|
Business Relocations
Technology Relocation
Project Management
Consulting Services
Call Now
(888) 897-5042
It Infrastructure
PBX & Voice Mail
Call Center
Telecommunications
Consulting Services
| |
Nortel Meridian PBX and
Cisco Call Manager Integration
With today's open interfaces and Call center solutions
many firms are looking at cross platform solutions which will address the needs
of their strategic call center solutions. Let's look at what it takes to configure
a combined Nortel and Cisco solution for a customer.
The following configuration is taken from a Nortel Meridian 1 Option 81c private
branch exchange (PBX), running Release 2337. A T1 Primary Rate Interface (PRI)
was defined for connecting a DT24+ Voice over IP/Time Division Multiplexing (VoIP/TDM)
gateway.
A NT-6D80AB 4 port Multiple Serial Data Link (MSDL) was used to provide D-channel
framing for the PRI.
There are three generations of PRI cards:
- The oldest one supports one PRI and requires one serial port on the MSDL for
the D-channel.
- The next generation supports 2 PRIs and requires two serial ports on the MSDL
for the D-channel.
- The newest one supports one PRI and does not require an MSDL serial port for
the D-channel. (It has a high-level data link (HDLC) framer on the card)
This PBX had the second generation PRI card, it required a physical cable to
be run from the PRI card to a port on the MSDL.
The DT24+ was set to ISDN Network side, with a switch type of 5E8 Custom. The PBX
PRI trunk was set to ISDN User side, with a switch type set to ESS5. This worked
and is the configuration show below. We tried setting the switch type on the
PBX trunk to DMS100, but no matter what we did on DT24+, the PBX always saw the
trunk as in maintenance mode and calls were rejected.
This trunk was configured for a test scenario. The extension for the IP
phone was x7373 and for the digital phone was x6925. When calling
the IP phone from the digital phone, the access code 8815 was first dialed
to select the specific PRI trunk (see ACOD 8815 in LD21 below), then the extension
of the IP phone was dialed. For this test, the configuration allowed a number
to be selected for the IP phone that could be uniquely routed.
If you experience any problems after the Tspan is connected, and there are no
framing, LOS, or sync errors, you will need to consider the following troubleshooting
areas:
- T1 Layer 1 Troubleshooting
- T1 Error Events Troubleshooting
- T1 Alarm Troubleshooting
For the D channel to become active, it does not matter which side (PBX or the
VoIP gateway) is set to ISDN USER or NETWORK. Set one device to ISDN USER and the
other to NETWORK.
At this point Layer 1 will be active. For Layer 2 to initialize, each side will
send Q.921 SABME frames. One side will respond with a Q.921 UA UnAcknowledged message,
after which both sides will begin to exchange Receiver Ready (RR) messages.
At this point Layer 2 connectivity is established.
For further explanation of the PBX commands, we refer to Nortel's "Administration
Input/Output Guide for Meridian 1" and Nortel's "1.5 mb DT1/PRI Administration and
Maintenance Guide".
Typical Configuration for T1 Settings
| D Signaling Channel Configuration |
| Configuration Parameters
Comments |
>LD 22 load overlay module 22 to print an i/o device report
PT2000
REQ PRT @ Request prompt, enter "PRT" to print
TYPE ADAN DCH 8 @ Type prompt, enter:
"ADAN" for all i/o devices
"DCH" to specify D-channel devices
"8" to for the D-channel with ID #8
ADAN DCH 8 configuration for i/o D-channel 8
CTYP MSDL card type - Mutiple Serial Data Link
GRP 1 System group - 1
DNUM 12 i/o device number - 12
PORT 3 physical port - 3
DES CISCO description
USR PRI D channel - PRI only
DCHL 115 the PRI card - aka "loop" - the channel is for
OTBF 32 default - 32 output request buffers
PARM RS422 DTE default - physical interface type
DRAT 64KC default - physical interface rate
CLOK EXT default - physical interface clocking
NASA NO default - Network Attendant Service Allowed?
