Cisco VG248 - Gateway Software Configuration Manual
Cisco VG248 Analog Phone Gateway
Software Configuration Guide
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Text Part Number: OL-1209-02
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Cisco VG248 Analog Phone Gateway Sof tware Configuration Guid e
Copyright © 2001-2002, Cisco Syste ms, Inc.
All rights reserved.
About this Guide xi
Overview xi
Audience xi
Objectives xi
Organization xii
Related Documentation xii
Obtaining Documentation xiii
World Wide Web xiii
Documentation CD-ROM xiii
CONTENTS
Ordering Documentation xiii
Documentation Feedback xiv
Obtaining Technical Assistance xiv
Cisco.com xiv
Technical Assistance Center xv
Contacting TAC by Using the Cisco TAC Website xv
Contacting TAC by Telephone xvi
Overview 1-1
Understanding How the VG248 Integrates with the Cisco IP Telephony
Network 1-2
Understanding How the VG248 Supports Telephony Features 1-3
Supported Telephony Features 1-3
Understanding Voice-Mail Message Indicators 1-4
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Contents
Understanding Call Control Modes 1-4
Basic 1-5
Standard 1-5
Feature 1-5
Understanding Caller ID Support 1-7
Supported Analog Devices 1-8
Analog Phones 1-8
Speakerphones 1-9
Private Line Automatic Ringdown Phones 1-9
Fax Machines 1-9
Modems 1-9
Supported Protocols 1-10
Data and Voice Protocols 1-10
Network Management Protocols 1-10
Understanding SNMP Support 1-11
Understanding Trap Support 1-11
Understanding Supported MIBs 1-11
Getting Started with the VG248 2-1
Accessing Configuration Options 2-1
Using the Console Port 2-2
Using Telnet 2-2
Displaying the Main Menu 2-3
Restarting the VG248 2-4
Configuring Network Settings 2-4
Configuring Ethernet 2-5
Using DHCP 2-5
Renewing IP Address from DHCP 2-6
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Setting the Host Name 2-7
Setting the IP Address 2-7
Setting the Subnet Mask 2-8
Setting the Default Router 2-8
Setting the DNS Server 2-9
Setting the Domain Name 2-9
Enabling CDP 2-10
Setting DSCP Quality of Service Values 2-10
Configuring Passwords 2-11
Configuring the Login Password 2-11
Configuring the Enable Password 2-12
Configuring SNMP Settings 2-12
Contents
Setting Community Strings 2-12
Configuring Contact Information 2-13
Configuring Contact Name 2-13
Configuring System Name 2-14
Configuring Location 2-14
Configuring Trap Settings 2-14
Enabling Authentication Traps 2-15
Configuring Trap Receiver Stations 2-15
Configuring the Telephony Settings on the VG248 3-1
Identifying the Cisco CallManager TFTP Server 3-2
Changing the Cisco CallManager Device Name 3-2
Disabling Cisco Fax Relay 3-3
Reverting to Previous Configuration 3-3
Choosing the Call Control Mode 3-4
Assigning Feature Codes 3-4
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Contents
Identifying the Country Code for VG248 3-6
Changing the Hook Flash Timer for Analog Phones 3-7
Setting the Port Enable Policy 3-7
Configuring Port Parameters 3-9
Enabling a Specific Port 3-9
Enabling Caller ID 3-11
Choosing Message Waiting Indicator Type 3-11
Enabling Disconnect Supervision 3-12
Setting the Output Gain 3-13
Setting the Input Gain 3-14
Configuring Analog Phones Using Cisco CallManager 4-1
Overview 4-1
Adding the VG248 to Cisco CallManager 4-2
Using Auto-Registration 4-2
Manually Adding the VG248 4-3
Configuring the VG248 Analog Ports 4-3
Integrating Cisco CallManager with Voice Mail Systems Using SMDI 5-1
Overview 5-2
Choosing a Configuration Option 5-4
Basic Configuration 5-5
Chained Configuration 5-6
Multiplexing Configuration 5-8
Connecting the SMDI Links to the VG248 5-12
Configuring VG248 SMDI Ports in Cisco CallManager 5-13
Configuring Voice Mail Parameters in Cisco CallManager 5-13
Adding the MWI Port to Cisco CallManager 5-14
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Adding and Configuring Voice Mail Ports in Cisco CallManager 5-16
Configuring End-User Phones 5-18
Configuring SMDI Settings on the VG248 5-19
Identifying the Pilot Directory Number 5-20
