John,
 
Fixed assignment on modems means if a call from the telco comes in on span 1 channel one, it will hit modem 1 in slot one. If you set it to round robin, a call that comes in on span 1, channel 1, might hit modem card 1 channel 15.
 
What you don't have control over is the TELCOs call routing method (of course, you can call them and request a different routing method).
YOU can only control MODEM call routing assignments for calls that hit a particular modem.
 
Same principle:
 
Round Robin from the telco gives you equal distribution/usage of all cards.
Round Robin set on the DSP will give you even distribution/usage of modems on that card.
 
In the example below, if you have your DSP's set to distribute calls in a fixed assignment fashion, then you can be pretty sure you received calls from the telco on
Span 1/Ch 24
Span 1/ch 22
Span 2/ch 24
Span2/Ch 1
 
Hope that helps...
 
Rick
Team Solunet
-----Original Message-----
From: John R. Aynesworth [mailto:jra@hcsinc.com]
Sent: Thursday, March 06, 2003 5:52 PM
To: usr-tc@mailman.xmission.com
Subject: [USR-TC] Fixed assigment modem routing

I'm trying to set up fixed assignment modem routing on a TC1000 running TCS 4.2.73 with two HiPER DSP's running 2.1.9 attached to channelized T1's.  I've used both the DSP console level command "set mdmrmeth fixeda" and the TCM method using Configure/Programmed Settings/Card Level/Parameter/Routing Method.  A "display mdmrmeth" on each DSP in console mode shows FIXED ASSIGNMENT.  Any suggestions?  Am I missing something?
 
 
HiPer>> list ip pool
 
IP ADDRESS POOLS
Name                Address        Size InUse State   Route      Unused Status
tcpool           156.46.203.129/26 48   45    PUBLIC  NO_AGGREGATE 0    ACTIVE
HiPer>> list ip netwo
 
CONFIGURED NETWORKS
Name                            Prot Interface       State Type Network Address
hnet                            IP   eth:1           ENA   STAT 156.46.108.4/C
IP-loopback                     IP   loopback        ENA   AUTO 127.0.0.1/H
ek-ip-I1513                     IP   slot:2/mod:1    ENA   DYN  156.46.203.177/H
deb-ip-I1536                    IP   slot:2/mod:24   ENA   DYN  156.46.203.163/H
jab-ip-I1278                    IP   slot:1/mod:22   ENA   DYN  156.46.203.145/H
jjw-ip-I1280                    IP   slot:1/mod:24   ENA   DYN  156.46.203.129/H