Installation guide
Table Of Contents
- Contents
- Features Introduced in Previous Releases of VISM Software
- Elements of Release 3.1(1)
- Installation and Upgrade Procedures
- VISM Firmware and Boot Code Download Procedure for PXM1
- VISM Firmware and Boot Code Download Procedure for PXM1E and PXM45
- VISM/VISM-PR Firmware Upgrade
- VISM to VISM-PR Hardware Upgrade
- Installing VISM Software Updates with PXM1 Cards
- Installing VISM Software Updates with PXM1E or PXM45 Cards
- VISM Boot Code Upgrade Procedure with PXM1 Cards
- VISM Boot Code Upgrade Procedure with PXM1E and PXM45 Cards
- VISM Downgrade Procedure
- Caveats
- Related Documentation
- Obtaining Documentation
- Obtaining Technical Assistance
- Obtaining Additional Publications and Information
16
Release Notes for Cisco Voice Interworking Service Module Release 3.1(1)
OL-3480-01 Rev. C0, January 2003
Caveats
Open Caveats
Table 8 describes possible unexpected behavior by software Release 3.1(1) for VISM/VISM-PR.
Table 8 Open Caveats for Software Release 3.1(1) for VISM/VISM-PR
DDTS Issue Description
CSCdx94130 Title: VISM loses some DTMF digits when ON time is less than 45ms
Description: VISM randomly fails to detect some of the digits resulting in call failure.
Workaround: The equipment should generate DTMF digits with ON time greater than
or equal to 45ms.
CSCdz65510 Title: CSCdz65510 T.38 calls fail in Voip Trunking
Description: When using ISDN PRI backhaul in Voip Trunking on VISM-T1, running
a load of 23 T.38 Fax Relay calls can cause the backhaul LAPD session to
intermittently go down.
Workaround: The problem is related to VISM only and was not experienced on
VISM-PR when running a similar T.38 Fax relay load. However, if VISM-PRs are not
available and VISM is the only option, use fax pass through instead, if higher number
of T.38 fax calls is expected, since this problem was not experienced when running
corresponding load via fax pass through over the ISDN Backhaul in Voip Trunking.
CSCdz65552 Title: Running Fax Pass-Thru load over ISDN PRI fails in VoIP Switching mode
Description: On a VISM-T1 in Voip Switching mode, running a fax pass thru call load
over ISDN PRI for extended periods of time causes call completion rate to go down.
CSCdz64830 Title: Broadcasting T.38 FAX relay on 20+ endpoints on a VISM card fails
Description: When running on VISM-T1 in Voip Switching mode, running a
sustained load of more than 20 fax calls via T.38 relay causes the VISM card to
lockup and starts failing the calls. This is a performance issue and is experienced
when running a higher number of T.38 fax calls.
Workaround: This problem is not experienced when running a similar T.38 Fax load
on the VISM-PR card.
CSCdz64206 Title: Degradation of voice quality when multiple announcement RQNTs sent
Description: Degradation of voice quality was observed when playing announcement
concurrently on all 240 endpoints on a VISM-E1.
Workaround: It was observed that voice quality is fine up to 185 endpoints, but it
starts to progressively deteriorate beyond that. Therefore, it is not expected to have
significant impact on VISM-T1, which supports up to 192 endpoints.