1. technology and computing
2. computer certification

Presentation
Title
Cisco Fax Server
Size
30PT
Integrating
T.38 Fax
in
Cisco Networks
Option
2: Live
Marco Brugge
[email protected]
International Solutions Consultant Strategic Alliances
ph. +31 (0)34 732 4223|
© 2007 Cisco Systems, Inc. All rights reserved.
fax: +31 (0)34 732 4286|
Cisco Confidential
mob. +31 (0)651 507 220 |
1
Integrating T.38 Fax in Cisco Networks
 Commercial Overview
 Overview of T.38 Support
 Building a Cisco Fax Server
 Ensuring a Reliable Fax Transport
 Redundancy and Failover
 Integrating Cisco Fax Servers
 Summary
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
2
Commercial Overview
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
3
Market Drivers and Trends for Fax

Market Drivers
–
Compliance
–
MFPs-multi-functional printers which can print, scan, and copy
• Replaces traditional fax machines

–
Transition to IP
–
Centralize fax operations
Fax Market Trends for next 3-5 years
–
Total fax server market is expected to grow at 8.2% CAGR
through 2010.
–
FoIP is expected to grow rapidly, posting a compound annual
growth rate (CAGR) over 50% during the period.
–
Up to 33% of fax server sales could be driven by MFPs.
Source: Davidson Consulting 2005-2010 Report
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
4
Why is 2007 Important?
 “Tipping Point” year for VoIP and FoIP
–Better understanding of business strategy, how and why to
implement, where to generate cost savings
–Better understanding of technology/interoperability, proven success
in implementing VoIP networks
–Strong sales and marketing push, increased resources allocated by
Cisco, Microsoft, Alcatel, others to sell VoIP networks
 Expected growth in FoIP market to double from 2006-2007
–Growing from $44 Million in 2006 to $94 Million in 2007
–50% CAGR over next 5 years  $245 Million by 2010
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
5
Where does FoIP fit?
 Bridges data and voice networks
 Unique Selling Points (USPs) within VoIP networks
–Ability to reduce/eliminate analog & ISDN lines  saves cost,
management overhead
–Quicker ROI for new IP equipment/VoIP solutions
–Integrates into IP network gateways
–“Boardless” solutions eliminate hardware/maintenance
 Component of Unified Communications/Presence/Unified
Messaging solutions
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
6
Where does FoIP start? With IP networks!
 Drive to eliminate “stand-alone” analog, ISDN lines
–Removes need to ATA boxes
 Traditional PABX migrating to IP PBX
 Consolidation of separate networks (voice, data, IP)
 Drive to simplify network and equipment management and
maintenance, merge IT and voice management functions
– Consistent fax solution available throughout network
 Reduce costs
–Long Distance/Toll charges, Network management, Maintenance, Support,
Personnel
 Drive towards centralization
–Equipment, Applications, Server environments, Data centers
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
7
Advantages of a Fax Server


For the Organization

For Administrators
Cost savings/Fast ROI
Easy to deploy and manage
Improved productivity
Reliability and control
Streamlined processes
Enhanced security
Shortened business cycle
Eliminates fax machines
Extends existing systems
Integration with network system
and applications
For the User
No waiting in line
at the fax machine

For Customers & Suppliers
Saves time
Improved customer service
Convenient and easy to use
Faster response times
Confirmation and audit trail
Reliable
Universal access
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
8
Common Faxing EnvironmentFaxes and MFPs
Considerations:
 5+ analog fax boards & Fax Kits @ $1000 per MFP
 9+ analog phone lines @ $30-45 per month
 Limited/no ability to integrate fax into VoIP network
 High number of analog/ISDN lines required
 High IT management costs and overhead
 No consolidated audit trail or history
 No image capture or retention
 No centralized control of fax activity
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
9
“Optimize Infrastructure" strategy
implemented in a VoIP network
5+ Networked MFPs + 1 fax server investment
Fully supports fax calls (FoIP) within VoIP networks
Increases ROI for VoIP networks –FoIP gives “quick
wins”
Increases ROI for networked MFPs
Eliminates stand-alone analog/ISDN lines
Reduces IT management costs and overhead
Centralized audit trails & history reports
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
10
What Does Cisco Fax Do?
 Automatic inbound routing
Routes inbound faxes to users’ desktop
or email
 Enables outbound desktop faxing
 Enables faxing from business
applications
 Integrates fax automation into MFPs
Information Workflow
Scan
MFP
Outbound
FAX
Inbound
FAX
 Web access and bi-directional SMS
support
 Tight integration with Microsoft
Exchange and IBM Lotus Notes
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
email
desktop
business
applications
11
Cisco Fax Server UM Deployment Scenario
Multi-Function
Document
Device
SIP/H323/MGCP
Web
Client
Email
Client
T38
T38
Cisco Call
Manager
Cisco Fax
Server
Messaging
Server
Cisco Unity
Server