Assigning Number of SMDI Ports 5-21
Identifying the First Voice Mail Port Number 5-21
Setting SMDI Number Length 5-22
Allowing SMDI Number to be Truncated 5-23
Setting the SMDI Number Format 5-23
Assigning the Message Desk Number 5-24
Forwarding MWIs to Cisco CallManager 5-24
Forwarding MWIs to Async 2 5-25
Forwarding INV Responses to Async 1 5-26
Contents
Identifying the Directory Number for Setting MWI on
Cisco CallManager 5-26
Identifying the Directory Number for Clearing MWI on
Cisco CallManager 5-27
Entering a Keep Alive Number 5-27
Configuring Disconnect Notification 5-28
Verifying and Troubleshooting the SMDI Connection 5-28
Checking Link Status 5-29
Verifying Port Status and Displaying Port Statistics 5-29
Validating the SMDI Configuration on the VG248 Devices 5-30
Suspending SMDI Port Activity 5-31
Troubleshooting SMDI Errors and Warnings 5-32
Troubleshooting the VG248 6-1
Troubleshooting Hardware Errors 6-1
Displaying Hardware Status 6-2
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Contents
Identifying Fan Faults 6-2
Identifying Power Supply Faults 6-3
Monitoring Internal Operating Temperature 6-3
Connecting Too Many Phones to the VG248 6-4
Resolving Additional Hardware Errors 6-4
Troubleshooting Software Errors 6-5
Resolving Network and System Errors 6-5
Resolving Analog Errors 6-10
Resolving Cisco CallManager Errors 6-11
Upgrading Software Images 6-13
Upgrading the Main Image 6-13
Upgrading the Boot Loader 6-14
Resolving an Incomplete Upgrade 6-15
Verifying Network Connectivity 6-15
Displaying Status and Configuration Settings 6-16
Displaying System Status 6-16
Displaying Network Statistics 6-17
Displaying Port Status 6-17
Displaying Detailed Port Status 6-19
Displaying Port Statistics 6-20
Displaying Current Configuration 6-21
Displaying Software Version 6-21
Monitoring System Status Remotely 6-22
Working with the Event Log 6-22
Identifying a Syslog Server 6-23
Enabling Syslog 6-23
Identifying a Specific Syslog Server 6-23
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INDEX
Contents
Selecting Logging Levels and Logged Ports 6-24
Displaying Recent Messages 6-24
Understanding Sub-Systems on the VG248 6-25
Resolving Incorrect Date and Time in Event Log 6-26
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Contents
Cisco VG248 Analog Phone Gateway Software Configuration Guide
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Overview
About this Guide
The Cisco VG24 8 Ana log Pho ne Gate way Softwar e Conf igur ation Gu ide pro vides
the information you need to configure and manage the Cisco VG248 Analog
Phone Gateway (VG248) on your network.
Audience
Objectives
Network engineers, system administrators, and telecom engineers should review
this guid e for info rmati on ab out con f ig uring and usi ng th e VG248 in the netwo rk.
The tasks described in this guide are considered to be administration-level tasks.
Because of the close interaction of the VG248 with Cisco CallManager and
analog te le ph on y sy stems, th ese tasks r eq u ir e t ha t y o u ar e fa m il ia r with these
systems as well.
This guide provides the required steps to configure and manage the VG248. You
must us e this guide in conjunction with the Cisco VG24 8 Analog Phone Gateway
Hardware I nstalla ti on Gu id e to get the VG248 up and running on your network.
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About this Guide
Organization
Becaus e of the comple xity of an IP teleph ony n etwork , this guide do es not prov ide
detailed information for required procedures performed on other Cisco or
third-party devices. Refer to the documentation provided with these systems for
insta lla tion an d co n fig ur at io n instr uction s.
Organization
Table 1 pr ovides an over view of th e o rganiza t io n of t hi s g uide.
Table 1 Cisco VG248 Analog Phone Gateway Software Configuration Guide Organization
Chapter Description
Chapter 1, “Overview” Provid es an ove rvi ew o f softw ar e f ea tu r es an d
how they are implemented on the VG248.
