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Speed of connection to 3640 NAS

We have a 3640 NAS Server with Analog Modem Module on our Network for Dial-in users. For a long time the speed of connection to this equipment went of 40K, but for a time the speed has gone down to 32K. We believe that this descent of speed is due to the fact that a few months ago I change this 3640 into other one due to an effect, but the software that had before was 12.0 ( 9 ) IP PLUS and after the change of hardware there were left 12.0 ( 7 ) XK1 IP. We want to recover the speed of connection of 40 K it seems to you that it can be due to the SW? One is necessary to put version IP PLUS to return to 40K? Thank you very much...

R4700 CPU at 100Mhz, Implementation 33, Rev 1.0

MICA-6DM Firmware: CP ver 2310 - 6/3/1998, SP ver 2310 - 6/3/1998.

Channelized E1, Version 1.0.

Bridging software.

X.25 software, Version 3.0.0.

Primary Rate ISDN software, Version 1.1.

1 Ethernet/IEEE 802.3 interface(s)

62 Serial network interface(s)

60 terminal line(s)

2 Channelized E1/PRI port(s)

DRAM configuration is 64 bits wide with parity disabled.

125K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read/Write)

interface Serial3/1:15

ip unnumbered Ethernet2/0

no ip directed-broadcast

ip nat outside

encapsulation ppp

ip mroute-cache

no logging event link-status

dialer rotary-group 1

dialer-group 1

isdn switch-type primary-net5

isdn incoming-voice modem


interface Group-Async1

description Primario :

ip unnumbered Ethernet2/0

ip access-group 101 in

ip access-group 101 out

ip helper-address

ip helper-address

no ip directed-broadcast

ip nat outside

encapsulation ppp

ip tcp header-compression passive

no logging event link-status

async mode interactive

peer default ip address pool setup_pool

ppp authentication pap

ppp authorization seeAutho

ppp accounting seeAcount

group-range 1 30


Re: Speed of connection to 3640 NAS

What was the modem portware with the older box (the present one shows 2310 ....MICA-6DM Firmware: CP ver 2310).

IP or IP Plus should not make a difference, can you please try to upgrade the portware to atleast 2740.

To begin with let's go with the theory that you only changed the equipment but nothing changes in the telco lines.

Thanks, Mak.

New Member

Re: Speed of connection to 3640 NAS

Hola MaK:

I am very grateful for your help, I will upgrade the portware of the modems. Thank you very much


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