Common message store used by Fax
Server and Unity messaging server

Faxes can be composed and sent
via desktop applications

Users can receive faxes through
Outlook/Domino client or via web client

Microsoft 2003 Standard and
Enterprise Servers Certifications
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
12
How to find opportunities
Look for:

Fax machines, Printers, and Multi-function devices (MFPs)

Preprinted forms
Ask:

Do you need to copy or store faxes for regulatory or compliancy requirements?

Do you need secure and confidential document delivery methods?

How is fax used in your network and who is using it?

Do you have “unstructured paper” that needs an on-ramp into the network?
Communicate:

Remove legacy network (stand-alone analog, ISDN lines, ATA boxes)

Remove legacy equipment (fax machines) & increase value of MFPs

Increase ROI for VoIP network  FoIP delivers “quick wins”

Integrate fax with existing network systems and applications
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
13
Benefits of Cisco Fax Server Solution

Embedded into Cisco-powered network solutions
–
No third-party software required  single Cisco solution for customer
–
Empowers Unified Communications and Unity solutions by capturing fax
communication
–
Key component of building a IPCC solution
–
Management and support provided by Cisco TAC

Reduces or eliminates analog, ISDN fax lines & ATA boxes

Integrates into multi-function printers, making them network enabled
–

MFP Modules for HP, Xerox, Sharp, Konica Minolta, Canon (Q3)
Integration into E-mail, ERP & CRM Applications
–
Modules for Exchange, Notes, Oracle, SAP, others
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
14
Overview of T.38
Support
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
15
Fax Support in Cisco Gateways
 Cisco gateways can handle faxes in a few different
ways
 Fax Passthrough
(Real-time)
 Store and Forward
(T.37)
 Fax passed using
G.711 codec with
optional upspeed
from other voice
codecs
 Both onramp and
offramp supported
for email/fax
conversion
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
 Fax Relay: Based on
T.38 protocol
(Real-time)
 Fax is demodulated
and streamed to the
other gateway using a
fax relay protocol
16
T.38 Fax Relay in Cisco Gateways
 T.38 is the de facto standard for all fax relay
implementations today
 All of the current Cisco IOS voice gateways support
T.38 fax relay using the H.323, SIP, and MGCP
protocols
 T.38 must be explicitly configured on Cisco voice
products
 Only the 1998 Version of T.38 with UDPTL
encapsulation is supported
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
17
T.38 and Cisco
VoIP
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
18
Cisco VoIP with FoIP
Headquarters
 A fax server solution can
be easily deployed on top
of an existing Cisco VoIP
infrastructure.
 The T.38 fax traffic can
use the same QOS
prioritization policies
designed for VoIP to
ensure error-free faxes.
IP
 Rule of thumb - if VoIP
works between two
locations, then FoIP will
work as well.
Branch 1
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
Branch 2
Branch 3
Branch 4
19
Technical Overview
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
20
The Technical Aspects

TR1034 - IP enabled & SR 140
TR1034
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
SR140
21
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
22
Cisco Fax Server
TR1034 T.38 Configuration
Remote Access
Cisco Fax
Server
E1
Sip
Brooktrout
TR1034
T38 Card
RTP
E1/FXS
||||
SIP
Router
(T.38dial-peer points
at Rightfax Network
Card)
RTP
||||
RightFax Network
Interface

When operating in T.38 mode the Cisco Fax Server uses two
network connections

SIP and Application access on MCS Network Interface

RTP/Media is sent to Brooktrout Ethernet Interface
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
23
IP Flows with SR140 and the NIC
1. CFS places outbound call;
Cantata layer uses IP Call
Control stack which uses the
NIC Ethernet port
2. CFS sends fax; Cantata layer
hands fax to T.30 and then T.38
Fax engine which uses the NIC
Ethernet port
Network switchgateway
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
SR140
LICENSE
IP Call
Control
T.30
T.38
NIC
24
SR140 Features

