b, G711, and fax. Consists of one NM-HDV, four PVDM-12, and one VWIC-2MFT-T1-DI4. (NM-HDV-2T1-48)

All Cisco 2600 series platforms

High-density voice/fax network module spare (NM-HDV)

Digital T1/E1 packet voice trunk network modules spare component

12-channel packet voice DSP module upgrade spare (PVDM-12)

Digital T1/E1 packet voice trunk network modules spare component

1-port RJ-48 multiflex trunk - T1 (VWIC-1MFT-T1)4

Digital T1/E1 packet voice trunk network modules spare component

2-port RJ-48 multiflex trunk - T1 (VWIC-2MFT-T1)4

Digital T1/E1 packet voice trunk network modules spare component

2-port RJ-48 multiflex trunk with drop and insert - T1 (VWIC-2MFT-T1-DI)4

Digital T1/E1 packet voice trunk network modules spare component

Digital E1 Packet Voice Network Modules

1-port, 30-channel E1 High-Density Voice Network Module (NM-HDV-1E1-30)

All Cisco 2600 series platforms

1-port, Enhanced 30-channel E1 High-Density Voice Network Module (NM-HDV-1E130E)

All Cisco 2600 series platforms

2-port, 60-channel High-Density Voice Network Module (NM-HDV-2E1-60)

All Cisco 2600 series platforms

Dial, ISDN and Channelized Serial Network Modules

1- or 2-port channelized T1/ISDN PRI

All Cisco 2600 series platforms

1- or 2-port channelized T1/ISDN PRI with CSU

All Cisco 2600 series platforms

1- or 2-port channelized E1/ISDN PRI balanced

All Cisco 2600 series platforms

1- or 2-port channelized E1/ISDN PRI unbalanced

All Cisco 2600 series platforms

4-or 8-port ISDN BRI S/T interface

All Cisco 2600 series platforms

4- or 8-port ISDN BRI U (NT1) interface

All Cisco 2600 series platforms

8- or 16-port analog modems

All Cisco 2600 series platforms

T1/E1 Multiflex Voice/WAN Interface Cards5

1-port T1 multiflex trunk interface (VWIC-1MFT-T1)

All Cisco 2600 series platforms

1-port E1 multiflex trunk interface (VWIC-1MFT-E1)

All Cisco 2600 series platforms

2-port T1 multiflex trunk interface (VWIC-2MFT-T1)

All Cisco 2600 series platforms

2-port E1 multiflex trunk interface (VWIC-2MFT-E1)

All Cisco 2600 series platforms

2-port T1 multiflex trunk interface with Drop and Insert (VWIC-2MFT-T1-DI)

All Cisco 2600 series platforms

2-port E1 multiflex trunk interface with Drop and Insert (VWIC-2MFT-E1-DI)

All Cisco 2600 series platforms

Voice/Fax Interface Cards

1- or 2- voice interface card slots

All Cisco 2600 series platforms

1-slot high-density T1/E1 voice interface card slots6

All Cisco 2600 series platforms

2-port FXS voice/fax interface card7

All Cisco 2600 series platforms

2-port E&M voice/fax interface card3

All Cisco 2600 series platforms

2-port FXO voice/fax interface card3

All Cisco 2600 series platforms

WAN Interface Cards

1-port ISDN BRI S/T interface (requires external NT1)

All Cisco 2600 series platforms

1-port ISDN BRI (NT1) U

All Cisco 2600 series platforms

1-port 56/64-kbps DSU/CSU

All Cisco 2600 series platforms

1-port T1/Fractional T1 with DSU/CSU

All Cisco 2600 series platforms

1-port high-speed serial (up to 2.048 Mbps)

All Cisco 2600 series platforms

2-port dual high-speed serial (up to 2.048 Mbps; asynchronous/synchronous support)

All Cisco 2600 series platforms

2-port asynchronous/synchronous (up to 128 kbps)

All Cisco 2600 series platforms

Advanced Integration Module

Data compression AIM (up to 8.192 Mbps)

All Cisco 2600 series platforms

1The voice/fax and ATM-25 network modules require Cisco IOS Plus feature sets.
2The 1- or 2-port 10/100 Ethernet LAN interface for the Cisco 2620 and Cisco 2621 series routers is only available in Cisco IOS Release 12.0 XC and later.
3Requires the Cisco IOS Plus feature sets.
4See T1/E1 multiflex voice/WAN interface cards in this table.
5T1 multiflex voice/WAN interface cards can be used in a chassis slot or installed in a digital T1 packet voice trunk module. E1 multiflex voice/WAN interface cards can be installed in a chassis slot.
6Uses the VWIC-MFT T1/E1 interface cards.
7Requires the NM-1V or NM-2V network module.

