Cisco Unified MeetingPlace Release 6.1 -- Worksheet 3-2: Telephony Requirements for ISDN-PRI Lines (U.S., Canada, Japan)

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Cisco Unified MeetingPlace Release 6.1 > Cisco Unified MeetingPlace Audio Server > Planning the installation > Telephony and LAN Planning > Telephony and LAN Planning Worksheets




This worksheet describes the telephony requirements for ISDN-PRI lines for the United States, Canada, and Japan.


Task Description Complete

Access ports

Number of access ports (user licenses) your company purchased: #_____________

Telephony setup

How Cisco Unified MeetingPlace will attach to the phone network:

  • Directly to PSTN (U.S. and Canada only)
  • Through a PBX

ISDN-PRI lines

Order ISDN-PRI lines to accommodate the number of ISDN-PRI ports purchased.

Trunking type

The trunking type provided to the Cisco Unified MeetingPlace system: Digital trunks

PBX requirements

Order additional hardware or software for your PBX to accommodate new T1 lines.


The following telephony components or services can take from 4 to 6 weeks to order and install:

  • Network Telco Service (trunk lines, main phone number, or combined access numbers)
  • PBX specific hardware or software (Smart Blades, software upgrade)
  • Additional hardware (CSU, UPS)

Cisco Unified MeetingPlace phone number(s)

The main phone number (800 or local) at the beginning of the range.

Digital line requirements

  • Standard or fractional T1
  • Channelized into 24 channels (with 23 B-channels and one D-channel in timeslot 24)
  • NFAS (Non-Facility Associated Signaling with one ISDN trunk controlled by the D-channel of another) is not allowed
  • Ability to receive calls
  • Ability to place calls (required for outdials and alarm outcalls)
  • Ability to hunt all ports (linear, circular, UCD, or ACD)
  • Toll restriction on ports lifted (required for outdials and alarm outcalls)
  • DTMF generated by all PBX or network phones, including the operator console
  • Male RJ-48C jack connector (U.S. and Canada only)

Note: PBX/Telco must provide disconnect supervision.

Numbering plan


If using DID Meeting Access, numbering plan for DID/DNIS or DDI, including ranges for Combined, Profile, and Direct Meeting Access

Signaling

  • AT&T TR41459 ISDN (default configuration)
  • Nortel DMS-100 ISDN* Telcordia Technologies NI-2 ISDN

Coding format

B8ZS (strongly recommended), or one of the following:

  • Jammed Bit (bit stuffing)
  • AMI

Note: If AMI is used, the number of zeros (0) in a row may exceed the recommended Telco value of 15. This can happen if all participants in the same meeting are on the same span. In that case, a 0s pattern can be sent to all channels at the same time, exceeding the maximum. This, in turn, can lead to meeting participants being dropped by the Telco from the meeting. Therefore, use B8ZS or Jammed Bit, if possible.

Framing

One of the following:

  • Extended super frame (ESF) (strongly recommended)
  • Standard super frame D4 (SF/D4)

Note: T1 facilities using D4 framing are susceptible to false triggering of "yellow alarm" signals. This false triggering can lead to dropped calls. Conferencing applications are particularly susceptible to this problem with D4 framing. The problem can occur when all 24 channels on a single span are in a conference and are carrying identical data streams. D4 transmission equipment in the network can falsely interpret the identical data on all 24 channels as a "yellow alarm" signal. For this reason, Cisco recommends configuring T1 spans for ESF framing.

Additional hardware

Channel service unit (CSU) required for each T1 connection over 330 feet (100 meters) from the demarcation point (demarc) or from the PBX.

Modem requirements

  • Analog phone line, or PBX connection
  • Pilot number, accessible from outside
  • RJ-11C connector

Translation table

Translation table requirements for dialing restrictions.

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