“Virtual board” - emulates a TR1034
in IP mode

Flexible Line of host-based software
2, 4, 8, 12, 24, 48 and 60 channels

Uses ITU standard T.38 protocol

Uses minimal amount of server
processing power

Supports SIP and H.323 IP call
control protocols
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
25
SR140 – CPU load
 Processor load for SR140 channels on
the following system:
Pentium 4 / 2.66 GHz
512 MB PC2100 DDR SDRAM memory
8
Channels
30
Channels
Pentium 4 – 3.0 GHz
1%
3%
7%
13%
Dual Xeon 3.4 GHz
1%
2%
4%
5%
Processor
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
60
120
Channels Channels
26
Inter-Working with Cisco
•
Inter-working with Cisco gateway (GW)
•
Inter-working with Cisco Unified Call Manager
•
Multiple Gateways
•
Redundancy and Failover
•
Inter-Working with CGW – Troubleshooting
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
27
Inter-Working with Cisco Gateway

tested for SIP and H.323 with:
Router family
Specific device
2600 Series
2621XM, 2651XM 12.3(16)
2800 Series
2851, 2821
12.4(3b), 12.3(8)T5
3700 Series
3745
12.3(11)T,12.3(14)T3
3800 Series
3845
12.4(4)T1
1700 Series
1751
12.3, 12.3.16
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
IOS tested
28
Inter-Working with CGW - Topology
FAX
Fax dial-peer
FAX E1
,
VOICE,
E1
SIP/H323/T38
SR140
GW
VOICE
CM
MGCP
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
29
Inter-Working with CGW - Topology
FAX
E1
Fax SIP/H323 dialSIP/H323/T38
peer
H323 dialpeer
VOICE
H323
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
SR140
CM
30
Inter-Working with CGW - Topology
Cisco Fax Relay or
T38
VOICE
slave
FAX
MGCP
,
FAX
E1
CM
FAX, MGCP
VOICE,
master
FAX
TR1034 E1
E1 PRI
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
31
Inter-Working with CGW - Topology
FAX
VOICE
slave
MGCP
,FAX
CM
FAX, MGCP
Dedicated
GW
E1
master
VOICE,
FAX
E1 PRI
Cisco Fax Relay or
T38
TR1034 E1
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
32
Integration with CallManager
 Different versions of CallManager offer varying
amounts of support for T.38 fax. Only the latest version
6.0 provides T.38 support for H.323, SIP, and MGCP.
T.38 Signaling Protocol Support Cisco Unified CM
Software Release
H.323 Support for T.38
4.1(1), 4.2(3),
5.0(1), and
6.0(1)
H.323 and MGCP Support for T.38 4.2(3) and
6.0(1)
H.323 and SIP Support for T.38 5.0(1) and
6.0(1)
H.323, SIP, and MGCP Support
6.0(1)
for T.38
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
33
Cisco Fax Server talks to CUCM
CM
SIP
> 5.0.4
SIP
> 6.0.1
PSTN
Call being processed (RTP)
GW
CFS
• Set up route patterns in the call manager and
dial-peers in the GW to route the calls
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
34
Cisco Fax Server talks to CUCM
CM
H323
H323
4.x
5.X
6.x
PSTN
Call being processed (RTP)
GW
CFS
• Set up route patterns in the call manager to
route the calls
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
35
Cisco Fax Server talks to CUCM
CM
MGCP
SIP
> 6.0.1
PSTN
Call being processed (RTP)
GW
CFS
• Set up route patterns in the call manager to
route the calls
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
36
Cisco Fax Server talks to CUCM
CM
MGCP
H323
> 4.2.3
> 6.0.1
PSTN
GW
Call being processed (RTP)
CFS
• Set up route patterns in the call manager to
route the calls
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
37
Ensuring a
Reliable Fax
Transport (QOS)
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
38
Network Factors Affecting T.38 Faxing
 Packet Loss - the amount of packets that are
unsuccessful in arriving at the destination.
 Jitter - the measure of the variability over time of the
latency across a network.
 Delay or Latency - the amount of time it takes a packet
to travel from source to destination.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
39
Packet Loss
 Fax calls are generally more susceptible to packet loss
than voice calls.
 Ideally no packet loss should occur during a T.38 call.
 For networks where packet loss is a problem then
multiple layers of redundancy are available for T.38.
 Enabling T.38 redundancy has the effect of more
bandwidth being consumed per call.
T.38 Redundancy
Cisco T.38 Bandwidth Consumption
Fax
Server
Cisco
gateway
2
3
1
2
1
T.38 Packets with Redundancy Level 1
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