Determining the Software Version

To determine the version of Cisco IOS software running on your Cisco 2600, log in to the Cisco 2600 and enter the show version EXEC command:

    router> show version
Cisco Internetwork Operating System Software 
IOS (tm) 12.1 Software (c2600-i-mz), Version 12.1(2)XH, RELEASE SOFTWARE

Upgrading to a New Software Release

For general information about upgrading to a new software release, see Upgrading the Cisco   IOS Software Release in Cisco Routers and Modems  located at:

http://www.cisco.com/warp/public/620/6.html

Other Firmware Code

The latest version of analog modem firmware for the Cisco 2600 series supports the internal analog modems (both NM-16AM and NM-8AM) in a wide range of countries, starting with Cisco IOS Release 11.3(5)T and later releases. The latest firmware (version 1.2.0) also supports dial-out and fax-out.

On CCO, beginning under the Service & Support heading:

Technical Documents: Documentation Home Page: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers: Analog Modem Firmware

On the Documentation CD-ROM at:

Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers: Analog Modem Firmware

Feature Set Tables

The Cisco IOS software is packaged in feature sets consisting of software images---depending on the platform. Each feature set contains a specific set of Cisco IOS features.

Cisco IOS Release supports the same feature sets as Cisco IOS Release 12.1, but Cisco IOS Release 12.1(2)XH can include new features supported by the Cisco 2600 series.


Table 3: Feature List by Feature Set for the Cisco 2600 Series
Feature Sets Feature Set Matrix Term Software Image Platforms
IP Standard
Feature Sets

IP Plus

  • Basic

  • Plus

c2600-is-mz

All Cisco 2600 series platforms

IP/IPX/AppleTalk/
DEC Standard
Feature Sets

IP/IPX/AT/DEC Plus

  • Basic

  • Plus

c2600-ds-mz

All Cisco 2600 series platforms

Enterprise Standard
Feature Sets

Enterprise Plus

  • Plus

c2600-js-mz

All Cisco 2600 series platforms

Note Cisco IOS images with strong encryption (including, but not limited to 168-bit (3DES) data encryption feature sets) are subject to United States government export controls and have limited distribution. Strong encryption images to be installed outside the United States are likely to require an export license. Customer orders may be denied or subject to delay due to United States government regulations. When applicable, purchaser/user must obtain local import and use authorizations for all encryption strengths. Please contact your sales representative or distributor for more information, or send an e-mail to export@cisco.com.

Table 4 lists the features and feature sets supported by the Cisco 2600 series in Cisco IOS Release 12.1(2)XH and uses the following conventions:

Note These feature set tables only contain a selected list of features. The tables are not cumulative---nor do they list all the features in each image.


Table 4: Feature List by Feature Set for the Cisco 2600 Series---Part 1 of 2
Features Feature Sets
IP
Plus 		IP/IPX/AT/DEC
Plus 		Enterprise
Plus
New Features In 12.1(2)XH
Transparent Common Channel Signaling (T-CCS)

Yes

Yes

Yes

Feature Group D Support

Yes

Yes

Yes

ISDN Enhancements for Digital T1/E1 NMs

Yes

Yes

Yes

E1 and R2 Signaling

Yes

Yes

Yes

Network Side PRI Signaling

Yes

Yes

Yes

Caller ID Support (CLID)

Yes

Yes

Yes

Multicast Hoot and Holler Conferencing over IP

Yes

Yes

Yes

T1/E1 Multiflex VWIC Enhancements

Yes

Yes

Yes

Connectivity
Bidirectional PIM

Yes

Yes

Yes

Common Open Policy Service (COPS) for RSVP

Yes

Yes

Yes

1FE2P Network Module

Yes

Yes

Yes

Fast Ethernet (10/100BaseT) Network Ports1

Yes

Yes

Yes

Layer 2 Tunneling Protocol (L2TP)

Yes

Yes

Yes

Layer 2 Tunneling Protocol Dial-out (L2TP)