Chapter 2, “Getting Started with the VG248” Describes the basic network settings you need to
configure on the VG248.
Chapt e r 3, “Configur ing th e Teleph o ny S ett ings
on the VG248”
Chapter 4, “Configuring Analog Phones Using
Cisco C al lManager ”
Chapt er 5, “Integ ra tin g C is co CallM an ag er w it h
Voi ce Mail Systems U sing S MDI”
Chapter 6, “Troubleshooting the VG248” Provides troubleshooting tips for the VG248.
Includes the procedures for configuring the
tele ph ony se tt ings on the VG2 48 .
Describes necessary steps i n Cisco CallManager
for adding and configuring the VG248 ports.
Provides an overview of SMDI support,
configuration options, instructions for
configuring, and troubleshooting tips.
Related Documentation
For information about Cisco CallManager and additional information about the
VG248 , r ef er t o these public at ions:
• Cisco VG248 Analog Phone Gateway Hardware Installation Guide
• Cisco VG248 Analog Phone Gateway Release Notes
• Cisco Cal lManager Ad m in i stration Gu id e
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About this Guide
Obtaining Documentation
The following sections provide sources for obtaining documentation from Cisco
Systems.
World Wide Web
You can access the most current Cisco documentation on the W o rld Wide Web at
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553-NETS(6387).
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Obtaining Technical Assistance
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About this Guide
Obtaining Technical Assistance
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Cisco VG248 Analog Phone Gateway Software Configuration Guide
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About this Guide
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Contacting TAC by Using the Cisco TAC Website
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http:/ /w ww.cisco.com/ta c/c a se o p e n
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xv
Obtaining Technical Assistance
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About this Guide
Cisco VG248 Analog Phone Gateway Software Configuration Guide
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CHAPTER
1
Overview
The Cisco VG248 Analog Phone Gateway (VG248) enables you to integrate
analog te lephones, mod em s, and fax m a ch in es w it h th e C is c o CallM a na ger IP
telephony system. You can also integrate legacy voice mail and PBX systems with
Cisco CallM an ag er u sin g S imp li fied M ess a ge D es k Int er fac e ( SMDI).
The following topics provide an overview of the supported features and analog
devices and describe the supported data and voice protocols:
• Understanding How the VG248 Integrates with the Cisco IP Telephony
Network, page 1-2
• Understanding How the VG248 Supports Telephony Features, page 1-3
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• Supported Analog Devices, page 1-8
• Supported Protocols, page 1-10
For details on using SMDI to integrate your existing voice mail systems with
Cisco CallM an ag er see the C h ap ter 5, “I nt egr ati ng Cisco CallMa nager with
Voic e M ai l Sy st em s U sing SM D I .”
Cisco VG248 Analog Phone Gateway Software Configuration Guide
1-1
Chapter 1 Overview
Understanding How the VG248 Integrates with the Cisco IP Telephony Network
Understanding How the VG248 Integrates with the
Cisco IP Telephony Network
The Cisco VG248 is a high-density gateway for using analog phones, fax
machines, modems, and speakerphones within the Cisco IP telephony network
(see Figure 1-1) . The Cis co VG248 off ers 48 f ully-feat ured ana log phone lines to
be used as extensi on s t o th e C is c o CallMan ag er s y ste m i n a co mp act 19 -inc h
rack-mount chassis.
Figure 1-1 VG248 Integrated in the Cisco IP Telephony Network
PSTN
Cisco CallManager
cluster
M
M
Gateway
V
IP IP IP
IP phones
VG248
Fax
Modem
Analog
phones
63891
Cisco VG248 Analog Phone Gateway Software Configuration Guide
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Chapter 1 Overview
Understanding How the VG248 Supports Telephony Features
Understanding How the VG248 Supports Telephony
Features
Review t he fol lowing s e c t io ns to und e r stand w hich tele ph o ny fea tu r e s are
supported by the VG248 and to understand how they are implemented:
• Supported Telephony Features, page 1-3
• Understanding Voice-Mail Message Indicators, page 1-4
• Understanding Call Control Modes, page 1-4
• Understanding Caller ID Support, page 1-7
Supported Telephony Features
The VG248 supports the following features:
• Call Trans f er ( s u pervised a n d blind)
• Conference
• Call Waiting (w i th callin g p a r t y I D d is p lay)
• Hold (including switch between parties on hold)
• Call Fo rwar d A ll
• Send All Ca lls to Voi ce Mail
• Pickup
• Call Voice M ai l
• Spee d D ial (m axim um of 9 s p e e d dial s)
• Last Nu mb er Re di al
• Caller ID
To under s tan d h ow user s access an d us e th ese featur e s , see Table 1-1.