High-speed
Bandwidth Consumed
Redundancy Level (Approximate)
0
25 kbps
1
41 kbps
2
57 kbps
40
Jitter
 Cisco voice gateways handle jitter through playout
buffers with a default setting of 300 ms.
 With playout buffers this deep, only excessive jitter (>
300 ms) is a problem for T.38 on Cisco gateways.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
41
Delay
 Delay is not as impacting to FoIP compared to VoIP.
 As long as the delay as constant without excessive
jitter, then T.38 fax calls have been known to handle
network delays of 1 second or more.
 However, as a best practice it is still recommended to
minimize network delays as much as reasonably
possible. Enough delay can cause FoIP calls to fail.
Multiple IP and PSTN hops are
prime sources of additional delay
PSTN
IP
© 2007 Cisco Systems, Inc. All rights reserved.
PSTN
Cisco Confidential
Satellite links
cause large
amounts of delay
IP
42
QOS Policy for FoIP
 A QOS policy that prioritizes FoIP traffic will minimize
packet loss, jitter, and delay.
 QOS policies for FoIP are configured on Cisco
gateways commonly using LLQ (Low Latency Queuing)
Layer 3 Queuing Subsystem
Low Latency Queuing
Police
PQ FoIP
PQ VC
Layer 2 Queuing Subsystem
Link Fragmentation
and Interleave
PQ
Interleave
VoIP-Cntrl
Packets
In
MC-Data
CBWFQ
Fragment
TX
Ring
Packets
Out
DLSW
WFQ
Default
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
43
Redundancy and
Failover
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
44
Cisco SRST Description
 Business resiliency through redundant, localized call
processing
 Intelligent and automatic failover configuration--no
manual IT or telecom intervention is required
 Centralized IP telephony configuration and
management
 Investment protection and ease of migration
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
45
CISCO SURVIVABLE REMOTE SITE TELEPHONY
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
46
RightFax Shared Services Module
GW’s using SRST (mini CUCM) when
connection is lost with CUCM
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
47
Redundancy and Failover (Part 1)
 With the H.323 or SIP call
control protocols, gateways
can be honed to multiple
fax servers with varying
levels of priority.
 In a normal scenario,
incoming fax calls are
simply routed to a local fax
server.
 For example, the RTP
voice gateway routes all
calls to the local fax server
and does not use the other
available fax servers.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
Vianen
Seattle
Sydney
IP
RTP
PSTN
48
Redundancy and Failover (Part 2)
 If the local fax server in
RTP is unavailable, the
voice gateway can route
incoming FoIP calls to an
alternate server, such as
San Jose.
 Or calls can be spread
between multiple fax
servers and in a load
sharing manner.
 The voice gateway can
handle many different
levels of preferences and
load sharing for complex
implementations.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
Vianen
Seattle
Sydney
IP
RTP
PSTN
49
Redundancy and Failover (Part 3)
 Gateway can be
configured to use ICMP
pings to monitor the
reachability of a fax server.
Vianen
 As long as fax server
responds to pings then fax
calls are routed to it.
 If pings become
unsuccessful then the
gateway routes calls to
alternate servers.
 Automatic failback occurs
when pings are successful
again.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
Seattle
IP
Sydney
ICMP
ICMP
Pings
Pings
RTP
PSTN
50
Redundancy and Failover (Part 4)
 Gateway can also failover
based on configurable
disconnect cause codes.
Vianen
 If the fax server is fully
loaded without any free
channels, then it will return
a disconnect cause code of
“user busy” for each
subsequent FoIP call.
 Instead of failing the call,
the gateway can reroute
the call to an alternate fax
server.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
Seattle
IP
Sydney
I’m busy,
all channels
are full.
RTP
No problem.
I will reroute
the call.
PSTN
51
Inter-Working with CGW –
Troubleshooting
 Where (in the network) does it go wrong?
 When, at what moment of the call, does it go wrong?
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
52
Inter-Working with CGW –
Troubleshooting
DSP
E1PRI
IP
SR140
POTS leg
VoIP leg
Each call in CGW has 2 call legs, usually a
