EXHIBIT 99.1


FOR IMMEDIATE RELEASE                                          November 10, 1999

CONTACT:
Donald L. Rich, President & CEO                                  (408) 496-0474

                Castelle announces third quarter of 1999 results

SANTA CLARA, Calif., November 10, 1999 - CASTELLE (Nasdaq: CSTL) today announced
financial  results for the third fiscal quarter ended October 1, 1999. Net sales
were $4.0 million for the three months ended October 1, 1999 versus $5.4 million
in the same period of 1998. The Company reported a net loss of $798,000 or $0.17
per share  compared  to a net loss of  $393,000  or $0.09 per share in the third
quarter of 1998.  The  results of the third  quarter of 1999  include a one-time
restructuring  charge of $522,000 or $0.11 per share. The  restructuring  charge
includes  expenses  associated  with the  Company's  exit from certain  lines of
business,  a reduction in the Company's  workforce,  and expenses related to the
write-off of excess office space. If adjusted to exclude this charge, results of
the third  quarter of 1999 would have shown a net loss of  $276,000 or $0.06 per
share.

Net sales for the first nine  months of 1999 were $12.2  million  compared  with
$18.1 million for the same period of 1998.  Net loss for the  nine-month  period
was  $3,669,000 or $0.80 per share compared to a net loss of $1,135,000 or $0.25
per share for the 1998 period.  Excluding the above-mentioned one-time charge of
$522,000  and the excess  inventory  provision of  $1,248,000  in the first nine
months of 1999,  the net loss for the first nine months of 1999 would have shown
a net  loss of  $1,899,000  or $0.42  per  share.  The net  losses  reflect  the
continuing  decline  in  print  server  sales,  primarily  due to  the  business
conditions  in the  Asia  Pacific  region,  and  the  decline  in  shipments  to
distributors to support the Company's  continued effort to manage down inventory
levels in the distribution  channel.  The cash balance increased to $4.3 million
at the end of the third  quarter  of 1999 from  $3.9  million  at the end of the
fourth quarter of 1998 and days sales outstanding improved to 41 days at October
1, 1999 from 87 days at the end of 1998.

Donald L. Rich,  President and CEO, stated: "Over the course of the past year we
have implemented cost reduction  programs  resulting in lower operating expenses
and higher  margins.  We continue to develop new products and by the end of this
year will have  replaced  our entire Fax Server  product  line with new enhanced
hardware models and software releases. We believe we are well positioned and our
objective is to turn the corner and achieve profitability in the upcoming fourth
quarter of 1999."

Founded in 1987,  Castelle is an industry  leader and pioneer of network fax and
print  servers that increase  productivity  in  workgroups  and the  enterprise.
Castelle  products are available through a worldwide network of distributors and
Value Added Resellers.  Castelle is headquartered in Santa Clara, Calif. and can
be reached at 1-800-289-7555; (408) 496-0474; or www.castelle.com.

This press release  contains  forward-looking  statements that involve risks and
uncertainties,  relating to the future events, including the Company's objective
to  achieve  profitability  in the  fourth  quarter  of 1999,  the timing of the
replacement of the Company's Fax Server product line with new enhanced  hardware
models and software releases and the effect of improved  business  conditions in
the Asia Pacific  Region on the  Company's  results of their print server sales.
Actual events or the Company's  results may differ materially from the events or
results  discussed  in the  forward-looking  statements  for a number of reasons
including, without limitation, the timely development, acceptance and pricing of
new products and the general  economic  conditions  as they affect the Company's
customers.  The  Company  assumes no  obligation  to update the  forward-looking
information.  Investors  are  referred  to the  full  discussion  of  risks  and
uncertainties  associated  with  forward-looking  statements  contained  in  the
Company's 10-K for the fiscal year ended December 31, 1998.

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