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Understanding How the VG248 Supports Telephony Features
Understanding Voice-Mail Message Indicators
The VG248 can receive message-waiting indicator (MWI) information from
Cisco CallM an ag er an d s en d it to an al og p h on es. The VG2 4 8 sen ds MWI
messages using any of the following methods:
• Playing stutter dial tone when a user picks up the phone
• Illumi nating th e MW I lamp on th e ph o ne
• Using caller ID m e ch anism to se n d in f orm ation to t he L C D sc re e n on the
phone
Yo u can enabl e or disable any of these opti ons. See th e “Choosing Message
Waiting Indicator Type” section on page 3-11 for deta ils .
Understanding Call Control Modes
Chapter 1 Overview
The VG248 supports different call control modes, which indicate how users
access an d use t he s up por ted tele ph o ny feat ur es. You can cho os e th e call con tr o l
mode appropriate to the specific needs of your users and the abilities of your
analog devices. The supported call control modes include:
• Basic
• Standard
• Feature
T o und erst and t he dif fe re nce s amon g th e thre e mo des, k e ep in mind t he fol l o wing
tips:
• The three modes differ in how they support transfer and conference.
• All modes support call waiting, and you can disable it on a per port basis
using Cisco CallManager.
• All mo de s su pp o rt feat ur e co de s f or s p eed d ia l, re di al, call for wa rd an d
pickup, and you can define or disable them on a per device basis.
• Users can access features using the hook flash, 0-9, *, or # buttons, depending
on how you have configured the feature codes.
• You cannot use a double flash hook.
See the “Choosing the Call Control Mode” section on page 3-4 for details about
setting the call control mode on the VG248.
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Chapter 1 Overview
Basic
Standard
Understanding How the VG248 Supports Telephony Features
This m od e prov id es t he mos t b asic ph on e in ter fa ce with no cal l t r an s fe r or
conferen ce f eat ures . B as ic mo de m i ght work b est f or f ax m ac hi ne s o r mo de m s.
See Table 1-1 for details about how the telephony features are accessed in basic
mode.
Standard is the default telephony mode, and it provides standard Bellcore
features, s uc h as u sed i n N o r th A m eri ca.
Users use the flash button or hook flash to transfer, conference and hold calls,
with t he f ollowin g re qu ir ements :
• You cannot use a double hook flash to end a call.
Feature
• When putting calls on hold, the first call can be e ither incoming or outgoing.
• When tran sferring a c all or establishing c o nferences, the second call must be
outgoing.
Users al so us e f eat ure code s to ac tivate ot he r features i n stan d ar d mod e. See
Table 1-1 for details about how the telephony features are accessed in standard
mode.
For simple call s , th e fe atu r e mode i s indist in guishabl e f r om th e s t an da rd m od e.
While on calls, users use the flash button or hook flash to get a second dial tone
to dial a secon d pa rt y. However, users then mu s t en ter feature co d e s t o t r an sfe r
the call o r establish a confer en ce .
When usi ng feat ure m o de wi th tw o ca lls es tabl is hed, t he ho ok flas h cyc les ar oun d
four states:
1. First call connect ed
2. Feature code to n e
3. Second call conn ected
4. Feature code to n e
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Understanding How the VG248 Supports Telephony Features
These di fferen t s tat es enable y ou to keep both calls active and s w it ch b etw e en
them. Thus, unlike Standard mode you can keep both calls active for as long as
you want and freely switch between them.
T o transfer or conference, you need to enter the relevant feature code at one of the
feature t o nes (w h ic h ar e si m il ar to d ial tones exce pt y ou can only enter f eat ur e
codes r ath er t ha n be in g ab le to d ial a d i re cto ry numb er).