• POTS leg
• VoIP leg
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
53
Inter-Working with CGW –
Troubleshooting
For an IP call / the VoIP leg:
SIP
VOICE - RTP
SDP
H.323
SIP
FAX – T.38
H.245
H.323
T.30
For a PSTN ISDN call / the POTS leg:
VOICE
ISDN
ISDN
FAX – T.30
 Each call consists of:
 Call control: SIP, H.323, ISDN,…
 Medium: Voice, Fax,…
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
54
Inter-Working with CGW –
Troubleshooting
 Getting the context info:
–Cisco model, type of PSTN interfaces, IP address of CGW, IP address of
fax server host, IP address of TR1034 ethernet, IP address of
gatekeeper/proxy
–“Show run/show config”: to get the CGW configuration
•Show run | begin xxxx
–“Show version”: to get the IOS version
 Enable viewing of cisco debugs:
–“Terminal monitor”
 Log debug output to a log file
 Enable millisecond timestamps:
–“service timestamps debug datetime msec” in configuration mode
 To disable debugging
–“no debug all”
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
55
Inter-Working with CGW –
Call Control Troubleshooting
sniffer
ECClog
DSP
E1PRI
IP
SR140
Debug ISDN Q931
Show Controller E1
Debug ccsip message
(Debug ccsip calls)
(Debug ccsip error)
(Debug h225 asn1)
Debug h245 asn1
• The switchover from VoIP to FoIP -> verify the DSP
channel is in fax mode: Show voice dsp
• Packet sniffer filter: “sip” or “h245”
• ECC log: at a minimum set in callctrl.cfg:
• host_module_trace=basic
• Ip_stack_trace=verbose
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
56
Inter-Working with CGW –
Call Control Troubleshooting
 Debug ISDN Q931: ISDN layer 3 protocol trace – establishing and
terminating of an ISDN call
 Show Controller E1: ISDN layer 1 alarms?
–Check when you are faxing but is “bad quality” and taking to long:
FTT, PPR,… fax messages (in API debug log)
–Check when fax messages are not received in time and the fax device
is already retransmitting the previous message
 Show ISDN Status: L1, L2, L3 states
 Show ISDN Service: status of each channel
 Debug isdn error
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
57
Inter-Working with CGW –
Call Control Troubleshooting
 Which dial-peer is my call hitting?
 Show call active voice brief
 Show call active fax brief
–Only for POTS leg
 Show call history voice brief
 Show call history fax brief
–Only for POTS leg
 Other commands that might be useful:
 Show dial-peer voice xxx
 Show dial-peer voice summary
 Show dialplan number xxx
 Debug voip dialpeer all
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
58
Inter-Working with CGW –
T.38 Troubleshooting
sniffer
DSP
E1PRI
IP
API
debug
log
SR140
Debug Fax Relay T30 All
(PCM Analysis)
• Debug Fax Relay T30 All:
• The T.30 messages that got demodulated at Cisco
DSP level
• The T.30 messages in and out of the DSP on the
POTS leg
• Turn on before the call attempt
• API debug log: “debug_control 9 1” in btcall.cfg
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
59
Inter-Working with CGW –
T.38 Troubleshooting
Voice Call establishment
Identification and selection of
capabilities
(V.21, 300 baud, Low Speed)
Training Check
T.4 Fax Transmission
V.22bis (1200 – 2400 Bps)
V.27 (2400 – 4800 Bps)
V.29 (4800 – 9600 Bps)
V.17 (9600 – 14400 Bps)
Confirmation of page
transmission
(V.21, 300 baud, Low Speed)
Call Release
(V.21, 300 baud, Low Speed)
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
60
Inter-Working with CGW –
Troubleshooting
 Network sniffer: ethereal/wireshark
 Best way to really see what is occurring on the VoIP leg
 Unbiased third party tool
 Jitter?
 Packet loss?
 Protocol problems?
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
61
Inter-Working with CGW –
SIP Problem-solving
 SIP disconnect cause code: 404:
–Number being passed into the cisco is not being recognised =>
check dial-peers
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
62
Inter-Working with CGW –
T.38 Problem-solving
 FTT, PPRs, … in API debug log/”debug fax relay t30 all”
 => synchronisation problem? -> “Show controller E1” -> clocking
configuration
 Messages are not being received in time before the fax device
retransmits the previous message
Delay ?
CGW jitter buffer: default 300 ms -> lower : “playout-delay fax 100”
Remove sources of delay
Packet loss? -> sniffer
