the Access Layer, the data network is providing power to the IP telephones using
in-line power modules. The Access
Layer switches are Catalyst 4006 which contain 48 port 10/100 Fast Ethernet
in-line power modules. The in-line power modules require an Auxiliary DC Power
Shelf, a 1050W Catalyst 4000 Auxiliary Power Supply Unit, and a Power Entry
Module for the chassis power supplies. UPS systems are recommended in the
wiring closets and data center to provide continuous power in the event of a
power failure, maintaining high availability of the voice and data network.
IP telephone will not occupy an additional data network port. The user workstation will be connected
directly into the switched port on the IP telephone.
4006 Access Switches (Layer 2) are dual homed to Core Catalyst 6509 Switches
(Layer 3). There are 36 floors with 2 IDFs per floor, each containing a single
4006. There will be (4) four 6509
(Layer 3) switches deployed as core switches to aggregate all of the Access
will be deployed in the core switches to insure L3 default gateway redundancy.
HSRP priority will be used to force voice traffic over one Gigabit uplink, and
data over the second Gigabit uplink for each closet switch.
Fast will be enabled in the access switch ports connected to the phones. This
will reduce the time required for the phones to register with Call Manager.
- The Core Switches will be dual homed to (2) two Catalyst 6509s
acting as PRI/T1 voice gateways to the PSTN. Each core 6509 chassis will have
one (1) SUP2 with MSFC2 and PFC2 module. These (4) four switches will also
provide connectivity for the CallManager Cluster components, 6509 FlexWans
providing WAN connectivity, and VG248s for FAX/Modem support and existing
- The voice PRI/T1 circuits will be divided evenly between two
redundant Catalyst 6509 voice gateways. Each Catalyst voice gateway will have
two (2) SUP2 with PFC2 modules for redundancy.
- Each Catalyst 6000 Voice T1 module has 8 ports. Each individual
port on this module can be configured to support either a T1 or PRI. The Catalyst 6000 Voice T1 modules will
be provisioned on each of the two (2) 6509 chassis acting as voice
gateways. The voice PRI/T1 circuits
will be distributed evenly to each Voice T1 module. The unused ports on the Voice T1 module
can be used for conferencing and/or MTP transcoding.
- Additional Voice T1 modules were
provided for hardware based conferencing.
CallManager Servers are connected to the (4) Core Switches in a distributed
manner to minimize the impact on call processing of a single Core Switch
VG248s will provide 288 analog FXS ports for connectivity to the vmail servers.
SMDI signaling will be received by the Lyrix server via the VG248. CallManager
will communicate voice messaging information to the VG248 via skinny protocol.
Connectivity of (6) SMDI links from vmail server to each VG248 will be tested. This
architecture can potentially provide the most SMDI redundancy. Alternatively, a
single SMDI cable will be connected from Lyrix to a single VG248, and then daisy
chained across the 6 VG248s.
data/telephone closet will have cross connects to the data center via Cat 3
riser for analog station ports. This will enable placement of (22) VG248 Analog
voice gateways in the data center to provide FXS ports to support 1,056 analog
stations distributed throughout the building. The VG248 will support Fax Relay
and Modem Pass-Through in additional to analog handsets and potentially Polycom
3662 gateways will be deployed to provide analog gateway capability for 48 FXO
ports. These trunks will be used in the event that all digital trunks are
unavailable due to a SONET ring failure. These analog trunks can also be used
for overflow in the event that all digital trunks are busy.
- One (1)
3662 gateway with a total of (16) FXO ports will be provided to serve MN and CF. (8) FXO ports will be dedicated to each entity. These
trunks will be used in the event that all digital trunks are unavailable due to
a SONET ring failure. These analog trunks can also be used for overflow in the
event that all digital trunks are busy.
- MN and
CF are provided with 2 dedicated PRIs each for billing
purposes. These entities will utilize CallManager for call processing and the
6608 gateways, however, they will be restricted to their dedicated PRI
facilities. There will be no 5 digit dialing capability between these entities
and HQ users. MN and CF users will be served by the
common voicemail system. Partitioning of voicemail server to serve these users is not
- Thirty eight thousand (3,800)
Agilquest hoteling users will be supported via the extension mobility API. It
should be noted that the 7910 phones will not support extension mobility (Agilquest
On Hold is not required, so no additional servers are provided for this