See Table 1-1 for details about how the telephony features are accessed in feature
mode
Table 1-1 Overview of Default Feature Access in Call Control Modes
Basic Standard Feature
SpeedDial SpeedDial SpeedDial
*1 *2 *1 *2 *1 *2
Chapter 1 Overview
*3 *4 *3 *4 *3 *4
*5 *6 *5 *6 *5 *6
*7 *8 *7 *8 *7 *8
*9 *9 *9
Call Voice Mail Call Voice Mail Call Voice Mail
*0 *0 *0
Last Number Redial Last Number Redial Last Number Redial
*# *# *#
Forward All to Voicemail Forward All to Voicemail Forward All to Voicemail
**0 **0 **0
Forward All
1
Forward All
1
Forward All
1
**1 number **1 number **1 number
Disable Forward All Disable Forward All Disable Forward All
**2 **2 **2
Pickup Pickup Pickup
**3 **3 **3
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Chapter 1 Overview
Understanding How the VG248 Supports Telephony Features
Table 1-1 Overview of Default Feature Access in Call Control Modes (continued)
Basic Standard Feature
Call Waiting Call Waiting Call Waiting
Hook f lash to a n s w er
and switch between
Hook f la s h to an sw er an d sw it ch
betwe en calls.
Hook flash to answer and switch
betwe e n cal ls.
calls .
Blind Transfer Blind Transfer
Call 1, hook flash, call 2, hang up. Call 1, hook flash, #2, call 2, hang up
Supervised Transfer Supervised Transfer
Call 1, hook flash, call 2, wait for
call 2 to be a nsw e r e d, hang u p
Conference Conference
Call 1, hook flash, call 2, hook
Call 1, hook flash, call 2, wait for call 2
to be answered, hook flash, #2
Call 1, ho ok f las h, c all 2, hook f la sh, #3
flash
Hang up Last Call
Call 1, ho ok f las h, c all 2, hook f la sh, #1
Hold
Call 1, ho o k fla s h, call 2; hoo k fl a sh to
toggle
1. When forward all is activated, users hear a distinctive dial tone to indicate that all incoming calls are currently being
forwar de d to a differ en t dir ectory num be r .
Understanding Caller ID Support
If you have activated caller ID on Cisco CallManager, the VG248 can collect that
informat io n and pa ss it on to an alog ph on es. You can d isable ca ll er I D on a per
port basis. This enables you to support caller ID on some analog phones and not
on others (see the “Enabling Caller ID” section on page 3-11 for details).
The VG248 supports the following caller ID standards:
• Bellco re G R- 3 0- CORE—North Am er ica
• ETS 300 648 and ETS 300 659-1—Europe (excluding the United Kingdom)
• British Telecom SIN227 and SIN 242—United Kingdom
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Supported Analog Devices
When a call ar r ives, th e VG 2 48 s en d s th e fo ll owing i nf o rm ati on :
• Time and date in form atio n
• Calling number up to 18 digits when available, otherwise the reason why
number i s u navaila bl e
• Callin g n ame up to 2 0 ch ar act er s w h en availab le
Supported Analog Devices
The VG248 has a maximum ringer equivalency number (REN) load of three (3)
analog devices per line (using a shared directory number), and only two of these
devices can be off-hook at any one time.
You should use analog devices designed to work in the country in which you are
using the VG248. For example, if you are using the VG248 in the United
Kingdom, you should use analog devices designed for use in that country.
Chapter 1 Overview
These s ections pr ovide an over view of the types of analog devices s up p or t e d by
the VG248:
Analog Phones
The V G248 s upp orts anal og phon e s and the st an dard t ele pho n y fea tur es a v ail a ble
on them .
• Analog Phones, page 1-8
• Speakerphones, page 1-9
• Private Line Automatic Ringdown Phones, page 1-9
• Fax Machines, page 1-9
• Modems, page 1-9
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Chapter 1 Overview
Speakerphones
The VG248 pe rforms line ec ho cancel lat ion, bu t it does not perfor m acoust ic echo
cancell ati on . S p ea ker p hones wi th bui lt -in ech o cance ll ati on su ch as the
Polycom-brand phones should work fine. However the voice quality might be
unsatisfactory when using a speakerphone that does not perform acoustic echo
cancell ati on i tself.
Private Line Automatic Ringdown Phones
A telephon e conf igur ed as a Pri va te Line Auto matic Rin gdo wn (PLAR) telepho ne
dials a pre-configured number when it goes off-hook. You cannot use PLAR
phones to dial any other numbers. Telephones in hotel lobbies and airports are
often configured in this way.