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
63
Inter-Working with CCM/CUCM
 CCM = Cisco Call Manager
 CUCM = Cisco Unified Call Manager
 The Cisco IP-PBX
 Intelligence, call routing, billing, traffic analysis, voice prioritization
centralized, managed and maintained via a GUI interface e.g.
adding later on an extra fax number outside of the already
configured fax range can be done by a non-Cisco specialist as
opposed to having to know the command to add this to the
gateway’s IOS
 Gateways are the endpoints for originating and terminating calls to
and from the fax server while the Call Manager handles the call
routing
 Protocol MGCP: a media gateway control protocol; not a call
control protocol
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
64
Summary
 T.38 FoIP is one of many fax transport methods on
Cisco voice gateways and it must be explicitly
configured.
 If a current VoIP infrastructure exists then a FoIP
deployment can utilize the same QOS policies.
 Packet loss, jitter, and delay should be minimized for
FoIP and interface queuing mechanisms such as LLQ
can help.
 Voice gateways have a number of different redundancy
and failover features for communicating with multiple
fax servers.
 Cisco voice gateways and CallManger successfully
integrate with Cisco fax servers.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
65
For More Information on Integrating FoIP
with Cisco Products…
 Fax, Modem, and
Text for IP Telephony
incorporates FoIP
design, configuration,
and troubleshooting
guides as well as a
full chapter on fax
server integrations.
Available
December, 2007!
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
66
Building a
Cisco Fax Server
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
67
67
Cisco Fax Server Software
Two Fax offerings:
 Cisco Fax Server 9.3 Enterprise Suite
or
 Cisco Fax Server 9.3 Business Server
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
68
Cisco Fax Server Software
Base Software: Cisco Fax Server 9.3 Enterprise Suite
 RightFax Enterprise Server 9.3
 Exchange and Notes modules
 PDF module
 SecureDocs module
 Web Access module
 Localizations: English, Portuguese (Br.), Italian, German, Spanish, French, French-Canadian
 A single channel license is included
 Options:
– Additional document delivery channels
– Shared services module
– Integrations module
– MFP modules
– SR140 FoIP channel licenses or TR1034 fax boards
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
69
Cisco Fax Server Software
Base Software: Cisco Fax Server 9.3 Business Server
 RightFax Business Server 9.3
 Localizations: English, Portuguese (Br.), Italian, German, Spanish, French, French-Canadian
 A single channel license is included
 Options:
– Additional document delivery channels
– Exchange and Notes modules
– Web Access module
– PDF module
– MFP modules
– SR140 FoIP channel licenses or TR1034 fax boards
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
70
Cisco Fax Server Hardware
Servers
 Cisco MCS-7815, MCS-7825, MCS-7835, or MCS-7845 series servers
 If fax boards are used, full length/height PCI slots are required to support Brooktrout fax board(s)
–MCS-7815-I2, MCS-7835-H2, MCS-7835-I2, MCS-7845-I2 and MCS-7845-H2
 If SR140 FoIP fax channels are used, no PCI slots are required
–MCS-7815-I2, MCS-7825-H2, MCS-7825-I2, MCS-7835-H2, MCS-7835-I2, MCS-7845-I2 and
MCS-7845-H2
Fax Boards
 TR1034-4,8,16, 24 port T1 and 4, 8, 16, 30 port E1 card
 Not required if SR140 SW based FoIP fax channels ordered
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
71
Fax Channel Sizing
• Use the following table to determine the number of fax channels
required for the Cisco Fax Server based on expected use of the system.
• This calculation will determine the number of TR1034 ports or SR140
fax channels required and associated software channel licenses needed
Fax Channel Sizing
1 min. per page, 60 min. per hour, 8 hours per day, 21 days per month
480 pages per channel per day. Average fax length = 2.5 pages
Note: Most customers experience spikes in fax traffic during the course of the day. Servers should
be sized to accommodate these spikes in traffic.
Calculating daily volumes
# of pages / 8 hours / 60 minutes
Calculating monthly volumes
# of pages / 21 days / 8 hours / 60 min.
2000 faxes per day