IFC ESS5 Interface - aka "switch type"
SIDE USR IDSN "side" - ie either USR or NET
CNEG 1 default - Channel Negotiation Option
RLS ID 36 release ID of the switch at the far end of the D-channel -
36, use 23 for SL1 <-> SL1
RCAP ND2 Remote D-channel Capabilities - name display 2
T200 3 default - retransmission Timer
T203 10 default - max Time secs without frames being exchanged
N200 3 default - max Number of retransmmissions
N201 260 default - max Number of octets in information field
K 7 default - max number of outstanding frames
REQ **** type **** to exit overlay module 22
OVL000
|
| B Bearer Channel Configuration |
|
>LD 20 load overlay module 20 to print a Terminal Number Block
report
PT0000
REQ: PRT @ Request prompt, enter "PRT" to print
TYPE: TNB @ Type prompt, enter "TNNB" for Terminal Number Block
TN 115 1 @ TN prompt, enter:
"115" to specify Terminal Number Block - aka "loop" # 115
aka PRI card 115
"1" to specify B-channel #1, could be 1-23
SPWD
DATE
PAGE
DES
TN 115 01 configuration for TNB 115, B channel 1
TYPE TIE type of trunk - TIE, could be DID ..., see LD 14
CDEN SD default - card port density - single density
CUST 0 Customer number - 0 get operator "x", 1 get "Y", ...
NCOS 0 Network Class Of Service group - 0, change if trouble
calling in or out
RTMB 115 1 Route Number and Member Number - member 1, could be
2...23, of route block number 115
B-CHANNEL SIGNALING
TGAR 1 Trunk Group Access Restriction - 0-31, 1 in this case
AST NO default - Associated Trunk for CTI trunk monitoring and
control? - no
IAPG 0 default - Event Group for USM message 0-15
CLS CTD DIP WTA LPR APN THFD HKD default - Class of Service:
P10 VNL CTD - Conditionally Told Denied
DIP - Dial Pulse
WTA - Warning Tone Allowed
LPR - Low Priority
APN - ACD Priority Not Required
THFD - Centrex Switchhook Flash Denied
HKD - Hong Kong DTI Denied
P10 - 10 pulses per second
VNL - Via Net Loss, see LD14
TKID default - Trunk Identifier - like to refernce a
circuit ID
DATE 14 JUN 2000 default - date of this report
NACT **** type **** to exit overlay module 20
OVL000
|
| Call Routing Configuration |
|
>LD 21 load overlay module 21 to print a Route Data Block report
PT1000
REQ PRT @ Request prompt, entered "PRT" to print
TYPE: RDB @ Type prompt, entered "RDB" for Route Data Block
CUST 0 Customer number - 0 get operator "x", 1 get "Y", ...
ROUT 115 Route Number - 0-127, 0-511 - 115, matches Terminal Block
Number above
TYPE RDB Route Data Block
CUST 00 Customer number - 0
ROUT 115 Route Number - 115
DES CISCO description
TKTP TIE type of trunk - TIE, could be DID ..., see LD 14
ESN NO default - Electronic Switched Network pad control? - no
CNVT NO default - Conventional switch route? - no
SAT NO default - Satellite used for trunk route?
RCLS EXT default - Route Class marked as external?
DTRK YES Digital Trunk Route? - yes
DGTP PRI Digital Trunk Type for route - PRI, could be BRI ...
ISDN YES ISDN? - yes
MODE PRA Mode of operation - PRA, could be ISLD ..., see LD16
IFC ESS5 Interface Type for this PRI route - ESS5, could be S100,
D100, ...
SBN NO default - Send Billing Number?
PNI 00000 default - Private Network Identifier?, see LD16
SRVC NNSF default - Service type provisioned - No Network Specific
Facility NNSF, could be M800, IWAT, ...
NCNA YES default - Network Calling Name Allowed? - yes
NCRD NO default - Network Call Redirection Allowed? - no
CHTY BCH Channel Type - BCH, could be ABCH
CTYP UKWN default - Call Type for outgoing direct dialed TIE route-
Unknown, could be INTL, NXX, ...
