Getting 1200 bps for paging

["R.D. Thrush" <rd@thrush.com>]

  I've had a shared fax/data modem environment for several years based
on FlexFAX and HylaFAX using a USR Courier V.everything modem.  I
would like to add paging functionality to the mix; however, I can't
make it work without changing the global ModemRate parameter to 1200.

  Unfortunately, setting ModemRate to 1200 renders the modem virtually
useless for anything but pages.

  How can I add paging functions to my existing environment without
slowing everything down to 1200 bps?

  [ FWIW, I seem to remember a capability (several years ago) to
change the DTE baudrate as part of a modem command string.  I think
that might solve my problem. ]

  Here's my current BSD/OS 3.0 config:

CountryCode:		1
AreaCode:		407
FAXNumber:		+1.407.xxx.yyyy
LongDistancePrefix:	1
InternationalPrefix:	011
DialStringRules:	etc/dialrules
ServerTracing:		1
#SessionTracing:		11
SessionTracing:		0x3fff
RecvFileMode:		0644
LogFileMode:		0644
DeviceMode:		0600
RingsBeforeAnswer:	1
SpeakerVolume:		off
GettyArgs:		"bidir.%s-hf"
LocalIdentifier:	+1407xxxyyyy
LogFacility:		local5
TagLineFont:		etc/lutRS18.pcf
TagLineFormat:		"From %%l|%c|Page %%p of %%t"
MaxRecvPages:		100
#
#
# Modem-related stuff: should reflect modem command interface
# and hardware connection/cabling (e.g. flow control).
#
ModemType:		Class2.0	# use class 2.0 interface
ModemRate:		115200		# DCE-DTE communication rate
#ModemRate:		1200		# DCE-DTE communication rate
ModemFlowControl:	rtscts		# XON/XOFF flow control assumed
#
ModemNoFlowCmd:		AT&H0&I0&R1	# setup modem for no flow control
ModemHardFlowCmd:	AT&H1&I0&R2	# setup modem for hardware flow control
ModemSoftFlowCmd:	AT&H2&I2&R1	# setup modem for software flow control
#
ModemSetupDTRCmd:	ATS13=1&D2	# setup so DTR drop resets modem
ModemSetupDCDCmd:	AT&C1		# setup so DCD reflects carrier (or not)
ModemResultCodesCmd:	ATQ0X4		# enable extended result codes
#
# NB: adaptive answer only seems to work properly when
#     the modem is left idling in Class 2.0
#
ModemSetupAACmd:	AT+FAA=1
#
# Set modem speaker volume commands: OFF QUIET LOW MEDIUM HIGH.
# Note that we both turn the speaker on/off and set volume.
#
ModemSetVolumeCmd:	"ATM0 ATM1 ATM1 ATM1 ATM1"
#
# Modem does not support HDLC frame tracing; we add this just
# to eliminate spurious ERROR results that confuse the naive.
#
Class2BUGCmd:		AT+FBU=0
#
# The modem doesn't support copy quality checking, even though it
# returns (0-2,0-2) for AT+FCQ=?; therefore we override the query
# response so that the server will do copy quality checking.
#
Class2CQQueryCmd:	!(0),(0)	# override modem response
#
PagerSetupCmds:         AT&N2&K0&M0   # 1200 baud.

  And here's a trace of a failed session: (BTW, just changing
ModemRate to 1200 will work):

May 08 14:45:57.26: [ 2083]: SESSION BEGIN 00000417 18009464644
May 08 14:45:57.26: [ 2083]: SEND PAGE: JOB 30 DEST 1-800-946-4644 COMMID
00000417
May 08 14:45:57.26: [ 2083]: MODEM set DTR OFF
May 08 14:45:57.26: [ 2083]: DELAY 2600 ms
May 08 14:45:59.86: [ 2083]: MODEM set DTR ON
May 08 14:45:59.86: [ 2083]: MODEM set baud rate: 115200 baud, input flow
RTS/CTS, output flow RTS/CTS
May 08 14:45:59.86: [ 2083]: MODEM flush i/o
May 08 14:45:59.86: [ 2083]: <-- [17:ATE0V1Q0X4S0=0H0\r]
May 08 14:46:00.02: [ 2083]: --> [16:ATE0V1Q0X4S0=0H0]
May 08 14:46:00.02: [ 2083]: --> [2:OK]
May 08 14:46:00.02: [ 2083]: <-- [32:ATS8=2S7=60&H1&I0&R2S13=1&D2&C1\r]
May 08 14:46:00.18: [ 2083]: --> [2:OK]
May 08 14:46:00.18: [ 2083]: <-- [5:ATM0\r]
May 08 14:46:00.34: [ 2083]: --> [2:OK]
May 08 14:46:00.34: [ 2083]: MODEM set parity: 7 bits, even parity
May 08 14:46:00.34: [ 2083]: STATE CHANGE: RUNNING -> SENDING
May 08 14:46:00.34: [ 2083]: MODEM input buffering enabled
May 08 14:46:00.36: [ 2083]: <-- [12:AT+FCLASS=0\r]
May 08 14:46:00.50: [ 2083]: --> [2:OK]
May 08 14:46:00.50: [ 2083]: DIAL 18009464644
May 08 14:46:00.50: [ 2083]: <-- [16:ATDT18009464644\r]
May 08 14:46:25.64: [ 2083]: --> [12:CONNECT 1200]
May 08 14:46:25.64: [ 2083]: EXPECT ID (paging central identification)
May 08 14:46:25.64: [ 2083]: <-- <1:\015>
May 08 14:46:27.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:27.64: [ 2083]: <-- <1:\015>
May 08 14:46:29.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:29.64: [ 2083]: <-- <1:\015>
May 08 14:46:31.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:31.64: [ 2083]: <-- <1:\015>
May 08 14:46:33.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:33.64: [ 2083]: <-- <1:\015>
May 08 14:46:35.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:35.64: [ 2083]: <-- <1:\015>
May 08 14:46:37.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:37.64: [ 2083]: <-- <1:\015>
May 08 14:46:39.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:39.64: [ 2083]: <-- <1:\015>
May 08 14:46:41.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:41.64: [ 2083]: <-- <1:\015>
May 08 14:46:43.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:43.64: [ 2083]: <-- <1:\015>
May 08 14:46:45.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:45.64: [ 2083]: PAGE FAILED: No initial ID response from paging
central
May 08 14:46:45.64: [ 2083]: <-- [5:ATH0\r]
May 08 14:46:50.64: [ 2083]: MODEM TIMEOUT: reading line from modem
May 08 14:46:50.64: [ 2083]: MODEM <Timeout>
May 08 14:46:50.64: [ 2083]: STATE CHANGE: SENDING -> MODEMWAIT
May 08 14:46:50.64: [ 2083]: MODEM input buffering enabled
May 08 14:46:50.66: [ 2083]: MODEM set DTR OFF
May 08 14:46:50.66: [ 2083]: SESSION END