2000 x 2.5 = 5000 (number of pages)
Number of pages / hours per day / minutes
per hour = Number of channels required.
5000 / 8 / 60 = 10.4
20,000 faxes per month
(20000 x 2.5 = 50000 pages per month)
Number of pages / days per month/ hours
per day / minutes per hour = Number of
channels required.
50,000 / 21 / 8 / 60 = 5.5
12 channel system
6 or 8 channel system
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
72
Storage Guidelines
Use the following table to determine the amount of storage required for the
Cisco Fax Server based on expected use of the system.
Fax Storage Guide
35k per page * 2.5 avg. pages per fax = 90k per fax
Note: A typical fax consumes 35 Kb per page, although some can be as large as 150 Kb, or as small
as 5 Kb.
100 faxes
500 faxes
1000 faxes
5000 faxes
12k faxes
20k faxes
9MB
44MB
88MB
440MB
1 GB
1.7GB
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
73
Cisco Fax Server MCS Hardware Matrix
The table below shows the storage and PCI slot availability for the
recommended server platforms.
Model
Processor
Memory
Hard Disk
RAID Config
DAT Drive
Redundant
Power
Redundant
Fans
Fax Board
Slots
MCS-7835-H1-ECS1 MCS-7845-H1-ECS1
MCS-7815-I2-ECS1
MCS-7825-H1-ECS1 or I1-ECS1
or I1-ECS1
Pentium D at
Pentium D at
Xeon Woodcrest
Xeon Woodcrest
2.80GHz dual-core
2.80GHz dual-core
2.33GHz
2.33GHz
2GB
2GB
2GB
4GB
80GB
2-80GB
2-72GB
8-72GB
2xRAID1
None
RAID 1
RAID 1
1xRAID10
External
External
External
External
No
No
Yes
Yes
No
No
Yes
Yes
4
0
2
2
A maximum of two TR1034 cards can be used per server
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
74
Cisco Fax Server-Order Configuration
•Cisco Fax Server order configuration
starts with the application software: CFS-93-ENT-STE or CFS-9-X-BUS-SERV
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
75
Cisco Fax Server–New System Orders
• Select the appropriate SKU within the Cisco Configuration Tool: CFS-93-ENT-STE for the Cisco Fax Server 9.3 Enterprise Suite, or CFS-9-XBUS-SERV for the Cisco Fax 9.3 Business Server
• Select the number of Fax Port Software Options - CFS-FAX-CHAN-1
• Select additional Software Options (Modules)
• Select a Boardless FAX Option, or FAX Board Hardware Options
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
76
Cisco Fax Server–HW/SW Port Options
• A Boardless Fax Option (CFS-SR140-XCHAN) license or Fax
Board Hardware Option(CFS-TR1034-T1-X or CFS-TR1034-E1-X)
is required for all Cisco Fax Server orders at this time.
• FAX Port Software Options (Channel licenses) are required in
addition to Boardless Fax (SR140) or TR1034 fax board ports
• Order MCS servers separately as spares
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
77
Cisco Fax Server-Example Configuration
One fax channel license comes enabled with the Enterprise Suite
and Business Server. That is why the example configuration
has 23 fax channels with a single 24 channel SR140 Boardless
Fax option.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
78
Upgrading a Cisco Fax
Server
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
79
79
Cisco Fax Server–Version Upgrades
Cisco Fax Server 9.0 Enterprise Suite to Cisco Fax Server 9.3 Enterprise Suite
 Order the version upgrade SKU - CFS-9-3-ENT-UPG=
 Includes Cisco Fax Server 9.3 Enterprise Suite Software and License
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
80
Cisco Fax Server–Feature Upgrades
• Select CFS-LIC-UPG within the Cisco Configuration Tool
• Select the number of Fax Port Software Options - CFS-FAX-CHAN-1
• Select additional Software Options (Modules)
• Order additional Boardless FAX Options (SR140) or Fax Board Hardware
Options (TR1034 fax boards) separately as spares
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
81
Cisco Fax Server Demo
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
82
82
Cisco Fax Server–Demo
CFS-TRIAL-SW
 $0 SKU
 Includes SW for Cisco Fax Server 9.3
 30 day timed-out demonstration mode with no license required
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Confidential
83
Q&A
Marco Brugge
[email protected]
International Solutions Consultant Strategic Alliances
ph. +31 (0)34 732 4223|
© 2007 Cisco Systems, Inc. All rights reserved.
fax: +31 (0)34 732 4286|
Cisco Confidential
mob. +31 (0)651 507 220 |
84