Yes

Yes

No

RIP Enhancements

Yes

Yes

Yes

IBM Support
DLSw+ Ethernet Redundancy

Yes

Yes

Yes

DLSw+ Load Balancing Enhancements

Yes

Yes

Yes

DLSw+ Peer Group Cluster

Yes

Yes

Yes

DLSw+ RSVP Bandwidth Reservation

Yes

Yes

Yes

SNA Switching Services

No

No

No

IP/IPX Routing
OSPF Flooding Reduction

Yes

Yes

Yes

PGM Host

No

No

Yes

Airline Product Set Enhancements

Yes

Yes

Yes

Service Assurance Agent Enhancements

Yes

Yes

Yes

Async over UDP

Yes

Yes

Yes

Asynchronous Call Queuing

Yes

Yes

Yes

Data Compression Advanced Interface Module (AIM)

Yes

Yes

Yes

DHCP Server

Yes

Yes

Easy IP Phase 2-DHCP Server

Yes

Flow-based WRED

Yes

Yes

Yes

Fast-switched Compressed RTP

Yes

Yes

Yes

IPX Infrastructure Enhancements

No

Yes

IS-IS Multiarea Support

No

No

No

NetFlow Policy Routing

Yes

Yes

Yes

OSPF Packet Pacing

Yes

Yes

Yes

PGM Router Assist

Yes

Yes

Yes

Response Time Reporter (RTR) Enhancements

Yes

Yes

Yes

Service Assurance Agent Enhancements (formerly RTR)

Yes

Yes

Yes

Web Cache Communications Protocol V2 (WCCPv2)

Yes

Yes

Yes

Management
CNS Client for Cisco IOS Software (IPSec Policy Agent II)

No

No

Yes

ISDN MIB RFC 2127

Yes

Yes

Yes

Multicast Routing Monitor

Yes

Yes

Yes

Process MIB

Yes

Yes

Yes

SNMP Version 3

Yes

Yes

Yes

Subnetwork Bandwidth Manager

Yes

Yes

Yes

Multimedia and Quality of Service
Gateway-to-Gatekeeper Billing Redundancy

Yes

Yes

Yes

Ecosystem Gatekeeper Interoperability Enhancements

Yes

Yes

Yes

Ecosystem Gatekeeper Interoperability Enhancements

Yes

Yes

Yes

Gatekeeper-to-Gatekeeper Redundancy and Load Sharing

No

No

No

H.323 Version 2, Phase 2

Yes

Yes

Yes

H.323 Support for Virtual Interfaces

Yes

Yes

Yes

CLI String Search

Yes

Yes

Yes

Gateway Support for Alternate Gatekeeper

Yes

Yes

Yes

Express RTP and TCP Header Compression

Yes

Yes

Yes

H.235 Accounting and Security Enhancements for Cisco Gateways

No

No

No

H.323 Version 2 Support

Yes

Yes

Yes

Multimedia Conference Manager

No

No

No

H.323 Multizone Enhancements

Yes

Yes

Yes

IP to ATM Class of Service (CoS)

Yes

Yes

Yes

Security
Wildcard Pre-Shared Key Enhancement

No

No

No

IKE Shared Secret Using AAA Server

No

No

NO

IKE Extended Authentication

No

No

No

Secure Shell (SSH) Version 1

Yes

Yes

Yes

AAA Server Group Deadtimer

Yes

Yes

Yes

AAA Broadcast Accounting

Yes

Yes

Yes

Triple DES Encryption

No

No

No

Cisco Secure Integrated Software

No

No

No

Cisco IOS Firewall Feature Set Platform Support

No

No

No

Firewall Feature Set Enhancements

No

No

No

Switching
Cisco IOS STP Enhancements

Yes

Yes

Yes

Voice
Session Initiation Protocol (SIP)

Yes

Yes

Yes

Dial Peer Enhancements

Yes

Yes

Yes

Asynchronous Rotary Line Queuing

Yes

Yes

Yes

Answer Supervision Reporting

Yes

Yes

Yes

Configurable Timers in H.225

Yes

Yes

Yes

Voice Busyout Enhancements

Yes

Yes

Yes

Digital E1 Packet Voice Trunk Network Modules

Yes

Yes

Yes

Voice over Frame Relay Configuration Updates (FRF.11 and FRF.12)

Yes

Yes

Yes

QSIG Protocol Support

Yes

Yes

Yes

1- and 2-Port T1/E1 Multiflex VWICs

Yes

Yes

Yes

Busyout Monitor

Yes

Yes

Yes

BRI Voice over IP: VIC-2BRI-S/T-TE

Yes

Yes

Yes

Digital T1 Packet Voice Trunk Network Modules

Yes

Yes

Yes

Interactive Voice Response for Cisco Access

Yes

Yes

Yes

Voice over Frame Relay Enhancements (Queuing)