Supported Analog Devices
Fax Machines
Modems
Cisco CallManager release 3.0 and later can be configured to support the PLAR
phone fe atu re for a n IP pho ne or for an a nalo g tel ep hone c onnec ted to t he VG2 48.
The V G248 supp orts fax m achines in pass-through and Cisco fax relay modes. In
fax pass-through mode, the gateways do not distinguish a fax call from a voice
call. Cisco fax relay offers a more reliable way of transporting the fax data in
order to increase the data rate. However, the terminating gateway must also
support Cisco fax relay. If necessary, you can disable Cisco fax relay (see the
“Disabling Cisco Fax Relay” section on page 3-3 for details) .
The VG248 supports modems in pass-through mode.
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Supported Protocols
Supported Protocols
The VG248 supports several industry-standard and Cisco networking protocols
required for voice communication over an IP network. Additionally, the VG248
supports protocols required for remote network management.
These sections provide an overview of the protocols supported by the VG248:
• Data and Voice Protocols, page 1-10
• Network Management Protocols, page 1-10
Data and Voice Protocols
The VG248 supports the following data and voice communication protocols.
Chapter 1 Overview
• Internet Protocol (IP)—addresses and sends packets across the network.
• Inte r net Gr ou p Manage m e nt Pr ot ocol ( IG M P ) — u s ed to report multicast
group memberships
• Trivial File Transfer Protocol (TFTP)—allows you to transfer files over the
network.
• Hyper Text Trans f e r P r ot ocol ( H T TP ) — d e fi nes how m essages a re for matte d
and trans mitte d, and what acti ons Web servers and browsers s hould take in
respons e to va ri ous c omma n ds .
• File Transfer Protocol (FTP)—allows you to transfer files over the network.
• Dynam ic Hos t Con figurat ion P roto col (DH CP )—d ynam ica lly allo ca tes and
assi gn s an IP a ddres s to networ k devic es .
• Real-Time Transport Protocol (RTP)—enables transporting of real-time data,
such as inter a ctive voic e a n d v ideo over data networ ks.
• Skinny Client Control Protocol (SCCP)—enables communication between
the VG24 8 an d Ci sc o CallM an ag er.
Network Management Protocols
The VG248 supports Simple Network Management Protocol (SNMP) and
implements several industry-standard Management Information Bases (MIBs).
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Chapter 1 Overview
Understanding SNMP Support
The VG248 supports SNMP versions 1 and 2, enabling you to perform the
following commands:
• Get—Retrieve a specific node’s value.
• GetNext—Retrieve the first value present in the ordered tree whose node
succee ds th e o n e s p ec ifie d.
• GetBulk—Retrieve bounded number of values whose nodes succeed, in the
numer ica l orde rin g, the on e spe cified. GetBulk is a vailabl e only in SNMP v2.
• Set—S et a s pe cifi c valu e.
Understanding Trap Support
The VG248 generates the following general traps, as defined in RFC 1157:
Supported Protocols
• Cold st ar t—whe n the VG24 8 star ts up a nd o bt ai ns an IP ad dr ess
• Warm start—when the VG248 changes IP addresses
• Authe nt ic ation fa il ur e— w hen an invalid commu n ity string i s u s ed
Yo u mu st h ave se t at lea s t on e networ k m anage ment s tation in or der f or the
VG248 to generate traps. See the “Configuring Trap Settings” section on
page 2-1 4 for details.
Understanding Supported MIBs
The VG248 supports the following MIBs.
RFC 1213
RFC 1213 is the basi c MIB 2 specif i cat io n whic h indi cat es th e sta te of embe dd ed
interfaces and s tat ist ics fo r n etw o rk p r ot oc ol s .
The VG248 supports RFC 1213 with the following caveats:
• ifAdm in Stat u s f or t he Ethernet inte rface cann ot b e w ritten, an d i t i s fixe d at
“up”.
• ifSpeci ficfo r a ll in terface s r etu r ns as “ 0, 0” .
• atTable c an no t be w r itt en .
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Supported Protocols
Chapter 1 Overview
• No “ip***” values can be written.
• You cannot write to “tcpConnState” for an active TCP connection.
