Figure 24 computer call – Nortel Networks NN43001-121 User Manual

Page 69

Telephony Gateway and Services planning

Figure 23
Computer call

LG-Nortel IP Phone 8540 OCS desk phone

An Enterprise Voice only

client (no PBX integration enabled) that is configured for an OC 2007 client
or 8540 OCS desk phone, will be able to make PSTN calls using the CS
1000 as the gateway. You are required to configure a TN and twinned PCA
on the CS 1000 even if there is no actual phone present for this client. This
is because the MCM will perform homing on each OC client that makes an
outgoing call before allowing it to proceed with the call.

Mixed network with SPS and SRS servers

On a mixed network where

both SPS and SRS servers are present, MCM must be configured in SRS
mode for collaboration server routing to work properly.

RCC only mode

Nortel recommends you do not define users with RCC

only mode since certain restrictions apply to this functionality. For example,
a PCAM class of service should not be defined for these users.

Bandwidth usage direct OC-to-OC audio call

The bandwidth usage of

a Mediation Server direct OC-to-OC audio call is not calculated on the CS
1000. This portion of the required bandwidth should be calculated with
Microsoft consultation and added to the Nortel bandwidth recommendations
for Converged Office users. Failure to do so might impact the quality of the
Converged Office calls in case bandwidth usage exceeds the planned limits.

Microsoft CFAC

Microsoft does not support Call Forward All Calls (CFAC)

to voice mail on the OC client when users have Call Forward No Answer
(CFNA) configured to voice mail and not Office Communicator. In order to
have this functionality for an Enterprise Voice user with PBX integration,
voice mail should be configured on the user’s phone. If the user is in
VoIP only mode (no phone) then the only option is for the administrator to
configure the PCA with Call Forward No Answer (CFNA). In this case, the
calls will ring 4 times before being redirected to voice mail.

Nortel Communication Server 1000

Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007

NN43001-121

01.03

Standard

Release 5.0

30 April 2008