Yes

Yes

Yes

WAN Optimization
Frame Relay Switching Enhancements: Shaping and Policing

Yes

Yes

Yes

Frame Relay PVC Interface Priority Queuing

Yes

Yes

Yes

Low Latency Queuing for Frame Relay

Yes

Yes

Yes

Class-Based Weighted Fair Queuing

Yes

Yes

Yes

WAN Services
Settlement for Packet Telephony

No

No

No

ISDN Network Side for ETSI Net5 PRI

Yes

Yes

Yes

ATM T3/E3 NM

Yes

Yes

Yes

802.1Q Support and ISL VLAN1

Yes

Yes

Yes

Annex G (X.25) over Frame Relay

Yes

Yes

Yes

Debit Card for Packet Telephony

Yes

Yes

Yes

DNS-Based X.25 Routing

Yes

Yes

Yes

Frame Relay ATM Interworking FRF.5/.8

Yes

Yes

Yes

Frame Relay End-to-End Keepalive

Yes

Yes

Yes

IEEE 802.1Q Support

Yes

Yes

No

ISDN Dynamic Multiple Encaps for Dial-in

Yes

Yes

Yes

ISDN Dynamic Multiple Encaps for Dial-in with Frame Relay Support

Yes

Yes

Yes

Mobile IP

Yes

Yes

Yes

Multicast Source Discovery Protocol (MSDP)

Yes

Yes

Yes

Multiport T1/E1 ATM Network Module with Inverse Multiplexing over ATM

Yes

Yes

Yes

PPP over Frame Relay

Yes

Yes

Yes

Time-based Access Lists

Yes

Yes

Yes

VPDN Group Reorganization

No

Yes

Yes

VPDN Per-user Configuration

No

Yes

Yes

VPN Tunnel Management

No

Yes

Yes

X.25 Closed User Groups

Yes

Yes

No

X.25 Load Balancing

No

No

Yes

X.25 Switch Local Acknowledgment

No

No

No

X.25 over ISDN D-Channel

Yes

Yes

Yes

X.25 Remote Failure Detection

Yes

Yes

Yes

1Cisco 2620 and 2621 only

New and Changed Information

The following sections list the new hardware and software features supported by the Cisco 2600 series for Cisco IOS Release 12.1(2)XH.

New Software Features in Cisco IOS Release 12.1(2)XH

Transparent Common Channel Signaling (T-CCS) on Cisco 2600, 3600, 7200 and 7500 Series Routers

Transparent CCS allows the connection of two PBXs with PRI or BRI interfaces that use one CCS protocol without the need for interpretation of CCS signaling for call processing. A PBX PRI group is transported transparently through the data network and this feature preserves proprietary signaling. From the PBX standpoint, this is accomplished through a point-to-point connection. Calls from the PINXs are not routed, but follow a preconfigured route to the destination.

The following hardware provides support for the Transparent CCS (T-CCS) feature, which provides a way to interconnect private branch exchanges (PBXs), key systems (KTs), and central office switches (COs) when the Private Integrated Services Network Exchange (PINX) does not support QSIG, or when the PINX uses a proprietary solution:

If you are configuring your Digital T1/E1 Packet Voice Trunk Network Module or T1/E1 Digital Voice Port Adapter to route signaling traffic for Voice over Frame Relay (VoFR) you can configure transparent CCS using CCS frame-forwarding.

If you are configuring your Digital T1/E1 Packet Voice Trunk Network Module or T1/E1 Digital Voice Port Adapter to route signaling traffic for Voice over Internet Protocol (VoIP), transparent CCS is configured by routing traffic over a clear channel codec.

Restrictions

This feature has the following restrictions:

Feature Group D Support on Digital T1/E1 Packet Voice Trunk Network Modules

This feature extends support for Feature Group D signaling on the Digital T1/E1 packet voice trunk network modules on Cisco 2600 and 3600 series routers.

Cisco 2600 and 3600 series routers must use Feature Group D to provide Voice over IP (VoIP) functionality in the carrier environment.