• The VG248 does not implement the External Gateway Protocol (EGP).
Interface MIB
This MIB is defin ed in RFC 1573 and e xtends the range of information availabl e
about a device's interfaces from that provided by the ifTable in RFC 1213. The
VG248 implements this MIB for its Ethernet interface and the 48 FXS interfaces.
However, the octet or packet count values are not available for the FXS interfaces
becaus e th ey a re not applic ab le to these inte rface typ es .
RMON
The VG248 implements the Ethernet Statistics group in Remote Monitoring
(RMON ), w it h th e ex cep ti on o f “Et he r St at sS tat us. ” This is fixed at “val id ” a nd
cannot be written.
Cisco CDP MIB
Cisco D is covery P ro t o co l (CD P ) is a m e thod t hat Cis co devices us e to advert is e
their presence and to discover information about other nearby devices. The
VG248 supports CDP and implements this MIB. You can enable or disable CDP
on the VG2 48 . S ee t h e “Ena bl in g CDP” section on pag e 2-10 for de tails .
Cisco Process MIB
This MIB describes the processes currently running on the device. However,
because the VG2 4 8 ru n s th r ead s, r ather than p rocesses, t he M I B i s impleme nt ed
with t he f ol low in g caveats:
• The amount of memory allocated is not recorded on a per-thread basis.
Therefore, cp m Pr oc Ex tM em Al lo ca ted a nd cp m Pr o cEx tMemFreed ar e
returned as 0.
• All threads run at the same priority. Therefore, every process
cpmProcExtPriority are returned as “normal.”
• It is not possi bl e t o cha ng e a proces s’s prior it y, so attempts to w r it e
“cpmPro cEx tPr io r it y” ar e un s uc cessf u l.
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Chapter 1 Overview
Supported Protocols
Cisco Memory Pool MIB
This MI B allo ws de tail ed info rmat ion to be retri e ved f or all m emory po ols p resen t
within a Cis co device. The VG 248 im pleme nt s th is MI B, b ut beca use al l dyn amic
memory ma nage ment use s a sin gle he ap, the re sult i ng t able has one ro w, which is
returned as “Processor”.
Cisco EnvMon MIB
“EnvMon” re fe r s to t he on - bo ar d enviro nm en tal mon ito r o n t h e VG2 4 8 th at
monito rs th e internal voltag e, power su pp ly, tem p er atu r e, a nd f an setting s.
The VG248 ro utin ely measur es the se val ues record ing th e informat ion in the row s
withi n th e different tables:
• ciscoEnvMonVoltageStatusTable—records voltage and power supply
readings
• ciscoEnvMonFanStatusTable—records fan status readings
• ciscoEnvMon Tempera tu reS tat usTable—re co rd s t em p er at ure settin gs
You can use this MIB to access these recorded values. Also, if the VG248 detects
readings beyond the acceptable limits, the device generates warning messages.
See the “Troub lesh oo ting H a r d ware Er r ors” s ection on page 6 - 1 fo r deta ils.
Cisco Voice Interface MIB
This C is co pr o pr ietary MIB (CISCO-VOICE-IF-MIB.my) allows access to
voice inter fa ce pa ra met er s su ch as g ai n val ue s an d ec ho ca nc ell ation stat us. The
VG248 implementation of this MIB provides read access only. You can configure
the gain values using the VG248 interface (see the “Se tti n g t h e O u tput G ai n”
section on page 3-13 and the “Setting the Input Gain” section on page 3-14 for
detai ls ) .
Cisco Analog Voice Interface MIB
This C is co pr o pr ietary MIB (CISCO-VOICE-ANALOG-IF-MIB.my) allows
access to in terface pa ram eter s related to the ana log po rts. The se param ete rs
include h ar d wa re iss u es s uc h as el ect r ica l imped an ce val ue an d r ing fr eq u en cy
and user factors such as whether an attach ed handset is currently on- or off-hook.
The electrical impedance value and ring frequency is determined by the country
code you set in the VG248 (see “Identifying the Country Code for VG248”
section on page 3-6 for details). You can modify the hook-flash timer using the
VG248 int er face ( s ee “Changing the Hook Flash Timer for Analog Phones”
section on page 3-7).
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Supported Protocols
Chapter 1 Overview
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