INAC NO default - Insert ESN Access Code to incoming private
network call? - no
ISAR NO default - Integrated Service Access Route denied? - no
TGAR 1 Trunk Group Access Restriction - 0-31, 1 in this case
BCOT 0 default - B-channel Overload Control Timer - 0
DSEL VOD default - Data Selection - Voice or Data Route VOD
PTYP PRI Port Type at far end - PRI, could be ATT, ACO, ...
AUTO NO default - Auto-Terminate? - no, terminate normally.
DNIS NO default - ACD DNIS route?
DCDR NO default - Include DNIS in CDR records? related to ACD- no
ICOG IAO Incoming and/or Outgoing trunk - IAO, could be ICT, OGT
SRCH LIN default - Linear Hunting Search Method for outgoing trunk
member - LIN, could be RRB
TRMB YES default - Tromboning allowed? - yes
STEP default - Alternate trunk route for outgoing trunks - " ",
could be 0-511
ACOD 8815 Access code for the trunk route - 8815 - see note above
TCPP NO default - CPP flag for incoming non-ISDN trunk call
tandemed to this trunk - no
PII NO default - Calling Privacy Indicator Ignored? - no
TARG 01 Trunk Access Restriction Group - match "TGAR" - 1
CLEN 1 default - Calling Line ID entry number - 1
BILN NO default - Billing Number required? - no
OABS default - Actual Outgoing toll digits to be ignored for
code restriction - " ", could be 0-9.
INST default - Insert - " " = no digits are entered
ANTK default - ANI identifier number
SIGO STD default - Signaling arrangement - std, could be ESN3, ...
ICIS YES default - Incoming Identifier Send - yes
TIMR ICF 512 default - Trunk timer: Incoming Flash - 512ms
OGF 512 default - Trunk timer: Outgoing Flash - 512ms
EOD 13952 default - Trunk timer: End of Dial - 13952ms
NRD 10112 default - Trunk timer: No Ringing Detector - 10112ms
DDL 70 default - Trunk timer: Dial Delay - 70ms
ODT 4096 default - Trunk timer: End of dial for DIGITONE trunks -
4096ms
RGV 640 default - Trunk timer: Ring Validation - 640ms
GRD 896 default - Trunk timer: Guard - 896ms
SFB 3 default - Trunk timer: Seize Fail Busy - 3s
NBS 2048 default - Trunk timer: Enblock Short dialing - 2048ms
NBL 4096 default - Trunk timer: Enblock Long dialing - 4096ms
IENB 5 default - Trunk timer: Idle Extension Notification Block -
5s
TFD 0 default - Trunk timer: Timed Forced Disconnect - 0s
DRNG NO default - North American Distinctive Ringing? - no for tie
trunks to have normal ringing
CDR NO default - Call Detail Recording for this route? - no
MUS NO default - Music on hold? - no
RACD NO default - Route traffic information in ACD reports? - no
OHQ NO default - Off-Hook Queuing? - no
PAGE 002 page 2 of this report
OHQT 00 default - Off-Hook Queue Threshold - 0s
CBQ NO default - Call Back Queuing? - no
AUTH NO default - Authorization code to be prompted for incoming
NARS/BARS calls? - no
TDET NO default - Tone Detector required? - no
PLEV 2 default - Priority Level - 2, could be 0-7 for forcing
override, camp-on, ...
ALRM NO default - Malicious Call Trace Alarm is allowed for
external calls? - no
ART 0 default - Access Restriction Table - 0
SGRP 0 default - Scheduled access Restriction Group - 0
AACR NO default - Route Acquired by Application? - no
|
This will give us a good starting point with which to identify
the types of configurations we may need to setup the interface between the Cisco
and the Nortel system to address client needs.
For more information or assistance in setting up your network solution, please
contact one of our Telecommunications Consultants at (925) 683-7916.
|