Feature Group D is a trunk-side local access transport area (LATA) access that supplies the following features:

ISDN Enhancements for Digital T1/E1 Packet Voice Trunk Network Modules on Cisco 2600 and 3600 Series Routers

The digital T1/E1 packet voice trunk network modules on Cisco 2600 series and 3600 series routers now support the following enhancements for ISDN call processing:

E1 R2 and Channel-Associated signaling on the Digital T1/E1 Packet Voice Trunk Network Module

The Cisco Digital T1/E1 Packet Voice Trunk Network Modules now support:

The Cisco Digital T1/E1 Packet Voice Trunk Network Module supports channel-associated signaling for channelized E1 lines, which are commonly deployed in networks in Latin America, Asia, and Europe. Channel-associated signaling is configured to support channel banks in the network that convert various battery and ground operations on analog lines into signaling bits, which are forwarded over digital lines.
Channel-associated signaling is call signaling that is configured on an E1 controller and enables the router to send or receive analog calls. The signaling uses the16th channel (timeslot); thus, channel-associated signaling fits in the out-of-band signaling category.
R2 signaling is an international signaling standard that is common to channelized E1 networks. However, there is no single signaling standard for R2. The ITU-T Q.400-Q.490 recommendation defines R2, but a number of countries and geographic regions implement R2 in entirely different ways. Cisco Systems addresses this challenge by supporting many localized implementations of R2 signaling in Cisco  IOS software.
The Cisco Systems E1 R2 signaling default is ITU, which supports the following countries: Denmark, Finland, Germany, Russia (ITU variant), Hong Kong (ITU variant), and South Africa (ITU variant). The expression "ITU variant" means there are multiple R2 signaling types in the specified country, but Cisco supports the ITU variant.
Cisco Systems also supports specific local variants of E1 R2 signaling in the following regions, countries, and corporations:

Configuring Digital T1/E1 Packet Voice Trunk Network Modules for WAN Data Traffic

Cisco digital T1/E1 packet voice trunk network modules support voice and data applications on Cisco 2600 and 3600 series routers. With Cisco IOS Release 12.1(2)XH, the digital T1/E1 packet voice trunk network modules provide WAN data connections in addition to voice connections and digital cross-connect.

The digital T1/E1 packet voice trunk network modules support T1/E1 applications, including fractional use. The T1 version integrates a fully managed data service unit/channel service unit (DSU/CSU), and the E1 version includes a fully managed DSU. The digital T1/E1 packet voice trunk network modules provide per-channel T1/E1 data rates of 64 or 56 kbps for WAN services (Frame Relay or leased line).

Restrictions

The following restrictions apply to digital T1/E1 packet voice trunk network module configurations:

Network Side PRI Signaling, Trunking, and Switching

The Network Side PRI Signaling, Trunking, and Switching feature enables Cisco IOS software to replicate the public switched network interface to a PBX that is compatible with the National ISDN (NI) and ETSI Net5 switch types.

Routers and PBXs are both traditionally CPE with respect to the public switched network interfaces. For Voice over IP (VoIP) applications, it is desirable to interface access servers to PBXs with the access server representing the public switched network.

Enterprise organizations use the current Voice over IP (VoIP) features with Cisco products as a method to reduce long distance costs for phone calls within and outside their organizations. However, there are times that a call cannot go over VoIP and the call needs to be placed using the Public Switched Telephone Network (PSTN). The customer then must have two devices connected to a PBX to allow some calls to be placed using VoIP and some calls to be placed over the PSTN. In contrast, this feature allows Cisco access servers to connect directly to user-side CPE such as PBXs and allows voice calls and data calls to be placed without requiring two different devices to be connected to the PBXs.

The ISDN Network Side PRI Signaling, Trunking, and Switching feature allows Cisco ISDN-enabled access servers to switch calls across interfaces as legacy phone switches do today and to mimic the behavior of the legacy phone switches.

Caller ID on 2600, 3600, and MC3810

Caller ID (sometimes called CLID or ICLID for incoming call line identification) is an analog service offered by a Central Office (CO), which supplies calling party information to subscribers. Typically, the calling party number, and sometimes the name, appears on a station (also called extension) device such as a PC telephony software application screen or the display on a telephone. Type 1 Caller ID provides the calling party information while the call is ringing, and Type 2 Caller ID provides the additional convenience of calling number display while the recipient is on another call. In this release, Cisco provides only Type 1 Caller ID support.

The Caller ID feature supports the sending of calling party information from Foreign Exchange Station (FXS) loop-start and ground-start ports into a Caller-ID equipped telephone device. The FXS port emulates the extension interface of a private-branch exchange (PBX) or the subscriber interface for a CO switch.

The Caller ID feature supports receiving calling-party information at Foreign Exchange Office (FXO) loop-start and ground-start ports. The FXO port emulates a connection to a telephone and allows connection to a PBX extension interface or (where regulations permit) a CO subscriber line.

Multicast Hoot and Holler Conferencing over IP

The voice multicasting feature uses Cisco voice over IP technology to create a permanently connected point-to-multipoint hoot-and-holler network over an IP connection. Hoot and holler is a broadcast audio network used extensively by the brokerage industry for market updates and trading. These applications can reap significant advantages by running over an IP network because any idle bandwidth can be reclaimed by data applications. Similar networks are also used in publishing, transportation, power plants, and manufacturing.

You can connect voice multicasting telephones to network routers in any of the following ways:

Note Voice multicasting over FXS and FXO voice interface cards is not supported at this time.
Note The voice multicasting feature supports only one T1 line per high-density voice network module.

T1/E1 Multiflex VWIC Enhancements

CLI Reset, Microcode Reload Functionality

You can reload the firmware and FPGA on the VWIC from the CLI without reloading the Cisco IOS image by using the new microcode reload controller command.

BERT, T1 Line and Payload Loopback Initiation

Bit-error-rate testing (BERT) and loopbacks are used by carriers and ISPs to help resolve problems as well as test the quality of T1/E1 links. By early detection of poor quality links and quick problem isolation, network operators can improve their network's quality of service and increase their revenues:

Time-division multiplexing (TDM)

Time-division multiplexing (TDM) allows switching of channels between ports 1 and 2. The card accomodates TDM groups, which are groups of timeslots that may be sent from one E1/T1 trunk to another without being terminated. This allows you to allocate some timeslots (TDM groups) for pass-through while other timeslots (channel groups) are terminated as a serial link. By using these two abilities, you can connect traffic from any TDM-based device to any other TDM-based device in the system, as long as there is a path and enough bandwidth between the devices.

Important Notes

Product Number Change

Beginning with Cisco IOS Release 12.0(7)XK, Cisco changed the product numbers used to order a specific Cisco IOS software image. In short, Cisco will remove the periods separating the release train, maintenance release, and build number. The following table provides some examples.

Old Product Number New Product Number Release Image Description

S364AR1K2-12.1.2=

S364AR1K2-1212=

Cisco IOS Release 12.1(2)

Cisco 3640 Series IOS Enterprise/SNA SW PLUS IPSEC 3DES

S26CP-12.1.2=

S26CP-1212=

Cisco IOS Release 12.1(2)

Cisco 2600 Series IOS IP Plus

MIBs

Old Cisco Management Information Bases (MIBs) will be replaced in a future release. Currently, OLD-CISCO-* MIBs are being converted into more scalable MIBs---without affecting existing Cisco IOS products or NMS applications. You can update from deprecated MIBs to the replacement MIBs as shown in Table 5.


Table 5: Deprecated and Replacement MIBs
Deprecated MIB Replacement

OLD-CISCO-APPLETALK-MIB

RFC1243-MIB

OLD-CISCO-CHASSIS-MIB

ENTITY-MIB

OLD-CISCO-CPUK-MIB

To be decided

OLD-CISCO-DECNET-MIB

To be decided

OLD-CISCO-ENV-MIB

CISCO-ENVMON-MIB

OLD-CISCO-FLASH-MIB

CISCO-FLASH-MIB

OLD-CISCO-INTERFACES-MIB

IF-MIB CISCO-QUEUE-MIB

OLD-CISCO-IP-MIB

To be decided

OLD-CISCO-MEMORY-MIB

CISCO-MEMORY-POOL-MIB

OLD-CISCO-NOVELL-MIB

NOVELL-IPX-MIB

OLD-CISCO-SYS-MIB

(Compilation of other OLD* MIBs)

OLD-CISCO-SYSTEM-MIB

CISCO-CONFIG-COPY-MIB

OLD-CISCO-TCP-MIB

CISCO-TCP-MIB

OLD-CISCO-TS-MIB

To be decided

OLD-CISCO-VINES-MIB

CISCO-VINES-MIB

OLD-CISCO-XNS-MIB

To be decided

Note Cisco Management Information Base (MIB) User Quick Reference is no longer published. If you have an account with CCO, you can find the current list of MIBs supported by Cisco. To reach the Cisco Network Management Toolkit, go to CCO, press Login, and click to Software Center: Network Mgmt Products: Cisco Network Management Toolkit: Cisco MIB.

Caveats

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.

This section only contains open and resolved caveats for the current Cisco IOS maintenance release.

All caveats in Cisco IOS Release 12.1 and Cisco IOS Release 12.1 T are also in Cisco IOS Release 12.1(2)XH.

For information on caveats in Cisco IOS Release 12.1, see Caveats for Cisco IOS Release 12.1.

For information on caveats in Cisco IOS Release 12.1 T, see Caveats for Cisco IOS Release 12.1 T, which lists severity 1 and 2 caveats and is located on CCO and the Documentation CD-ROM.

Note If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. To reach Bug Navigator II, go to CCO and press Login. Then go to Software Center: Cisco IOS Software: Cisco Bugtool Navigator II. Another option is to go to http://www.cisco.com/support/bugtools.

Open Caveats---Cisco IOS Release 12.1(2)XH

This section describes possibly unexpected behavior by Cisco IOS Release 12.1(2)XH and describes only severity 1 and 2 caveats:

If hardware compression is enabled on a Cisco 2600 series with an AIM compression card (AIM-COMPR) with a Fast Ethernet network module (NM-2W) compression will fail. The workaround is to use software compression.
With multicast voice and fast or Cisco Express Forwarding (CEF) switching turned on, compression will corrupt the packets and cause loss of voice path.
The workarounds are:

Related Documentation

The following sections describe the documentation available for the Cisco 2600 series. These documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents.

Documentation is available as printed manuals or electronic documents, except for feature modules, which are available online on CCO  and the Documentation CD-ROM.

Use these release notes with these documents:

Release-Specific Documents

The following documents are specific to Cisco IOS Release 12.1 and are located on CCO  and the Documentation CD-ROM:

On CCO  at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Cross-Platform Release Notes
Technical Documents
As a supplement to the caveats listed in "Caveats" in these release notes, see Caveats for Cisco  IOS Release 12.1 and Caveats for Cisco  IOS Release 12.1 T, which contain caveats applicable to all platforms for all maintenance releases of Cisco IOS Release 12.1 and Cisco IOS Release 12.1 T.
On CCO  at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Caveats
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Caveats

Platform-Specific Documents

These documents are available for the Cisco 2600 on CCO and the Documentation CD-ROM:

On CCO, beginning under the Service & Support heading:

Technical Documents: Documentation Home Page: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers

On the Documentation CD-ROM at:

Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers

Feature Modules

Feature modules describe new features supported by Cisco IOS Release 12.1(2)XH and are updates to the Cisco IOS documentation set. A feature module consists of a brief overview of the feature, benefits, configuration tasks, and a command reference. As updates, the feature modules are available online only. Feature module information is incorporated in the next printing of the Cisco IOS documentation set.

On CCO  at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation

On the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation

Cisco IOS Software Documentation Set

The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents that are shipped with your order in electronic form on the Documentation CD-ROM---unless you specifically ordered the printed versions.

Documentation Modules

Each module in the Cisco IOS documentation set consists of two books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, Cisco IOS software functionality, and contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference.

On CCO  and the Documentation CD-ROM, two master hot-linked documents provide information for the Cisco IOS software documentation set.

On CCO  at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References

On the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References

Cisco IOS Release 12.1 Documentation Set

Table 6 describes the contents of the Cisco IOS Release 12.1 software documentation set, which is available in electronic form and in printed form if ordered.

Note You can find the most current Cisco IOS documentation on CCO  and the Documentation CD-ROM. These electronic documents may contain updates and modifications made after the hard-copy documents were printed.

On CCO  at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1

On the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1


Table 6: Cisco IOS Software Release 12.1 Documentation Set
Books Major Topics

  • Cisco IOS Configuration Fundamentals Configuration Guide

  • Cisco IOS Configuration Fundamentals Command Reference

Cisco IOS User Interfaces
Cisco IOS File Management
Cisco IOS System Management

  • Cisco IOS Bridging and IBM Networking Configuration Guide

  • Cisco IOS Bridging and IBM Networking Command Reference, Volume I

  • Cisco IOS Bridging and IBM Networking Command Reference, Volume II

Using Cisco IOS Software
Overview of SNA Internetworking
Bridging
IBM Networking

  • Cisco IOS Dial Services Configuration Guide: Terminal Services

  • Cisco IOS Dial Services Configuration Guide: Network Services

  • Cisco IOS Dial Services Command Reference

Preparing for Dial Access
Modem Configuration and Management
ISDN and Signaling Configuration
PPP Configuration
Dial-on-Demand Routing Configuration
Dial-Backup Configuration
Terminal Service Configuration
Large-Scale Dial Solutions
Cost-Control Solutions
Virtual Private Networks
X.25 on ISDN Solutions
Telco Solutions
Dial-Related Addressing Services
Interworking Dial Access Scenarios

  • Cisco IOS Interface Configuration Guide

  • Cisco IOS Interface Command Reference

Interface Configuration Overview
Configuring LAN Interfaces
Configuring Serial Interfaces
Configuring Logical Interfaces

  • Cisco IOS IP and IP Routing Configuration Guide

  • Cisco IOS IP and IP Routing Command Reference

IP Addressing and Services
IP Routing Protocols
IP Multicast

  • Cisco IOS AppleTalk and Novell IPX Configuration Guide

  • Cisco IOS AppleTalk and Novell IPX Command Reference

AppleTalk and Novell IPX Overview
Configuring AppleTalk
Configuring Novell IPX

  • Cisco IOS Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS Configuration Guide

  • Cisco IOS Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS Command Reference

Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS Overview
Configuring Apollo Domain
Configuring Banyan VINES
Configuring DECnet
Configuring ISO CLNS
Configuring XNS

  • Cisco IOS Multiservice Applications Configuration Guide

  • Cisco IOS Multiservice Applications Command Reference

Multiservice Applications Overview
Voice
Video
Broadband

  • Cisco IOS Quality of Service Solutions Configuration Guide

  • Cisco IOS Quality of Service Solutions Command Reference

Quality of Service Overview
Classification
Congestion Management
Congestion Avoidance
Policing and Shaping
Signaling
Link Efficiency Mechanisms
Quality of Service Solutions

  • Cisco IOS Security Configuration Guide

  • Cisco IOS Security Command Reference

Security Overview
Authentication, Authorization, and Accounting (AAA)
Security Server Protocols
Traffic Filtering and Firewalls
IP Security and Encryption
Other Security Features

  • Cisco IOS Switching Services Configuration Guide

  • Cisco IOS Switching Services Command Reference

Cisco IOS Switching Services Overview
Cisco IOS Switching Paths
Cisco Express Forwarding
NetFlow Switching
MPLS Switching
Multilayer Switching
Multicast Distributed Switching
Virtual LANs
LAN Emulation

  • Cisco IOS Wide-Area Networking Configuration Guide

  • Cisco IOS Wide-Area Networking Command Reference

Wide-Area Networking Overview
Configuring ATM
Configuring Frame Relay
Configuring Frame Relay-ATM Interworking
Configuring SMDS
Configuring X.25 and LAPB

  • Cisco IOS Configuration Guide Master Index

  • Cisco IOS Command Reference Master Index

  • Cisco IOS Debug Command Reference

  • Cisco IOS Dial Services Quick Configuration Guide

  • New Features in 12.1-Based Limited Lifetime Releases

  • New Features in Release 12.1 T

  • Release Notes (Release note and caveat documentation for 12.1-based releases and various platforms)
Note Cisco Management Information Base (MIB) User Quick Reference is no longer published. If you have an account with CCO, you can find the current list of MIBs supported by Cisco. To reach the Cisco Network Management Toolkit, go to CC, press Login, and click to Software Center: Network Mgmt Products: Cisco Network Management Toolkit: Cisco MIB.

Obtaining Documentation

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/cgi-bin/subcat/kaojump.cgi.

Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).

Obtaining Technical Assistance

Cisco provides Cisco Connection Online (CCO)  as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed documents, or by sending mail to Cisco.

Cisco Connection Online

Cisco continues to revolutionize how business is done on the Internet. Cisco Connection Online is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.

CCO's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through CCO, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.

Customers and partners can self-register on CCO to obtain additional personalized information and services. Registered users may order products, check on the status of an order and view benefits specific to their relationships with Cisco.

You can access CCO  in the following ways:

You can e-mail questions about using CCO to cco-team@cisco.com.

Technical Assistance Center

The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.

To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.

To contact by e-mail, use one of the following:

Language E-mail Address

English

tac@cisco.com

Hanzi (Chinese)

chinese-tac@cisco.com

Kanji (Japanese)

japan-tac@cisco.com

Hangul (Korean)

korea-tac@cisco.com

Spanish

tac@cisco.com

Thai

thai-tac@cisco.com

In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.

Software Configuration Tips on the Cisco Technical Assistance Center Home Page

If you have a CCO log-in account, you can access the following URL, which contains links and tips on configuring your Cisco products:

http://www.cisco.com/kobayashi/technotes/serv_tips.shtml

This URL is subject to change without notice. If it changes, point your Web browser to CCO, press Login, and click on this path: Technical Assistance Center: Technical Tips.

The following sections are provided from the Technical Tips page:

Documentation Feedback

If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:

Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate and value your comments.





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Posted: Wed Jun 21 16:54:05 PDT 2000
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